Solar photovoltaic panel convenient to position and maintain

Abstract

The utility model provides a solar photovoltaic panel convenient to position and maintain, which comprises a frame and packaging battery pieces, a plurality of packaging battery pieces are connected in series to form a packaging battery piece group, and a plurality of packaging battery piece groups are arranged in the frame and are connected in parallel to form a whole; a maintenance monitoring circuit is connected in parallel with the packaged battery piece group, the maintenance monitoring circuit is composed of a bypass module and a monitoring module which are reversely connected in parallel with the packaged battery piece group, and the monitoring module is connected with a cathode of the bypass module. According to the utility model, the internal structure of the solar photovoltaic panel is set to be a series-parallel hybrid topology, thereby avoiding the series influence between packaging battery piece groups between single groups, and providing a basis for rapid disassembly, assembly and maintenance; and a maintenance monitoring circuit is arranged, whether the packaged battery piece in the branch is burnt down due to the hot spot effect is judged through the bypass module, data information is uploaded and fed back through the monitoring module, and a damaged position area is indicated on site through the state indication module.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a solar photovoltaic panel that is easy to locate and maintain. Background Technology

[0002] Existing solar photovoltaic panels consist of a frame, a glass substrate, and a backsheet forming a basic framework structure. Within this framework, several encapsulated solar cells are installed, connected in series sequentially. This structure is susceptible to burnout due to hot spot effects when a single solar cell is shaded, causing an open circuit within the solar photovoltaic panel and resulting in failure. Currently, a bypass module can be added and connected in reverse parallel with the encapsulated solar cells. When an encapsulated solar cell is subjected to hot spot effects, the bypass module breaks down, ensuring that the remaining encapsulated solar cells can continue to operate.

[0003] Due to cost factors, it is difficult to install a bypass module on every packaged solar cell. Usually, multiple packaged solar cells are connected in series to form a packaged solar cell group and then connected in reverse parallel with a single bypass module. The breakdown and conduction process of the bypass module needs to be detected by manual inspection. It is difficult to provide timely and accurate feedback on the breakdown and conduction process of the bypass module, which reduces the efficiency of the solar photovoltaic panel during use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a solar photovoltaic panel that is easy to locate and maintain, and provides timely and accurate feedback on the breakdown and conduction status of the bypass module, thus providing conditions for locating the damaged area of ​​the solar photovoltaic panel and timely maintenance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a solar photovoltaic panel that is easy to position and maintain, including a frame and encapsulated cells, a plurality of encapsulated cells connected in series to form an encapsulated cell group, a plurality of encapsulated cell groups arranged in the frame and the plurality of encapsulated cell groups connected in parallel to form a whole;

[0006] A maintenance monitoring circuit is connected in parallel with the packaged battery cell group. The maintenance monitoring circuit consists of a bypass module and a monitoring module connected in reverse parallel with the packaged battery cell group. The monitoring module is connected to the cathode of the bypass module.

[0007] Furthermore, the monitoring module includes a current sensor and a microcontroller. The current sensor is connected to the cathode of the bypass module, and the signal output terminal of the current sensor is connected to the signal receiving terminal of the microcontroller.

[0008] Furthermore, the monitoring module is fixedly mounted on the backlight side of the packaged battery cell assembly, and an insulating partition is provided between the monitoring module and the packaged battery cell assembly.

[0009] Furthermore, a glass substrate is disposed on the light-facing surface of the encapsulated battery pack.

[0010] Furthermore, the insulating separator and the glass substrate are the same size and are edge-sealed by a frame, and the encapsulated battery cell assembly is sandwiched between the insulating separator and the glass substrate.

[0011] Furthermore, it also includes a status indicator module, which includes a first indicator light connected to the positive terminal of the bypass module.

[0012] Furthermore, the status indication module also includes a second indicator light, which is connected in series with the packaged battery cell group, and the color of the first indicator light is different from that of the second indicator light.

[0013] Furthermore, the first indicator light and the second indicator light are fixedly disposed on one side of the frame.

[0014] Compared with the prior art, the beneficial effects of this utility model include:

[0015] 1) By setting the internal structure of the solar photovoltaic panel to a "series-parallel hybrid" topology, the series influence between the encapsulated cell groups of a single group is avoided, providing a basis for quick disassembly and maintenance; and a maintenance monitoring circuit is set up. The bypass module determines whether the encapsulated cell in the branch is burned due to the hot spot effect, while the monitoring module uploads and feeds back the data information, and the status indicator module indicates the damaged area on site.

[0016] 2) By setting up a first indicator light and a second indicator light to distinguish the status of the packaged battery cell group, on-site inspection and maintenance personnel can intuitively observe the damaged location and specific operating status of the solar photovoltaic panel. Attached Figure Description

[0017] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0018] Figure 1 The diagram illustrates the circuit connections of solar photovoltaic panels for easy location and maintenance.

[0019] Figure 2 The schematic diagram shows a cross-sectional view of a solar photovoltaic panel that is easy to position and maintain.

[0020] The numbers in the diagram are: 1-frame, 2-encapsulated battery cell, 3-encapsulated battery cell group, 4-maintenance monitoring circuit, 5-bypass module, 6-monitoring module, 61-current sensor, 62-microcontroller, 7-insulating separator, 8-glass substrate, 9-status indicator module, 91-first indicator light, 92-second indicator light. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] A solar photovoltaic panel that is easy to position and maintain includes a frame 1 and encapsulated solar cells 2. A plurality of encapsulated solar cells 2 are connected in series to form an encapsulated solar cell group 3. The encapsulated solar cell group 3 is arranged in the frame 1 along the length or width direction. An insulating partition 7 is provided on the back side of the encapsulated solar cell group 3, and a glass substrate 8 is provided on the light-facing side of the encapsulated solar cell group 3. The insulating partition 7 and the glass substrate 8 are the same size and are sealed by the frame 1. The encapsulated solar cell group 3 is sandwiched between the insulating partition 7 and the glass substrate 8 to form a solar photovoltaic panel.

[0023] The solar photovoltaic panel of this utility model uses a "series-parallel hybrid" topology to arrange the encapsulated cell groups 3. That is, multiple encapsulated cell groups 3 are combined into one encapsulated cell group 3 by series connection, and then multiple encapsulated cell groups 3 are connected and combined in parallel connection. With this setting, the number of parallel branches can be flexibly adjusted according to load requirements, and when a single encapsulated cell group 3 fails, it will not affect the normal operation of the encapsulated cell groups 3 in other branches, effectively avoiding the problem of single-point failure leading to the failure of the entire string in series connection. Moreover, when maintenance is required on the faulty branch, the difficulty of disassembly and assembly is reduced and the workload of disassembly and assembly is greatly reduced.

[0024] To facilitate the location and timely maintenance of encapsulated solar cells 2 burned out due to hot spot effects, thus ensuring the overall efficiency of the solar photovoltaic panel, a maintenance monitoring circuit 4 is connected in parallel with the single encapsulated solar cell group 3. This circuit consists of a bypass module 5 and a monitoring module 6 connected in reverse parallel to the encapsulated solar cell group 3. The monitoring module 6 is connected to the cathode of the bypass module 5 and is used to monitor the current flow in the maintenance monitoring circuit 4. The monitoring module 6 includes a current sensor 61 and a microcontroller 62. The current sensor 61 is connected to the cathode of the bypass module 5, and its signal output terminal is connected to the signal receiving terminal of the microcontroller 62. In this invention, the current sensor 61 can be a Hall effect sensor, and the microcontroller 62 can be an ESP32 chip.

[0025] In practical use, when all the encapsulated cells 2 in the encapsulated cell pack 3 are in normal working condition, the encapsulated cell pack 3 is close to a state of zero resistance. Therefore, current flows through the encapsulated cell pack 3, but no current flows through the maintenance monitoring circuit 4. At this time, the current sensor 61 cannot detect the current or the current reading is close to zero. When one or more encapsulated cells 2 in the encapsulated cell pack 3 are blocked, the local temperature rises due to the hot spot effect and may even burn out. When one or more encapsulated cells 2 are burned out, the circuit in the encapsulated cell pack 3 is in an open circuit state. At this time, the current flows through the maintenance monitoring circuit 4. The maintenance monitoring circuit 4 is turned on by breaking down the bypass module 5. At this time, the current sensor 61 can obtain the current reading, and then transmit the current data to the microcontroller 62. The microcontroller 62 uploads the data to the cloud for judgment and can immediately provide feedback on the damage status of the encapsulated cell pack 3. The location of the damaged solar photovoltaic panel and the encapsulated cell pack 3 can be quickly determined by the location of the microcontroller 62, and maintenance personnel can go to the location to complete the disassembly and maintenance process. For ease of setup, the aforementioned monitoring module 6 can be fixed on the side of the insulating partition 7 facing away from the encapsulated battery cell pack 3.

[0026] To facilitate maintenance personnel in quickly identifying the location of the damage upon arrival at the site, a status indication module 9 is also provided. The status indication module 9 includes a first indicator light 91, which is connected to the anode of the bypass module 5. When the packaged cell assembly 3 is in normal operating condition, there is no current in the maintenance monitoring circuit 4, so no current flows through the first indicator light 91, and it remains off. When a single packaged cell 2 in the packaged cell assembly 3 burns out due to a hot spot effect, causing the bypass module 5 to be reverse-broken, current flows through the maintenance monitoring circuit 4, causing the first indicator light 91 to illuminate. Upon arrival at the site, maintenance personnel can directly identify the faulty packaged cell assembly 3 by observing the illuminated first indicator light 91.

[0027] In some embodiments, the status indicator module 9 further includes a second indicator light 92, which is connected in series with the packaged battery cell group 3. The second indicator light 92 and the first indicator light 91 have different colors; for example, the first indicator light 91 is set to red, while the second indicator light 92 is set to green. When current normally flows through the packaged battery cell group 3, the second indicator light 92 lights up and is green, while the first indicator light 91 is off. When the packaged battery cell group 3 burns out, and current flows through the maintenance monitoring circuit 4, the second indicator light 92 is off, while the first indicator light 91 lights up and is red. By fixing the aforementioned first indicator light 91 and second indicator light 92 to one side of the frame 1 and corresponding to the position of the packaged battery cell group 3, it is convenient for on-site maintenance personnel to quickly locate and confirm the faulty packaged battery cell group 3.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A solar photovoltaic panel for easy positioning and maintenance, comprising a frame (1) and encapsulated solar cells (2), wherein a plurality of the encapsulated solar cells (2) are connected in series to form an encapsulated solar cell group (3), and a plurality of the encapsulated solar cell groups (3) are arranged in the frame (1) and the plurality of encapsulated solar cell groups (3) are connected in parallel to form a whole; characterized in that, A maintenance monitoring circuit (4) is connected in parallel with the encapsulated battery cell group (3). The maintenance monitoring circuit (4) consists of a bypass module (5) and a monitoring module (6) connected in reverse parallel with the encapsulated battery cell group (3). The monitoring module (6) is connected to the cathode of the bypass module (5).

2. The solar photovoltaic panel for easy positioning and maintenance according to claim 1, characterized in that, The monitoring module (6) includes a current sensor (61) and a microcontroller (62). The current sensor (61) is connected to the cathode of the bypass module (5), and the signal output terminal of the current sensor (61) is connected to the signal receiving terminal of the microcontroller (62).

3. The solar photovoltaic panel for easy positioning and maintenance according to claim 1, characterized in that, The monitoring module (6) is fixedly installed on the backlight side of the encapsulated battery cell group (3), and an insulating partition (7) is provided between the monitoring module (6) and the encapsulated battery cell group (3).

4. The solar photovoltaic panel for easy positioning and maintenance according to claim 3, characterized in that, A glass substrate (8) is provided on the light-facing surface of the encapsulated battery cell assembly (3).

5. The solar photovoltaic panel for easy positioning and maintenance according to claim 4, characterized in that, The insulating partition (7) and the glass substrate (8) are the same size and are sealed with a frame (1). The encapsulated battery cell assembly (3) is sandwiched between the insulating partition (7) and the glass substrate (8).

6. The solar photovoltaic panel for easy positioning and maintenance according to claim 1, characterized in that, It also includes a status indicator module (9), which includes a first indicator light (91) connected to the positive terminal of the bypass module (5).

7. The solar photovoltaic panel for easy positioning and maintenance according to claim 6, characterized in that, The status indicator module (9) also includes a second indicator light (92), which is connected in series with the packaged battery cell group (3). The color of the first indicator light (91) is different from that of the second indicator light (92).

8. The solar photovoltaic panel for easy positioning and maintenance according to claim 7, characterized in that, The first indicator light (91) and the second indicator light (92) are fixedly disposed on one side of the frame (1).

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