A photovoltaic module

Abstract

The embodiment of the present application provides a photovoltaic module, including a plurality of battery strings arranged in parallel, and a junction box connected to each battery string respectively, the battery string is composed of battery substrings, the junction box includes an intelligent junction box and at least one bypass junction box, the bypass junction box is provided with a bypass diode connected to the battery substring; the intelligent junction box is provided with a bypass diode connected to the battery substring, and a shutdown module; the shutdown module is provided with a communication port and a first input terminal and a second input terminal, the first input terminal is connected to the battery substring in the first battery string, and the second input terminal is connected to the battery substring in the last battery string; the junction box of the first battery string is provided with a negative power supply port, and the junction box of the last battery string is provided with a positive power supply port. By controlling multiple battery strings through an intelligent junction box, the cost of controlling the battery strings separately is reduced, the continuous output voltage when the photovoltaic module fails is avoided, and the safety of the photovoltaic module is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Art

[0002] At present, with the development of new energy, photovoltaic power generation has gradually received attention. Photovoltaic modules are devices used for photovoltaic power generation. There are one or more battery strings in a photovoltaic module. Each battery string is connected to a junction box. In the junction box, bypass diodes are connected to the battery string to protect the battery string.

[0003] At present, in order to improve the safety of photovoltaic modules, a circuit board is set in each junction box to intelligently control each battery string and realize functions such as intelligent shutdown and power detection.

[0004] However, the above solution requires intelligent junction boxes for each battery string connection, which will increase the cost of photovoltaic modules and easily block sunlight to cause power loss, resulting in low power generation efficiency. Summary of the invention

[0005] In view of the above problems, embodiments of the present application are proposed to provide a photovoltaic component that overcomes the above problems or at least partially solves the above problems.

[0006] The embodiment of the present application discloses a photovoltaic assembly, comprising a plurality of battery strings arranged in parallel, and a junction box respectively connected to each of the battery strings, wherein the battery string is composed of battery sub-strings, and the junction box comprises an intelligent junction box and at least one bypass junction box, wherein:

[0007] The bypass junction box is provided with a first bypass diode connected to a battery substring in the battery string;

[0008] The smart junction box is provided with a second bypass diode connected to a battery substring in the battery string, and a shutdown module;

[0009] The first bypass diode and the second bypass diode are connected in series;

[0010] The shutdown module is provided with a communication port for receiving a shutdown instruction and a first input end and a second input end, wherein the first input end is connected to a battery substring in a first battery string arranged in parallel, and the second input end is connected to a battery substring in a last battery string arranged in parallel;

[0011] The junction box corresponding to the first battery string is provided with a negative power supply port, and the junction box corresponding to the last battery string is provided with a positive power supply port, and the negative power supply port and the positive power supply port are respectively used to connect to the output cable.

[0012] Optionally, in an exemplary embodiment of the present disclosure, the smart junction box is provided with a communication port, and the communication port of the shutdown module is connected to the communication port of the smart junction box.

[0013] Optionally, in an exemplary embodiment of the present disclosure, a temperature detection module is provided in the intelligent junction box, and the temperature detection module is provided with a communication port, and the communication port of the temperature detection module is connected to the communication port of the shutdown module.

[0014] Optionally, in an exemplary embodiment of the present disclosure, the photovoltaic assembly also includes a pluggable component, the pluggable component includes a voltage detection module, the voltage detection module is provided with a communication port and a power port, and the power port of the voltage detection module is connected to the first input terminal and the second input terminal of the shutdown module.

[0015] Optionally, in an exemplary embodiment of the present disclosure, the pluggable component further includes a single-chip microcomputer, the single-chip microcomputer is provided with a communication port, and the communication port of the single-chip microcomputer is connected to the communication port of the shutdown module.

[0016] Optionally, in an exemplary embodiment of the present disclosure, the communication port of the single chip microcomputer is connected to the communication port of the voltage detection module.

[0017] Optionally, in an exemplary embodiment of the present disclosure, the anode of the bypass diode is connected to the cathode of the battery substring, and the cathode of the bypass diode is connected to the anode of the battery substring.

[0018] Optionally, in an exemplary embodiment of the present disclosure, there are three battery strings, each of which is composed of two connected battery sub-strings, and there are two bypass junction boxes.

[0019] Optionally, in an exemplary embodiment of the present disclosure, the first input end of the shutdown module is connected to the outer battery substring in the first battery string arranged in parallel, and the second input end of the shutdown module is connected to the outer battery substring in the last battery string arranged in parallel.

[0020] Optionally, in an exemplary embodiment of the present disclosure, the negative power port is connected to the outer battery substring in the first battery string arranged in parallel, and the positive power port is connected to the outer battery substring in the last battery string arranged in parallel.

[0021] The embodiments of the present invention include the following advantages:

[0022] The bypass junction box is provided with a first bypass diode connected to a battery substring in a battery string; the smart junction box is provided with a second bypass diode connected to a battery substring in the battery string, and a shutdown module; the first bypass diode and the second bypass diode are connected in series; the shutdown module is provided with a communication port for receiving a shutdown instruction and a first input end and a second input end, the first input end is connected to a battery substring in the first battery string arranged in parallel, and the second input end is connected to a battery substring in the last battery string arranged in parallel; the junction box corresponding to the first battery string is provided with a negative power supply port, and the junction box corresponding to the last battery string is provided with a positive power supply port, and the negative power supply port and the positive power supply port are respectively used to connect to the output cable. This enables the battery strings corresponding to the smart junction box and other common bypass junction boxes to be controlled by one smart junction box, and the intelligent control cost is reduced while ensuring the control capability of the photovoltaic module, and the sunshade is reduced, thereby avoiding the reduction of power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a bypass junction box provided in the current solution provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a photovoltaic assembly with a built-in shutdown module provided by an embodiment of the present invention;

[0025] Figure 3 1 is a schematic diagram of the structure of an intelligent junction box with a built-in disconnection module provided in an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of an intelligent junction box with a built-in disconnection module and a temperature detection module provided by an embodiment of the present invention;

[0027] Figure 5 It is a structural schematic diagram of a pluggable component with a built-in voltage detection module and an intelligent junction box provided by an embodiment of the present invention;

[0028] Figure 6 It is a structural schematic diagram of a pluggable component with a built-in voltage detection module and a single-chip microcomputer and an intelligent junction box provided by an embodiment of the present invention;

[0029] Figure 7 is a structural schematic diagram of an intelligent junction box with a sealed upper cover provided by an embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of the structure of a photovoltaic assembly in which a smart junction box is connected to an intermediate battery string according to an embodiment of the present invention;

[0031] Fig. 9is a schematic diagram of the structure of a photovoltaic assembly in which a smart junction box provided by an embodiment of the present invention is connected to a battery string on the right;

[0032] Fig.10 It is a schematic diagram of the structure of a photovoltaic assembly of six battery strings controlled by an intelligent junction box provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Photovoltaic module is the abbreviation of solar photovoltaic module, which is used to directly convert the sun's light energy into electrical energy. The ground photovoltaic system uses a large number of silicon-based silicon solar cells, which can be divided into single crystal silicon, polycrystalline silicon, and amorphous silicon solar cells.

[0035] In a photovoltaic power generation system, battery strings are connected to form photovoltaic modules in series. After several photovoltaic modules are connected in series, a circuit unit with a certain DC output is formed, namely a photovoltaic string. The photovoltaic module includes a positive power port and a negative power port. The negative power port of a photovoltaic module is connected to the positive power port of the next photovoltaic module to form a photovoltaic string.

[0036] The cell string that is shaded from the sun will be treated as a load and consume the energy generated by other illuminated cell strings. The shaded cell string will heat up and produce a hot spot effect. Part of the energy generated by the illuminated cell string may be consumed by the shaded cell string. In order to prevent the photovoltaic module from being damaged by the hot spot effect, a bypass diode will be connected in parallel between the positive and negative poles of the cell string to prevent the energy generated by the illuminated module from being consumed by the shaded module.

[0037] The positive pole of the bypass diode is connected to the negative pole of the battery substring, and the negative pole of the bypass diode is connected to the positive pole of the battery substring. When the hot spot effect occurs in the battery cell, the bypass diode allows the current generated by other battery cells to flow out of the diode, so that the power generation system continues to generate electricity, and the photovoltaic module will not fail due to a problem with a battery string.

[0038] like Figure 1 As shown, the current solution is to connect each battery string 10 to a bypass diode 13 in a bypass junction box 12. The battery string 10 can be formed by connecting two battery substrings 11. The bypass junction box 12 is provided with a bypass diode 13. The bypass junction box 12 can also be provided with a circuit board, so that each bypass junction box is intelligent. Three battery strings 10 can form a photovoltaic module, and the photovoltaic module has a negative power supply port 14 and a positive power supply port 15.

[0039] Figure 2Schematic diagram of the structure of the photovoltaic module provided by the embodiment of the present invention. Figure 2 As shown, the connection relationship between the components of the photovoltaic module is schematically shown.

[0040] The photovoltaic module may include a plurality of, for example, three battery strings 10 arranged in parallel, and junction boxes respectively connected to each battery string. The battery string 10 may be composed of two battery sub-strings 11 . The junction boxes include an intelligent junction box 20 and at least one bypass junction box 12 .

[0041] For more details, refer to Figure 3 As shown, the intelligent junction box 20 is provided with a second bypass diode 26 for connecting to a battery substring in a battery string, and a shutdown module 22; the first bypass diode and the second bypass diode 26 are connected in series; the shutdown module 22 is provided with a communication port for receiving a shutdown instruction, including a first communication port 21 and a second communication port 23, and a first input terminal 24 and a second input terminal 25, the first input terminal 24 is connected to a battery substring in the first battery string arranged in parallel, and the second input terminal 25 is connected to a battery substring in the last battery string arranged in parallel; the junction box corresponding to the first battery string is provided with a negative power supply port, and the junction box corresponding to the last battery string is provided with a positive power supply port, and the negative power supply port and the positive power supply port are respectively used to connect to the output cable.

[0042] Multiple PV panels can be connected to form a PV string through output cables. The PV string is connected to the input of the inverter, and the output of the inverter is connected to the input of the box-type transformer. The output of multiple box-type transformers are connected in parallel by collector cables and connected to the input of the booster station. The output of the booster is connected to the transmission line to achieve grid connection.

[0043] It is understandable that the fast shutdown module can also be connected to a cluster controller, and the cluster controller detects whether the photovoltaic module is connected to an external circuit. When the photovoltaic module is not connected to an external circuit, the cluster controller sends a control shutdown instruction to the shutdown module, and the shutdown module responds to the control shutdown instruction so that the working state of the shutdown module is closed, that is, the positive power port and the negative power port are directly short-circuited from the inside to avoid DC voltage. Therefore, when the power circuit, communication circuit, etc. connected between the fast shutdown module or the photovoltaic module is interrupted, such as an external fire causing burning, the cluster controller sends a control shutdown instruction to the shutdown module, and the photovoltaic module is in an internal short-circuit state to the outside, and will not output DC voltage to the outside.

[0044] Among them, the battery string can be formed by connecting one or more battery substrings, and multiple battery substrings can be connected in series to form a battery string. Multiple battery strings are connected to form a photovoltaic module, and multiple battery strings can be connected in series to form a photovoltaic module. A shutdown module is set in the intelligent junction box, and the shutdown module can receive a shutdown instruction through the communication port to short-circuit the photovoltaic module to prevent the photovoltaic module from continuously outputting voltage. The shutdown module has two input terminals, namely a first input terminal and a second input terminal. The first input terminal is connected to the battery substring in the first battery string arranged in parallel, and the second input terminal is connected to the battery substring in the last battery string arranged in parallel. After receiving the shutdown instruction, the shutdown module directly connects the battery substring in the first battery string and the battery substring in the last battery string, so that the photovoltaic module is directly short-circuited internally, allowing the current generated by the photovoltaic module due to light to circulate inside each substring, and not output voltage to the outside, so as to realize the function of quickly cutting off the voltage output of the photovoltaic module.

[0045] The first input end of the shutdown module can be connected to the outer battery substring in the first battery string arranged in parallel, and the second input end of the shutdown module can be connected to the outer battery substring in the last battery string arranged in parallel. Then the outer battery substring in the first battery string is connected to the battery substring in the second battery string close to the first battery string, and the battery substring in the second battery string close to the first battery string is connected to the battery substring in the third battery string close to the second battery string, and so on, multiple battery strings can be connected.

[0046] Optionally, the smart junction box is provided with a communication port, and the communication port of the shutdown module is connected to the communication port of the smart junction box.

[0047] A communication port is set in the smart junction box, and the communication port of the shutdown module is connected to the communication port of the smart junction box. The communication port of the smart junction box can be connected to other external devices, such as a terminal device. The shutdown command is transmitted to the communication port of the smart junction box through the terminal device, and the shutdown module receives the shutdown command through the communication port of the smart junction box, thereby directly short-circuiting the photovoltaic module internally and not outputting voltage to the outside.

[0048] Optionally, a temperature detection module is provided in the intelligent junction box, and the temperature detection module is provided with a communication port, and the communication port of the temperature detection module is connected to the communication port of the shutdown module.

[0049] like Figure 4As shown, the temperature detection module 27 has a third communication port 41 and a fourth communication port 42. The third communication port 41 and the fourth communication port 42 of the temperature detection module 27 are respectively connected to the first communication port 21 and the second communication port 23 of the shutdown module 22. The two communication ports of the temperature detection module 27 include the third communication port 41 and the fourth communication port 42, and can also be connected to the two communication ports of the smart junction box including the fifth communication port 43 and the sixth communication port 43. The temperature detection module 27 can transmit the temperature data detected by it to the outside through the fifth communication port 43 and the sixth communication port 43 of the smart junction box 20. For example, the fifth communication port 43 and the sixth communication port 43 of the smart junction box can be connected to other external devices, such as terminal devices. The temperature detection module 27 transmits the temperature data detected by it to the connected terminal device through the fifth communication port 43 and the sixth communication port 43 of the smart junction box 20, and the terminal device can store the temperature data or perform other data analysis based on the temperature data.

[0050] A temperature threshold can be set in the temperature detection module 27. When the temperature detection module 27 detects that the temperature of the photovoltaic component has reached the temperature threshold, a shutdown instruction is transmitted to the two communication ports of the shutdown module 22 through the two communication ports of the temperature detection module 27. The switch inside the shutdown module 22 is closed, so that the photovoltaic component is directly short-circuited internally and no voltage is output to the outside.

[0051] In the implementation of the embodiment of the present disclosure, by setting a temperature detection module, the communication port of the temperature detection module is connected to the communication port of the shutdown module, and the communication port of the temperature detection module is connected to the communication port of the intelligent junction box. The temperature data obtained by the temperature detection module can be transmitted to the outside, and the shutdown module can be directly controlled based on the temperature data obtained by the temperature detection module, so as to avoid the photovoltaic module from continuing to output voltage when a fault occurs in a high temperature situation, thereby improving the safety of the photovoltaic module.

[0052] Optionally, the photovoltaic assembly further includes a pluggable component, the pluggable component includes a voltage detection module, the voltage detection module is provided with a communication port and a power port, and the power port of the voltage detection module is connected to the first input terminal and the second input terminal of the shutdown module.

[0053] like Figure 5As shown, the pluggable component 30 is inserted into the smart junction box 20, and then the voltage detection module in the pluggable component 30 can be connected to the shutdown module in the smart junction box 20, and the connection method is that the two power ports of the voltage detection module are respectively connected to the first input end and the second input end of the shutdown module. Since the first input end of the shutdown module is connected to the battery substring in the first battery string arranged in parallel, and the second input end is connected to the battery substring in the last battery string arranged in parallel, after the two power ports of the voltage detection module are connected to the first input end and the second input end of the shutdown module, the voltage data of the entire photovoltaic module can be detected.

[0054] By implementing the embodiments of the present disclosure, the voltage detection module can be set in the pluggable component, and the pluggable component can be conveniently inserted into or removed from the smart junction box. This makes it possible to conveniently add the voltage detection function while controlling the cost and size of the smart junction box, thereby enhancing the structural flexibility of the photovoltaic module and meeting the needs of different users.

[0055] Optionally, the pluggable component further includes a single-chip microcomputer, the single-chip microcomputer is provided with a communication port, and the communication port of the single-chip microcomputer is connected to the communication port of the shutdown module.

[0056] like Figure 6 As shown, the single-chip microcomputer 60 has two communication ports, a seventh communication port 61 and an eighth communication port 62. The seventh communication port 61 and the eighth communication port 62 of the single-chip microcomputer 60 are respectively connected to the first communication port 21 and the second communication port 23 of the shutdown module 22. The single-chip microcomputer 60 can send a shutdown instruction to the shutdown module 22 through the seventh communication port 61 and the eighth communication port 62. After receiving the shutdown instruction, the shutdown module 22 controls the internal switch to turn off, so that the photovoltaic module is short-circuited internally.

[0057] It is understandable that the pluggable components and the voltage detection module and the single-chip microcomputer inside them can also be directly integrated with the smart junction box, so that the smart junction box can have multiple functions without the need to install and plug other components.

[0058] By implementing the embodiments of the present disclosure, a single-chip microcomputer can be set in the pluggable component, and the communication port of the single-chip microcomputer can be connected to the communication port of the shutdown module to conveniently control whether the shutdown module is turned off or not. Since the single-chip microcomputer is a component that is easy to wear and has a short service life, the single-chip microcomputer is set in the pluggable component to control the shutdown module, which can conveniently replace the vulnerable parts, making the structure of the photovoltaic module more flexible and unnecessary to replace the entire smart junction box, thereby reducing the maintenance cost and improving the convenience of photovoltaic module maintenance.

[0059] Optionally, in an exemplary embodiment of the present disclosure, the communication port of the single chip microcomputer is connected to the communication port of the voltage detection module.

[0060] Continue to refer Figure 6 As shown, the single-chip microcomputer 60 includes another ninth communication port, and the voltage detection module 63 includes a tenth communication port. The ninth communication port of the single-chip microcomputer 60 is connected to the tenth communication port of the voltage detection module 63, and the single-chip microcomputer 60 can obtain the voltage data of the photovoltaic module detected by the voltage detection module 63. In addition, since the two communication ports of the single-chip microcomputer 60, the seventh communication port 61 and the eighth communication port 62 are respectively connected to the first communication port 21 and the second communication port 23 of the shutdown module 22, and the two communication ports of the shutdown module 22 are connected to the two communication ports of the intelligent junction box, the single-chip microcomputer 60 can transmit the voltage data to the external terminal device through the communication port of the intelligent junction box 20 after obtaining the voltage data of the voltage detection module. The transmitted voltage data can be uploaded to the database for storage, or analyzed and processed in the terminal device, and the problems existing in the photovoltaic module can be identified based on the voltage data. For example, based on the voltage data of each photovoltaic module, the faulty photovoltaic module can be found in the large-area power generation module; the working state of the photovoltaic module can also be analyzed based on the voltage data, such as the power generation efficiency of the photovoltaic module, the health of the photovoltaic module, etc.

[0061] By implementing the embodiments of the present disclosure, a single-chip microcomputer can be set in the pluggable component that has been provided with the voltage detection module. The single-chip microcomputer can directly control the switch of the shutdown module, and can also obtain the voltage data detected by the voltage detection module and transmit the voltage data through the communication port of the intelligent junction box. This enables real-time detection of the voltage condition of the photovoltaic module, further improving the safety of the photovoltaic module.

[0062] It is understandable that when the smart junction box is provided with a structure for pluggable components to be inserted, if the pluggable components are not installed, the internal structure of the smart junction box will be exposed to the outside world. Therefore, a sealed upper cover of the smart junction box can be provided at the position of the structure for pluggable components to be inserted.

[0063] like Figure 7 As shown, the smart junction box 20 may include a temperature detection module and a shutdown module, but does not have pluggable components. A sealed upper cover 70 is provided on the top of the smart junction box 20 .

[0064] Optionally, in an exemplary embodiment of the present disclosure, there are three battery strings, each of which is composed of two connected battery sub-strings, and there are two bypass junction boxes.

[0065] The smart junction box may be a junction box located at the second battery string, and the bypass junction box may be a junction box corresponding to the first battery string and the third battery string. The present disclosure does not limit the location of the smart junction box and the number of the bypass junction boxes. Figure 2 The photovoltaic assembly shown includes three battery strings, one battery string includes two battery sub-strings, and a bypass diode is included in the smart junction box 20. The bypass diode in the smart junction box 20 is connected to the battery string located in the middle position among the three parallel battery strings. The left and right sides of the smart junction box 20 are respectively a bypass junction box 12, and the three battery strings are connected in series.

[0066] like Figure 8 As shown, the smart junction box 20 is inserted with a pluggable component 30, which may include the above-mentioned modules or components, which will not be described in detail here. The smart junction box 20 can be connected to the middle battery string 10 of the three parallel battery strings, and the left and right sides of the smart junction box 20 are bypass junction boxes 12 respectively.

[0067] like Fig. 9 As shown, the smart junction box 20 is inserted with a pluggable component 30, and the pluggable component 30 may include the above-mentioned modules, which will not be described in detail here. The smart junction box 20 can be connected to the rightmost battery string 10 of the three parallel battery strings, and the left side of the smart junction box 20 is two bypass junction boxes 12. The present disclosure does not limit the position of the smart junction box and the number of bypass junction boxes.

[0068] like Fig.10 As shown, Fig.10 The six battery strings 10 are divided into two rows, each row having three battery strings 10 arranged in parallel, and the corresponding two battery strings 10 in the upper and lower rows are connected to the same bypass junction box 12, so that one intelligent junction box 20 can control the photovoltaic assembly composed of six battery strings 10. The intelligent control cost of the photovoltaic assembly is further reduced, and the sun shielding can be reduced, thereby improving the power generation efficiency.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device that includes the elements. In addition, the part of the above-mentioned technical solution provided by the embodiment of the present invention that is consistent with the corresponding technical solution in the prior art in principle is not described in detail, so as to avoid excessive elaboration.

[0070] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic module, characterized in that: The invention comprises a plurality of battery strings arranged in parallel, and a junction box connected to each of the battery strings respectively, wherein the battery string is composed of battery sub-strings, and the junction box comprises an intelligent junction box and at least one bypass junction box, wherein: The bypass junction box is provided with a first bypass diode connected to a battery substring in the battery string; The smart junction box is provided with a second bypass diode connected to a battery substring in the battery string, and a shutdown module; The first bypass diode and the second bypass diode are connected in series; The shutdown module is provided with a communication port for receiving a shutdown instruction and a first input end and a second input end, wherein the first input end is connected to a battery substring in a first battery string arranged in parallel, and the second input end is connected to a battery substring in a last battery string arranged in parallel; The junction box corresponding to the first battery string is provided with a negative power supply port, and the junction box corresponding to the last battery string is provided with a positive power supply port, and the negative power supply port and the positive power supply port are respectively used to connect to the output cable.

2. The photovoltaic module according to claim 1, characterized in that: The smart junction box is provided with a communication port, and the communication port of the shutdown module is connected to the communication port of the smart junction box.

3. The photovoltaic module according to claim 1, characterized in that: The intelligent junction box is provided with a temperature detection module, and the temperature detection module is provided with a communication port, and the communication port of the temperature detection module is connected to the communication port of the shutdown module.

4. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly further includes a pluggable component, which includes a voltage detection module. The voltage detection module is provided with a communication port and a power port. The power port of the voltage detection module is connected to the first input terminal and the second input terminal of the shutdown module.

5. The photovoltaic module according to claim 4, characterized in that: The pluggable component further includes a single chip microcomputer, the single chip microcomputer is provided with a communication port, and the communication port of the single chip microcomputer is connected to the communication port of the shutdown module.

6. The photovoltaic module according to claim 5, characterized in that: The communication port of the single chip microcomputer is connected to the communication port of the voltage detection module.

7. The photovoltaic module according to claim 1, characterized in that: The anode of the bypass diode is connected to the cathode of the battery substring, and the cathode of the bypass diode is connected to the anode of the battery substring.

8. The photovoltaic module according to claim 1, characterized in that: There are three battery strings, each of which is composed of two connected battery sub-strings, and there are two bypass junction boxes.

9. The photovoltaic module according to claim 1, characterized in that: The first input end of the shutdown module is connected to the outer battery substring of the first battery string arranged in parallel, and the second input end of the shutdown module is connected to the outer battery substring of the last battery string arranged in parallel.

10. The photovoltaic module according to claim 1, characterized in that: The power source negative electrode port is connected to the outer battery substring in the first battery string arranged in parallel, and the power source positive electrode port is connected to the outer battery substring in the last battery string arranged in parallel.

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