Junction box assembly and photovoltaic assembly

Abstract

The application relates to a junction box assembly and a photovoltaic assembly. The junction box assembly is used in the photovoltaic assembly, the photovoltaic assembly comprises a photovoltaic cell string group, and the photovoltaic cell string group comprises a plurality of photovoltaic cell strings; the junction box assembly comprises a plurality of junction boxes, which are arranged correspondingly to the plurality of photovoltaic cell strings, and the junction box is electrically connected to the corresponding photovoltaic cell string; at least one junction box comprises a temperature sensor; wherein the junction box assembly comprises a controller and a shutoff device, and the temperature sensor and the shutoff device of each junction box are electrically connected to the controller. Therefore, the junction box assembly and the photovoltaic assembly provided by the application can reduce the cost of the junction box assembly and the photovoltaic assembly.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to junction box assemblies and photovoltaic modules. Background Technology

[0002] Solar cells, also known as photovoltaic cells, are semiconductor devices that directly convert sunlight into electrical energy. Because they are green and environmentally friendly products that do not cause pollution, and because solar energy is a renewable resource, solar cells are a new type of battery with broad development prospects.

[0003] In related technologies, photovoltaic modules include photovoltaic cell strings and junction boxes. The junction boxes are electrically connected to the photovoltaic cell strings, enabling data acquisition from the photovoltaic cell strings. However, the aforementioned junction boxes are relatively expensive. Utility Model Content

[0004] Therefore, it is necessary to provide a junction box assembly and a photovoltaic module that can reduce the cost of the junction box assembly and the photovoltaic module.

[0005] In a first aspect, embodiments of this application provide a junction box assembly for a photovoltaic module, the photovoltaic module including a photovoltaic cell string group, the photovoltaic cell string group including multiple photovoltaic cell strings; the junction box assembly includes:

[0006] Multiple junction boxes are provided, corresponding to multiple photovoltaic cell strings, and the junction boxes are electrically connected to their respective photovoltaic cell strings; at least one junction box includes a temperature sensor.

[0007] The junction box assembly includes a controller and a shut-off device, and the temperature sensor and shut-off device of each junction box are electrically connected to the controller.

[0008] The junction box assembly provided in this application uses a single controller to control the operating status of all temperature sensors and shut-off devices, and to acquire information from the temperature sensors and shut-off devices. This reduces the number of controllers and helps to lower the cost of the junction box assembly. In addition, the photovoltaic cell string can be turned on or off by turning on or off using the same shut-off device, which reduces the number of shut-off devices and further helps to lower the cost of the junction box assembly.

[0009] In one embodiment, the junction box assembly includes a first external terminal, a plurality of junction boxes including the first junction box, the first external terminal being mounted on the first junction box, the first external terminal being electrically connected to a first terminal of a switch, the positive terminal of the photovoltaic cell string being electrically connected to a second terminal of the switch, and the switch being configured to disconnect or connect the first and second terminals.

[0010] In one embodiment, the positive terminal of the controller is electrically connected to the second terminal of the switch and the positive terminal of the photovoltaic cell string.

[0011] In one embodiment, the junction box assembly includes a second external terminal, and a plurality of junction boxes include a second junction box. The second external terminal is mounted on the second junction box and is electrically connected to the negative terminal of the photovoltaic cell string.

[0012] In one embodiment, the junction box assembly includes a first conductive wire, through which the negative terminal of the controller is electrically connected to the negative terminal of the photovoltaic cell string.

[0013] In one embodiment, there is one first conductive line, and the negative terminal of at least one temperature sensor is electrically connected to the negative terminal of the controller through the first conductive line.

[0014] In one embodiment, the junction box assembly includes a communication module coupled to a controller;

[0015] The communication module includes a power line carrier communication module.

[0016] In one embodiment, the positive terminal of the communication module is electrically connected to the second terminal of the switch and the positive terminal of the photovoltaic cell string via a controller; and / or,

[0017] The negative terminal of the communication module is electrically connected to the negative terminal of the photovoltaic cell string via the controller; and / or,

[0018] The junction box assembly includes a first external terminal, and a first signal terminal of the communication module is coupled to the first external terminal; and / or,

[0019] The junction box assembly includes a second external terminal, and the second signal terminal of the communication module is coupled to the second external terminal.

[0020] In one embodiment, the controller includes at least one of a voltage sampling module and a current sampling module.

[0021] In one embodiment, both the controller and the shut-off device are located in the first junction box.

[0022] Secondly, embodiments of this application provide a photovoltaic module, including a photovoltaic cell string and a junction box assembly as described in the first aspect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a photovoltaic module provided in an embodiment of this application.

[0024] Figure 2 This is another structural schematic diagram of a photovoltaic module provided in an embodiment of this application.

[0025] Figure 3 This is another structural schematic diagram of a photovoltaic module provided in an embodiment of this application.

[0026] Figure 4 This is another structural schematic diagram of a photovoltaic module provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Photovoltaic module; 100. Junction box assembly; 120. Junction box; 121. First junction box; 122. Second junction box; 123. Third junction box; 130. Temperature sensor; 140. Controller; 150. Shut-off device; 151. First terminal; 152. Second terminal; 160. Communication module; 171. First external terminal; 172. Second external terminal; 181. First conductive wire; 182. Diode; A. Positive terminal of controller; B. Negative terminal of controller; C. Positive terminal of photovoltaic cell string; D. Negative terminal of photovoltaic cell string; E. Negative terminal of temperature sensor; 200. Photovoltaic cell string; 210. Photovoltaic cell string; 211. Photovoltaic cell. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] In related technologies, photovoltaic modules include multiple photovoltaic cell strings and multiple junction boxes, each junction box corresponding to a specific photovoltaic cell string and electrically connected to that string. Each junction box may contain a temperature sensor, a controller, and a shutdown device. Within the same junction box, the temperature sensor detects the temperature of the corresponding photovoltaic cell string, and the controller is electrically connected to both the temperature sensor and the shutdown device.

[0036] However, since each junction box contains a controller and a shutdown device, the number of controllers and shutdown devices in multiple junction boxes is relatively large, resulting in a high total cost for multiple junction boxes and consequently a high cost for photovoltaic modules.

[0037] To address the aforementioned issues, embodiments of this application provide a junction box assembly and a photovoltaic module, which can reduce the cost of the junction box assembly and the photovoltaic module.

[0038] The following will combine Figure 1 The junction box assembly and photovoltaic module provided in the embodiments of this application will be described.

[0039] See Figure 1 This application provides a junction box assembly 100 for a photovoltaic cell string group 200, which includes multiple photovoltaic cell strings 210. The junction box assembly 100 collects the current generated by the photovoltaic cell string group 200 and safely discharges it. It can also monitor the photovoltaic cell string group 200. The junction box assembly 100 is a key component connecting the photovoltaic cell string group 200 to external circuits.

[0040] See Figure 1 Junction box assembly 100 includes multiple junction boxes 120 ( Figure 1 The diagram shows three junction boxes 120. Multiple junction boxes 120 are correspondingly configured with multiple photovoltaic cell strings 210. Each junction box 120 is electrically connected to its corresponding photovoltaic cell string 210. The junction box 120 can be installed on its corresponding photovoltaic cell string 210. Thus, by using multiple junction boxes 120, the functions of the junction box assembly 100 can be distributed across multiple junction boxes 120, resulting in fewer electronic components in a single junction box 120. This simplifies the structure and wiring design of a single junction box 120. Furthermore, it facilitates the junction box assembly 100's regional monitoring of the photovoltaic cell string group 200, thereby improving the monitoring reliability of the junction box assembly 100.

[0041] In some embodiments, at least one junction box 120 includes a temperature sensor 130, which can be used to measure the temperature of the corresponding photovoltaic cell string 200.

[0042] See Figure 1 Each junction box 120 includes a temperature sensor 130, which can be used to measure the temperature of the corresponding photovoltaic cell string 210, thereby enabling temperature monitoring of the photovoltaic cell string group 200 in different areas and improving the reliability of temperature monitoring by the junction box assembly 100.

[0043] For example, when the controller 140 obtains that the temperature measured by the temperature sensor 130 is greater than or equal to the preset temperature, the controller 140 can control the shut-off device 150 to disconnect the first terminal 151 and the second terminal 152, so that the photovoltaic cell string group 200 has no output, in order to prevent the photovoltaic cell string 210 from overheating.

[0044] See Figure 1The junction box assembly 100 includes a controller 140 and a shut-off device 150. The temperature sensors 130 and shut-off devices 150 of each junction box 120 are electrically connected to the controller 140. Thus, the operating status of all temperature sensors 130 and shut-off devices 150 can be controlled by the same controller 140, and information from the temperature sensors 130 and shut-off devices 150 can be obtained. This reduces the number of controllers 140, which helps to reduce the cost of the junction box assembly 100. In addition, the output of the photovoltaic cell string group 200 can be turned on or off by turning on or off the same shut-off device 150. This reduces the number of shut-off devices 150, which helps to further reduce the cost of the junction box assembly 100.

[0045] See Figure 1 For example, controller 140 is configured to disconnect the first terminal 151 and the second terminal 152 to disconnect the switch 150, thereby stopping the output of the photovoltaic cell string group 200. Alternatively, controller 140 is configured to connect the first terminal 151 and the second terminal 152 to connect the switch 150, thereby turning on the output of the photovoltaic cell string group 200.

[0046] See Figure 1 As shown in the figure, in some embodiments, the multiple junction boxes 120 include a first junction box 121 and a second junction box 122. The controller 140 and the shut-off device 150 are both disposed in the first junction box 121 or the second junction box 122. In this way, the controller 140 and the shut-off device 150 are both disposed in the same junction box 120, which is beneficial to improve the integration of the junction box 120 in which the controller 140 and the shut-off device 150 are disposed. It can also make the distance between the controller 140 and the shut-off device 150 closer, which is beneficial to simplify the wiring of the junction box assembly 100.

[0047] See Figure 3 and Figure 4 In other embodiments, one of the controller 140 and the switch 150 is disposed in the first junction box 121, and the other of the controller 140 and the switch 150 is disposed in the second junction box 122. In this way, the controller 140 and the switch 150 are disposed in two different junction boxes 120, so that the controller 140 and the switch 150 occupy a small volume in their respective junction boxes 120, so as to facilitate the placement of other electronic devices in the respective junction boxes 120.

[0048] See Figure 1Multiple junction boxes 120 include a first junction box 121, in which the controller 140 and the shut-off device 150 are both disposed. In this way, integrating the controller 140 and the shut-off device 150 into the first junction box 121 can improve the integration of the first junction box 121 and make the distance between the controller 140 and the shut-off device 150 closer, which is beneficial to simplifying the wiring of the junction box assembly 100.

[0049] See Figure 1 In some embodiments, the junction box assembly 100 includes a first external terminal 171 and a second external terminal 172, which are used to realize the electrical connection between the junction box assembly 100 and an external circuit.

[0050] See Figure 1 In some embodiments, the plurality of junction boxes 120 includes a first junction box 121, on which a first external terminal 171 is mounted, and the first external terminal 171 is used for electrical connection with the first electrode of the photovoltaic cell string group 200. The plurality of junction boxes 120 also includes a second junction box 122, on which a second external terminal 172 is mounted, and the second external terminal 172 is used for electrical connection with the second electrode of the photovoltaic cell string group 200. Wherein, one of the first electrode and the second electrode of the photovoltaic cell string group 200 is a positive electrode, and the other is a negative electrode. The first electrode is positive and the second electrode is negative. Alternatively, the second electrode is positive and the first electrode is negative. This application embodiment uses an example where the first electrode is positive (C) and the second electrode is negative (D) for illustration.

[0051] See Figure 1 In the embodiment where the circuit breaker 150 is located in the first junction box 121, the first external terminal 171 is electrically connected to the first terminal 151 of the circuit breaker 150, and the first electrode (e.g., the positive electrode C) of the photovoltaic cell string 200 is electrically connected to the second terminal 152 of the circuit breaker 150. Thus, the circuit breaker 150 is connected between the first external terminal 171 and the positive electrode C of the photovoltaic cell string 200. The circuit breaker 150 can switch the connection between the first external terminal 171 and the positive electrode C of the photovoltaic cell string 200, thereby enabling or disabling the power output of the photovoltaic cell string 200. The second external terminal 172 can be directly electrically connected to the negative electrode D of the photovoltaic cell string 200 via a wiring connection.

[0052] See Figure 2In the embodiment where the circuit breaker 150 is located in the second junction box 122, the second external terminal 172 is electrically connected to the first terminal 151 of the circuit breaker 150, and the second electrode (e.g., the negative electrode D) of the photovoltaic cell string 200 is electrically connected to the second terminal 152 of the circuit breaker 150. Thus, the circuit breaker 150 is connected between the second external terminal 172 and the negative electrode D of the photovoltaic cell string 200. The circuit breaker 150 can switch the connection between the second external terminal 172 and the negative electrode D of the photovoltaic cell string 200, thereby enabling or disabling the power output of the photovoltaic cell string 200. The first external terminal 171 and the positive electrode C of the photovoltaic cell string 200 can be directly electrically connected via wiring.

[0053] In some embodiments, the positive terminal A of the controller 140 is directly electrically connected to the positive terminal C of the photovoltaic cell string 200 via a wiring, so that the positive terminal C of the photovoltaic cell string 200 can directly supply power to the positive terminal A of the controller 140 via the wiring. In this case, no switch 150 is provided between the positive terminal C of the photovoltaic cell string 200 and the positive terminal A of the controller 140.

[0054] In some embodiments, the negative terminal B of the controller 140 is directly electrically connected to the negative terminal D of the photovoltaic cell string 200 via a wiring, so that the negative terminal D of the photovoltaic cell string 200 can directly supply power to the negative terminal B of the controller 140 via the wiring. In this case, no shutdown device 150 is provided between the negative terminal D of the photovoltaic cell string 200 and the negative terminal B of the controller 140.

[0055] See Figure 1 and Figure 4 In the embodiment where the circuit breaker 150 is located in the first junction box 121, the positive terminal A of the controller 140 is electrically connected to the second terminal 152 of the circuit breaker 150 and the positive terminal C of the photovoltaic cell string 200. Thus, even when the circuit breaker 150 is in the off state, the positive terminal C of the photovoltaic cell string 200 can still supply power to the positive terminal A of the controller 140, so that the working state of the circuit breaker 150 will not affect the power supply to the positive terminal A of the controller 140.

[0056] See Figure 2 and Figure 3 In the embodiment where the circuit breaker 150 is located in the second junction box 122, the negative terminal B of the controller 140 is electrically connected to the second terminal 152 of the circuit breaker 150 and the negative terminal D of the photovoltaic cell string 200. Thus, even when the circuit breaker 150 is in the off state, the negative terminal D of the photovoltaic cell string 200 can supply power to the negative terminal B of the controller 140, so that the working state of the circuit breaker 150 will not affect the power supply to the negative terminal B of the controller 140.

[0057] See Figure 1In some embodiments, the junction box assembly 100 includes a first conductive line 181. The negative terminal B of the controller 140 is electrically connected to the negative terminal D of the photovoltaic cell string group 200 through the first conductive line 181. Thus, the operating state of the switch 150 will not affect the power supply to the negative terminal B of the controller 140, and the negative terminal D of the photovoltaic cell string group 200 can continuously supply power to the negative terminal B of the controller 140. When the controller 140 can directly draw power from the photovoltaic cell string group 200 without being affected by the shutdown of the switch 150, the monitoring function of the junction box assembly 100 can be ensured to remain uninterrupted, avoiding safety hazards caused by monitoring failure.

[0058] See Figure 1 In some embodiments, there is only one first conductive line 181. The negative electrode E of at least one temperature sensor 130 is electrically connected to the negative electrode B of the controller 140 through the first conductive line 181. Thus, the negative electrode E of at least one temperature sensor 130 and the negative electrode D of the photovoltaic cell string 200 are electrically connected to the negative electrode B of the controller 140 using the same first conductive line 181. The first conductive line 181 can be used to supply power to the negative electrode B of the controller 140 and can also serve as a reference ground for the negative electrode E of the temperature sensor 130. This simplifies the wiring of the junction box assembly 100 and reduces manufacturing costs.

[0059] For example, the negative electrode E of each temperature sensor 130 is electrically connected to the negative electrode B of the controller 140 through the first conductive line 181, which can better simplify the wiring of the junction box assembly 100 and reduce the manufacturing cost.

[0060] See Figure 1 In some embodiments, the junction box assembly 100 includes a communication module 160, which is coupled to the controller 140 and can be electrically connected to the controller 140. The communication module 160 includes a power line communication (PLC) communication module. In this way, the controller 140 can communicate with external devices through the communication module 160. Compared with related technologies that use wireless communication modules to realize communication between the controller and external devices, this application uses a power line communication module, which has lower power consumption and lower cost.

[0061] For example, controller 140 can transmit data (e.g., data including temperature, voltage, current, device status, etc.) to external devices via communication module 160. Controller 140 can also receive control commands or heartbeat signals from external devices via communication module 160. When a control command requires shutdown or the heartbeat signal disappears, controller 140 controls shutdown device 150 to disconnect, causing the photovoltaic cell string group 200 to have no output.

[0062] In some embodiments, the communication module 160 and the controller 140 may be integrated on the same circuit board, and the communication module 160 and the controller 140 may be in the same junction box 120.

[0063] See Figure 1 In some embodiments, the first signal terminal of the communication module 160 is coupled to the first external terminal 171, and the second signal terminal of the communication module 160 is coupled to the second external terminal 172. In this way, the communication module 160 is coupled to the first external terminal 171 and the second external terminal 172 to realize communication with external devices without the need for additional hardware (e.g., no need for additional wireless communication modules), which helps to reduce the cost of the junction box assembly 100.

[0064] In some embodiments, the positive terminal of the communication module 160 is electrically connected to the second terminal 152 of the switch 150 and the positive terminal C of the photovoltaic cell string 200 through the controller 140. In this way, the working state of the switch 150 will not affect the power supply to the positive terminal of the communication module 160, and the positive terminal C of the photovoltaic cell string 200 can continuously supply power to the positive terminal of the communication module 160.

[0065] In some embodiments, the negative terminal of the communication module 160 is electrically connected to the negative terminal D of the photovoltaic cell string 200 via the controller 140. This ensures that the operation of the switch 150 does not affect the power supply to the negative terminal of the communication module 160, allowing the negative terminal D of the photovoltaic cell string 200 to continuously supply power to the negative terminal of the communication module 160. When the operation of the switch 150 does not affect the power supply to the positive and negative terminals of the communication module 160, even if the switch 150 is disconnected, communication between the control junction box assembly 100 and external devices remains uninterrupted.

[0066] In some embodiments, the controller 140 includes at least one of a voltage sampling module and a current sampling module, thereby enabling sampling and monitoring of at least one of the current (e.g., total current) and voltage (e.g., total voltage) of the photovoltaic cell string group 200. The junction box assembly 100 can monitor the voltage, current, and temperature of the photovoltaic cell string group 200 in real time, allowing for real-time assessment of the health status of the photovoltaic cell string group 200.

[0067] For example, when the temperature of the photovoltaic cell string 200 is greater than or equal to a preset temperature, the current is greater than or equal to a preset current, and the voltage is greater than or equal to a preset voltage, the controller 140 can control the shut-off device 150 to disconnect the first terminal 151 and the second terminal 152, so that the output of the photovoltaic cell string 200 stops. This can prevent the photovoltaic cell string 200 from catching fire, improve the safety of the photovoltaic cell string 200, and also avoid the formation of high voltage.

[0068] See Figure 1In some embodiments, the multiple junction boxes 120 include a third junction box 123, which does not directly participate in the switching on and off of the main power circuit. The main power circuit may include a photovoltaic cell string group 200, a circuit breaker 150, a first external terminal 171, and a second external terminal 172.

[0069] For example, the number of third junction boxes 123 can be at least one. The number of third junction boxes 123 can be any number of 1, 2, 3 or more.

[0070] For example, there is one first junction box 121 and one second junction box 122.

[0071] In some embodiments, each junction box 120 is provided with a diode 182, which can be connected in parallel with the corresponding photovoltaic cell string 210. In this way, by providing the diode 182, the impact of hot spot effect on the power generation of the photovoltaic cell string group 200 can be reduced.

[0072] In some embodiments, any two of the first junction box 121, the second junction box 122, and the third junction box 123 have the same volume.

[0073] In other embodiments, the volume of the first junction box 121 is larger than the volume of the second junction box 122, and the volume of the second junction box 122 is larger than the volume of the third junction box 123. In this way, the three junction boxes can be quickly identified by the difference in their volumes, thereby reducing the assembly difficulty of the three junction boxes.

[0074] The photovoltaic module 10 provided in the embodiments of this application will be described below.

[0075] This application provides a photovoltaic module 10, which includes a photovoltaic cell string group 200 and a junction box assembly 100 as described in the above embodiments.

[0076] For example, the photovoltaic cell string group 200 may include at least one photovoltaic cell string 210. The number of photovoltaic cell strings 210 can be any number of 1, 2, 3 or more.

[0077] For example, there are multiple photovoltaic cell strings 210, and any two photovoltaic cell strings 210 can be connected in series or in parallel. This application embodiment uses multiple photovoltaic cell strings 210 connected in series as an example for illustration.

[0078] In some embodiments, the same photovoltaic cell string 210 may include multiple photovoltaic cells 211, and the multiple photovoltaic cells 211 may be connected in series.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A junction box assembly, characterized in that, For use in photovoltaic modules, the photovoltaic modules including photovoltaic cell strings, the photovoltaic cell strings including multiple photovoltaic cell strings; the junction box assembly includes: Multiple junction boxes are provided corresponding to the multiple photovoltaic cell strings, and the junction boxes are electrically connected to the corresponding photovoltaic cell strings; at least one of the junction boxes includes a temperature sensor. The junction box assembly includes a controller and a shut-off device, and the temperature sensor and the shut-off device of each junction box are electrically connected to the controller.

2. The junction box assembly according to claim 1, characterized in that, The junction box assembly includes a first external terminal, the plurality of junction boxes include the first junction box, the first external terminal is mounted on the first junction box, the first external terminal is electrically connected to the first terminal of the switch, the positive terminal of the photovoltaic cell string is electrically connected to the second terminal of the switch, and the switch is configured to disconnect or connect the first terminal and the second terminal.

3. The junction box assembly according to claim 2, characterized in that, The positive terminal of the controller is electrically connected to the second terminal of the switch and the positive terminal of the photovoltaic cell string.

4. The junction box assembly according to any one of claims 1-3, characterized in that, The junction box assembly includes a second external terminal, and the plurality of junction boxes include a second junction box. The second external terminal is mounted on the second junction box and is electrically connected to the negative terminal of the photovoltaic cell string.

5. The junction box assembly according to any one of claims 1-3, characterized in that, The junction box assembly includes a first conductive wire, and the negative terminal of the controller is electrically connected to the negative terminal of the photovoltaic cell string through the first conductive wire.

6. The junction box assembly according to claim 5, characterized in that, The number of the first conductive wires is one, and at least one of the negative terminals of the temperature sensor is electrically connected to the negative terminal of the controller through the first conductive wire.

7. The junction box assembly according to any one of claims 1-3, characterized in that, The junction box assembly includes a communication module, which is coupled to the controller. The communication module includes a power line carrier communication module.

8. The junction box assembly according to claim 7, characterized in that, The positive terminal of the communication module is electrically connected to the second terminal of the switch and the positive terminal of the photovoltaic cell string via the controller; and / or, The negative terminal of the communication module is electrically connected to the negative terminal of the photovoltaic cell string via the controller; and / or, The junction box assembly includes a first external terminal, and a first signal terminal of the communication module is coupled to the first external terminal; and / or, The junction box assembly includes a second external terminal, and the second signal terminal of the communication module is coupled to the second external terminal.

9. The junction box assembly according to any one of claims 1-3, characterized in that, The controller includes at least one of a voltage sampling module and a current sampling module.

10. The junction box assembly according to claim 2 or 3, characterized in that, Both the controller and the shut-off device are located in the first junction box.

11. A photovoltaic module, characterized in that, Includes photovoltaic cell strings and junction box assemblies as described in any one of claims 1-10.

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