A terminal block and a temperature control method thereof

Abstract

The application relates to a terminal block and a temperature control method thereof, and relates to the technical field of electrical safety. The terminal block comprises a shell and at least one terminal part arranged in the shell. The terminal part is provided with a lap joint area for external wires. A temperature acquisition module is arranged in the shell and corresponds to the lap joint area and is arranged below the lap joint area. Based on the structure, the method firstly performs self-checking on the temperature acquisition module to ensure data reliability, and then performs multi-stage intelligent monitoring, including rapid protection cut-off of a first power-on rapid temperature rise and a limit temperature, and long-term degradation early warning based on a combination of multiple conditions such as a temperature value, an adjacent temperature difference, a temperature rise speed, a temperature current correlation deviation and the like. Through the combination of hardware integration and software strategy, the application solves the problems of missing installation and space occupation of an external sensor, and improves the accuracy, reliability and early warning capability for hidden faults of temperature monitoring.

Description

Technical Field

[0001] This application relates to the field of electrical safety technology, and in particular to a terminal block and its temperature control method. Background Technology

[0002] As a critical component of electrical connections, the reliability of through-wall OT terminal blocks directly affects electrical safety. In actual use, insufficient installation torque or loosening due to prolonged current heating can increase the contact resistance between the wire and the terminal nut, causing continuous heating, abnormally high temperatures at the connection point, and even fire, posing a serious safety hazard.

[0003] To address the aforementioned issues, in addition to preventative measures such as torque control during installation, the industry has proposed a monitoring solution involving temperature sensors at conductive overlaps. Existing solutions primarily involve stacking an NTC (Negative Temperature Coefficient) temperature sensing cable with an independent OT terminal alongside the terminals of the main circuit power cable, securing them together to the terminal block. However, this external stacking method has inherent drawbacks: the sensor, as an independent component, is easily overlooked during field installation, leading to monitoring failure; furthermore, it occupies valuable wiring space, increases wiring complexity, hinders the implementation of high-density, compact electrical cabinet layouts, and may affect the operation and heat dissipation of adjacent terminals.

[0004] In addition to the aforementioned difficulties in physical integration, the strategies for utilizing temperature data also have limitations. Since the sensor is simply attached to the connection point, the uncertainty of its installation location leads to a discrepancy between the measured temperature and the actual heating at the connection point, resulting in insufficient data reliability. Based on this, existing monitoring strategies struggle to effectively detect over-temperature conditions, suffer from high false alarm rates, and cannot identify and warn of progressive degradation faults caused by a slow increase in contact resistance through correlation analysis of temperature data from multiple monitoring points. Summary of the Invention

[0005] To address the problems of complex installation, easy omission, and additional wiring space required for temperature sensors in existing technologies, as well as the high false alarm rate and inability to effectively warn of contact point failures in existing monitoring strategies, this application provides a terminal block and its temperature control method.

[0006] The technical solution of the terminal block and its temperature control method provided in this application is as follows: A junction box includes a housing and at least one wiring portion disposed within the housing. The wiring portion has an overlap area for connecting external wires. A temperature acquisition module is disposed within the housing, corresponding to the overlap area and located below the overlap area.

[0007] By adopting the above technical solution, the temperature acquisition module is built into the housing and positioned directly below the most heat-prone overlapping area of ​​the wiring section, achieving the shortest-distance thermal coupling between the temperature acquisition module and the heat source. This eliminates the installation space and operation required for external sensors, prevents the possibility of omissions, and can quickly and accurately capture abnormal temperature rises caused by increased contact resistance. This provides a structural basis for real-time online temperature monitoring and overheat alarms, fundamentally improving the active safety protection capability of the wiring terminal.

[0008] In one specific implementation, the temperature acquisition module is integrated with the housing.

[0009] By adopting the above technical solution and utilizing an integrated design, the temperature acquisition module and the housing are highly integrated in physical structure, forming a tight whole. This not only eliminates the gaps and uncertainties caused by the independent installation of the temperature acquisition module and ensures the accuracy and stability of the relative position between the temperature acquisition module and the wiring part, but also simplifies the product structure and improves the integration and reliability of the overall structure.

[0010] In one specific implementation, the temperature acquisition module is covered with an insulating structure and fixed inside the housing by the insulating structure.

[0011] By adopting the above technical solution, a flexible and reliable integration solution is provided by fixing the temperature acquisition module with an insulating structure. This insulating structure not only ensures that the temperature acquisition module is firmly fixed, but also builds a reliable insulating barrier between the temperature acquisition module and the wiring overlap area, realizing insulation safety protection between the temperature acquisition module and the conductive overlap area, and ensuring electrical safety.

[0012] In one specific implementation, the wiring section is provided in multiple ways, including one or more of the phase wire wiring section, neutral wire wiring section, and ground wire wiring section.

[0013] By adopting the above technical solution, this limitation clarifies that this application can be applied to various standardized terminal block products containing different functional wiring parts (such as single-phase and three-phase grounded wires), expanding the application scope of the terminal block of this application, enabling it to cover most scenarios in power connection that require temperature monitoring.

[0014] In one specific implementation, the temperature acquisition module is provided at least below the overlapping area of ​​the phase wire connection and the neutral wire connection, respectively.

[0015] By adopting the above technical solution, the phase line and neutral line are the main conductors that carry the working current, and their connection points have the highest risk of overheating. By specifically setting up temperature acquisition modules below the overlapping area of ​​these two key parts, the most economical and effective way can be used to accurately monitor the most important safety hazards, achieving the best balance between cost and safety.

[0016] In one specific implementation, the temperature acquisition module is connected to a signal lead that extends outside the housing for connection to an external control system.

[0017] By adopting the above technical solution, the signal lead of the temperature acquisition module extends to the outside of the housing, forming a channel for transmitting temperature information to the outside world. This enables the real-time temperature data of the terminal block to be received and processed by the external control system, realizing a functional closed loop from temperature sensing to intelligent decision-making and protection.

[0018] In one specific implementation, the wiring portion is provided in multiple ways, and each of the multiple overlapping areas is provided with a fixing hole. The fixing hole is used to fix the connection terminal of the wire, and the multiple fixing holes are distributed in a fan shape on the housing.

[0019] By adopting the above technical solution, the fixing holes of multiple wiring terminals are distributed in a fan shape on the housing, which makes the direction of the access cables naturally converge and the path smooth, greatly reducing the bending stress of the cables and facilitating the uniform stripping length. This optimized layout not only simplifies the installation, but also promotes the physical stability of the electrical connection and reduces the risk of hidden loosening caused by installation stress or irregular bending. This provides a more stable and reliable monitoring foundation for the monitoring function of the built-in temperature acquisition module. The two work together to improve the overall electrical safety of the system.

[0020] In one specific implementation, the plurality of the wiring portions are arranged in at least one layer on the housing, and the plurality of the fixing holes on each layer are distributed in a fan shape; Furthermore, the mounting planes of the wiring portions on different layers are also distributed in a fan shape on the projection plane perpendicular to the layer arrangement direction.

[0021] By adopting the above technical solution, and by setting up multi-layer wiring sections with a fan-shaped distribution on each layer and in the projection, the wiring density and space utilization are greatly improved in a limited space. This three-dimensional fan-shaped layout ensures that the cables on each layer can obtain optimized path planning in their wiring plane and in the inter-layer direction, effectively reducing cable crossings, interference, and stress concentration. The orderly wiring environment not only facilitates heat dissipation and maintenance, but also fundamentally reduces the risk of local overheating caused by messy wiring, enabling the built-in temperature acquisition module to more accurately reflect the temperature rise of the connection point itself, improving the effectiveness of monitoring and the accuracy of alarms.

[0022] A temperature control method for a terminal block as described above, comprising: Obtain the temperature value of the overlapping area collected by the temperature acquisition module; Based on the temperature value, a protective action is performed.

[0023] By adopting the above technical solution, this method constructs a basic control logic framework of "acquisition, decision-making, and execution". The temperature value of the overlapping area measured by the temperature acquisition module built into the terminal block is the core basis to drive the triggering of protection actions. This simple and complete control loop transforms the in-situ temperature monitoring capability provided by the aforementioned structural innovation into a substantial safety protection function, realizing a leap from passive monitoring to active protection.

[0024] In one specific implementation scheme, based on the temperature value, the protective action is performed, including: If, within the first preset time period after the terminal block is first powered on, the temperature rise rate of any of the temperature acquisition modules exceeds the first threshold, then a current-cutting protection action is executed. Alternatively, if the temperature value acquired by any of the temperature acquisition modules is greater than the second threshold, a current-cutting protection action is performed.

[0025] By adopting the above technical solution, this method sets up a rapid protection mechanism for two typical high-risk scenarios: First, to address the potential torque deficiency problem at the installation site, by monitoring the temperature rise rate after the first power-on, it can immediately identify and cut off the circuit to prevent the fault from worsening; Second, as a safety fallback, by monitoring the absolute temperature threshold, it ensures that the material's tolerance limit will not be exceeded under any abnormal conditions; These two protections together constitute a rapid response capability to instantaneous severe faults.

[0026] In one specific implementation scheme, after obtaining the temperature value of the overlapping area collected by the temperature acquisition module, the method further includes: The system acquires the current value flowing through each of the wiring terminals at the current temperature, the temperature difference between two adjacent overlapping areas, and the temperature rise rate of the temperature values ​​acquired by the temperature acquisition module within a second preset time period. Based on the temperature values ​​collected by each of the temperature acquisition modules, the temperature difference between two adjacent overlapping areas, the temperature rise rate of the temperature values ​​collected by the temperature acquisition modules within a second preset time period, and the current value flowing through each of the wiring terminals at the current temperature, a protection action is performed.

[0027] By adopting the above technical solution, this method introduces three new data dimensions on top of basic temperature monitoring: temperature difference between adjacent overlapping areas, temperature rise rate over a specific period, and the correlation between temperature and current. As a result, the protection logic expands from a single temperature threshold judgment to a comprehensive consideration of multiple characteristics such as the uniformity of temperature field distribution, dynamic thermal change trends, and the matching degree between load and thermal response, providing a richer and more comprehensive data foundation for subsequent more accurate and intelligent protection decisions.

[0028] In one specific implementation scheme, based on the temperature values ​​collected by each of the temperature acquisition modules, the temperature difference between two adjacent overlapping areas, the temperature rise rate of the temperature values ​​collected by the temperature acquisition modules within a second preset time period, and the current value flowing through each of the wiring terminals at the current temperature, a protection action is performed, including: The current-cutting protection action is performed if at least two of the following conditions are met simultaneously; if only one of the following conditions is met, an alarm signal is triggered. The conditions include: The temperature value acquired by any of the temperature acquisition modules is greater than the third threshold and less than the second threshold; The temperature difference between two adjacent overlapping areas is greater than the fourth threshold. The difference between the current value flowing through each of the aforementioned terminals and the preset reference current value corresponding to the current temperature is greater than the fifth threshold. Within the second preset time period, the rate of temperature rise of the temperature values ​​collected by the temperature acquisition module is greater than the sixth threshold.

[0029] By adopting the above technical solution, this method constructs a multi-dimensional combined judgment intelligent logic containing four dimensions. Among them, the temperature value condition is set within the range of being greater than or equal to the third threshold and less than the second threshold, ensuring that the logic focuses on identifying slow degradation processes that have deviated from normal but have not triggered rapid protection. Through cross-validation with three dimensions—temperature field dispersion, current and temperature correlation, and dynamic temperature rise rate—the protection is only executed when at least two dimensions are abnormal simultaneously, effectively avoiding false actions caused by single-factor occasional fluctuations. When only a single dimension is abnormal, an alarm is issued, realizing early warning of potential risks. This design greatly improves the accuracy and intelligence level of protection, and is especially suitable for the early identification of hidden faults such as slow increase in contact resistance.

[0030] In one specific implementation, before acquiring the temperature value of the overlapping area collected by the temperature acquisition module, the method further includes: Perform a self-test on each of the temperature acquisition modules, mark the temperature acquisition modules that fail the self-test as invalid, and mark the others as valid; Obtaining the temperature value of the overlapping area collected by the temperature acquisition module includes: obtaining the temperature value of the overlapping area collected by the temperature acquisition module that is marked as valid.

[0031] By adopting the above technical solution, this method first performs a self-check on the temperature acquisition module before executing any protection judgment, and marks abnormal sensors as invalid. This pre-quality inspection step ensures that the data source on which all subsequent protection decisions are based is real and reliable, fundamentally eliminating false alarms or missed alarms caused by sensor failure or drift, and is the fundamental guarantee for the reliable operation of the entire intelligent monitoring method.

[0032] In summary, the beneficial technical effects of this application are as follows: by embedding the temperature acquisition module in the housing and accurately positioning it directly below the junction area of ​​the wiring part, the shortest distance thermal coupling between the sensor and the heating point is achieved, completely eliminating the installation space and operation required for external sensors, eliminating the risk of missing installation from the source, and ensuring rapid and accurate capture of abnormal temperature rise with an extremely short heat conduction path, thus upgrading the traditional junction box into an intelligent sensing node with in-situ monitoring capabilities. Based on the above, this application further designs a temperature control method and constructs an intelligent control strategy with a self-testing mechanism as a prerequisite and graded protection as the core logic: by monitoring the initial power-on temperature rise rate and judging the extreme temperature threshold, it realizes the rapid interception of instantaneous faults such as insufficient installation torque; by introducing a combination of four dimensions of judgment, namely temperature value, adjacent temperature difference, temperature rise rate, and temperature-current correlation deviation, it can accurately identify hidden deterioration trends such as slow increase in contact resistance, and effectively avoid malfunctions caused by occasional fluctuations of single factors. Structural innovation provides accurate and reliable data sources for intelligent monitoring, while methodological innovation transforms data into substantive protection decisions. The two complement each other, jointly upgrading traditional terminal blocks into electrical safety units with proactive early warning and intelligent protection capabilities, fundamentally improving the overall reliability and safety of power connection systems. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the terminal block structure according to an embodiment of this application.

[0034] Figure 2 It is a cross-sectional view used to show the positional relationship between the temperature acquisition module and the overlapping area.

[0035] Figure 3 It is a cross-sectional view used to show the temperature acquisition module and wiring.

[0036] Figure 4 This is a schematic diagram illustrating the structure of a terminal block with two layers of wiring.

[0037] Figure 5It is a cross-sectional view used to show the internal structure of the two-layer wiring section.

[0038] Figure 6 It is a cross-sectional view used to show the temperature acquisition module and the potting layer.

[0039] Figure 7 It is a cross-sectional view used to show the temperature acquisition module and the insulating sleeve.

[0040] Figure 8 It is a schematic diagram used to show the structure in which the fixing holes on the overlapping area are distributed in a fan shape.

[0041] Figure 9 This is a schematic diagram illustrating the fan-shaped distribution of wiring sections on different layers.

[0042] Figure 10 This is a flowchart used to demonstrate the terminal block temperature control method.

[0043] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Receiving cavity; 2. Wiring section; 21. Phase wire wiring section; 22. Neutral wire wiring section; 23. Ground wire wiring section; 3. Overlapping area; 31. Fixing hole; 4. Temperature acquisition module; 5. Insulation structure; 51. Potting layer; 52. Insulating sleeve; 6. Signal lead. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0045] The core concept of this application lies in proposing a built-in temperature monitoring solution to address the problem of overheating caused by loose connections in traditional terminal blocks, which prevents real-time monitoring. This solution directly integrates the temperature sensing element into the terminal block's housing, placing its sensing part directly beneath the most heat-prone part of the conductive component. This achieves integrated temperature measurement and heat-generating unit integration and shortest-path thermal coupling at the source. Based on this structural innovation, a multi-level intelligent judgment strategy is further proposed. Through a combination of source self-inspection, rapid protection, and multi-dimensional intelligent analysis, it achieves comprehensive proactive safety protection, from rapid disconnection of instantaneous faults to early warning of long-term hidden dangers.

[0046] Reference Figure 1 and Figure 2 This application discloses a terminal block, including a housing 1 and at least one wiring portion 2 disposed within the housing 1. In this embodiment, the housing 1 is injection molded from an insulating material (such as engineering plastic), and the wiring portion 2 is a metal conductive busbar (such as a copper busbar or an aluminum busbar), which has an overlap area 3 for mechanical connection and electrical conduction with an external conductor. The core of the external conductor is tightened by screws or snapped into this overlap area 3 to complete the current transmission.

[0047] Reference Figure 2 and Figure 3 Inside the housing 1, a temperature acquisition module 4 is provided corresponding to the aforementioned heat-generating overlapping area 3. Specifically, the spatial position of the temperature acquisition module 4 is configured such that it is directly opposite the overlapping area 3 of the wiring part 2 on the horizontal plane, and located below the overlapping area 3 in the vertical direction. This close proximity below is the core of this application to achieve efficient and accurate temperature measurement. By embedding the temperature acquisition module 4 in the housing 1 and positioning it directly below the heat source, all external installation steps are eliminated, the possibility of missing installation is eliminated, and the shortest heat conduction path is used to ensure that any abnormal temperature rise caused by increased contact resistance can be quickly and accurately detected.

[0048] To enable the external transmission of temperature signals, the temperature acquisition module 4 is connected to a signal lead 6. The signal lead 6 is properly routed inside the housing 1 and extends to the outside of the housing 1 so as to connect to an external control system (such as a PLC or smart gateway). In this embodiment, to ensure the overall sealing of the terminal block, especially in a humid environment, the opening on the housing 1 through which the signal lead 6 passes is preferably provided with a waterproof sealing structure, such as a rubber sealing plug, potting compound, or waterproof gland.

[0049] Reference Figure 1-5 This application can be flexibly applied to various standardized terminal block products with different numbers of wiring sections 2. The wiring section 2 can be configured as multiple, and common combinations include one or more of the phase wire wiring section 21 (external L phase wire), neutral wire wiring section 22 (external N phase wire), and ground wire wiring section 23 (external PE phase wire); this clarifies that this application can cover various application scenarios from simple single phase to complex three phase.

[0050] In a specific application example, refer to Figure 1-3 For a 3-pin connector with only one layer of wiring section 2, it includes a phase wire wiring section 21 (for external L phase wire), a neutral wire wiring section 22 (for external N phase wire), and a ground wire wiring section 23 (for external PE phase wire). At least below the overlapping area 3 of the phase wire wiring section 21 and the neutral wire wiring section 22, a temperature acquisition module 4 is respectively provided. This is because the phase wire and the neutral wire are the main paths carrying the working current, and their connection points have the highest risk of overheating, making their monitoring the safest and most economical. Since the ground wire wiring section 23 usually does not carry the working current, a temperature acquisition module 4 can be omitted below it to optimize cost and structure. This solution enables the native temperature monitoring capability of key points while maintaining the compact shape and wiring habits of the traditional 3-pin connector, without any external modification or additional space occupation.

[0051] In another specific application example, refer to Figure 4 and Figure 5For a 5PIN terminal block with two layers of wiring sections 2, it includes three phase wiring sections 21 (for external connection of phase lines L1, L2, and L3 respectively), one neutral wiring section 22 (for external connection of phase line N), and one ground wiring section 23 (for external connection of phase line PE). Similarly, a temperature acquisition module 4 is provided below the overlapping area 3 of each phase wiring section 21 and neutral wiring section 22 to achieve comprehensive temperature monitoring of all current-carrying conductors. The ground wiring section 23 can also be omitted. This distributed temperature monitoring layout for all current-carrying conductors (four points in total) can effectively cope with various abnormal operating conditions such as load imbalance, harmonics, or single-phase overload that may exist in a three-phase system, providing more comprehensive and blind-spot-free safety protection.

[0052] It should be noted that the physical installation arrangement of the phase wire connection part 21 and the neutral wire connection part 22 inside the housing 1 can be varied according to the specific product design requirements, such as single-layer arrangement, double-layer staggered arrangement, etc., and is not strictly limited to the specific arrangement shown in the figure. The technical concept of this application can also be extended to terminal block products with 1PIN, 2PIN, 4PIN, 6PIN or even more PINs. Its core is to set the built-in temperature acquisition module 4 below the overlapping area 3 of the connection part 2 (usually the phase wire connection part 21 and the neutral wire connection part 22) that needs to monitor the current path.

[0053] In one specific embodiment, the temperature acquisition module 4 uses a negative temperature coefficient thermistor (NTC). NTC elements have a stable characteristic that the resistance value decreases significantly and regularly as the temperature rises. This allows the temperature at the location to be deduced with high accuracy by measuring the change in resistance value through a simple circuit. The technology is mature and inexpensive.

[0054] Reference Figure 2 and Figure 3 In one specific embodiment, the temperature acquisition module 4 is integrated with the housing 1; including but not limited to, through in-mold injection molding: before injection molding the housing 1, the temperature acquisition module 4 and the wiring part 2 are accurately placed as pre-placed parts in the mold cavity, so that the temperature sensing part of the temperature acquisition module 4 is located at a preset position directly below the corresponding overlapping area 3; after the molten plastic is injected and cooled, the two are encapsulated and solidified at one time; this integrated design makes the temperature acquisition module 4 and the housing 1 physically combined into a tight whole, eliminating the gaps and uncertainties of independent installation, ensuring the accuracy and stability of the relative position between the temperature sensing part of the temperature acquisition module 4 and the heating point wiring part 2, and improving the overall structure, reliability and production efficiency.

[0055] Reference Figure 6 and Figure 7In another specific embodiment, the temperature acquisition module 4 is covered with an insulating structure 5 and fixed inside the housing 1 by the insulating structure 5. In this embodiment, the insulating structure 5 includes, but is not limited to, a potting layer 51, an insulating sleeve 52, and a combination of the potting layer 51 and the insulating sleeve 52. The potting layer 51 can be formed by curing an insulating and thermally conductive adhesive such as epoxy resin or silicone rubber. The insulating sleeve 52 can be made of a thin-walled, high-temperature resistant, and high-insulation-strength material such as polyimide film or Teflon tube. This insulating structure not only ensures that the temperature acquisition module 4 is firmly fixed, but also builds a reliable insulating barrier between the temperature acquisition module 4 and the live contact area 3 of the wiring part 2, realizing the insulation safety protection between the temperature acquisition module 4 and the conductive contact area 3, and ensuring electrical safety.

[0056] This solution is applicable when the housing 1 is first injection molded. The specific process can be as follows: corresponding to the predetermined installation position of each temperature acquisition module 4, an independent accommodating cavity 11 is processed or pre-formed inside the housing 1. For the potting fixation method, during assembly, the temperature acquisition module 4 is first accurately placed in its respective accommodating cavity 11, and then insulating and thermally conductive adhesive is poured into the accommodating cavity 11 until it completely covers the module. After the adhesive cures, it forms a potting layer 51 that wraps around and fixes the temperature acquisition module 4. The potting layer 51 firmly bonds the temperature acquisition module 4 to the cavity wall of the accommodating cavity 11, while filling all the gaps between the module and the cavity wall. After the potting layer 51 is cured, it achieves reliable mechanical fixation and effectively prevents module displacement; at the same time, it forms a reliable insulation barrier; in addition, the selected insulating thermally conductive adhesive generally has better thermal conductivity than air and shell plastic, and the potting layer 51 can also serve as an optimized heat conduction medium to transfer heat to the temperature sensing part of the temperature acquisition module 4 more efficiently, thereby improving the temperature measurement response speed.

[0057] Regarding the assembly method of the insulating sleeve 52, before assembly, the insulating sleeve 52 is tightly fitted onto the outside of the temperature acquisition module 4; inside the housing 1, corresponding to each temperature acquisition module 4 fitted with the insulating sleeve 52, there is a prefabricated independent receiving cavity 11 with matching shape and size. The receiving cavity 11 can be a blind hole or groove with a guide opening; during assembly, the temperature acquisition module 4 with the insulating sleeve 52 fitted is pressed or pushed into the corresponding receiving cavity 11 along the guide opening, and the tight fit is achieved by the interference fit between the outer wall of the insulating sleeve 52 and the inner wall of the receiving cavity 11; the insulating sleeve 52 plays a basic role in electrical insulation and protection; this assembly method is flexible in production and assembly process, facilitates subsequent testing or replacement of the temperature acquisition module 4, and improves the maintainability of the product.

[0058] For the implementation of the combination of potting layer 51 and insulating sleeve 52, firstly, a potting layer 51 is formed on the outside of the temperature acquisition module 4. Specifically, it can be formed by dispensing, impregnation, or molding encapsulation, so that the insulating and thermally conductive adhesive is evenly wrapped around the module body (usually retaining the electrode lead-out area), and cured to form a first layer of firm fixation and insulation. Then, an insulating sleeve 52 is tightly fitted on the outside of the cured potting layer 51. The material and size of the insulating sleeve 52 must match the shape of the potting layer 51 and the size of the internal cavity 11 of the housing 1. Finally, this temperature acquisition module 4 assembly with double protection of potting layer 51 and insulating sleeve 52 is pressed into or assembled into the pre-made independent receiving cavity 11 of the housing 1, and the final fixation is achieved by the interference fit between the outer wall of the insulating sleeve 52 and the inner wall of the receiving cavity 11.

[0059] To ensure optimal temperature sensitivity and response speed while maintaining electrical safety and insulation, the vertical distance between the temperature sensing part of the temperature acquisition module 4 and the lower surface of the overlapping area 3 of the upper wiring part 2 is optimized to be within a relatively close range. After comprehensively considering the dielectric strength of the insulating material, the insulation reliability under long-term operating temperature, and the heat transfer efficiency, this vertical distance is preferably controlled within 0.1-3mm. For example, in an integrated solution, this distance can be stably controlled within approximately 0.5-1.5mm through mold design; in a prefabricated fixing solution, this distance can be controlled within approximately 1.0-2.5mm through precise design of the depth of the accommodating cavity 11. This extremely close distance minimizes the heat conduction path and reduces thermal resistance, enabling the temperature acquisition module 4 to respond extremely sensitively to minute temperature rise changes caused by contact resistance, thereby achieving early alarm.

[0060] Reference Figure 8 In a specific embodiment, to further optimize the mechanical and electrical performance of the terminal block, the terminal block of this application may also adopt a fan-shaped distribution design; that is, there are multiple wiring parts 2, and each wiring part 2 has a fixing hole 31 for fixing the wire connection terminal on the overlapping area 3. The multiple fixing holes 31 are distributed in a fan shape on the housing 1. The multiple wiring parts 2 are arranged in at least one layer (one or more layers) in the direction perpendicular to the mounting surface of the base 1 (i.e., the vertical direction). This embodiment takes the arrangement of multiple wiring parts 2 in one layer as an example, and the multiple wiring parts 2 are located in the same plane.

[0061] For example, in the illustrated 3PIN connector, the three mounting holes 31 are arranged in a fan shape; in this embodiment, to facilitate understanding of the geometric relationship of this fan-shaped distribution, a virtual convergence point C can be defined, and the line connecting the three mounting holes 31 and the virtual convergence point C forms a fan-shaped region ( Figure 1(The dotted area in the image), each fixing hole 31 is distributed along the arc segment of the fan-shaped area; the virtual convergence point C is located at a certain position in front of or inside the housing 1, which is the ideal geometric center for all branch wires to converge and form the main line; in this embodiment, the connection direction between the fixing hole 31 on the overlapping area 3 of each wiring part 2 and the virtual convergence point C is the wiring direction L of the wiring part 2. This stable and orderly connection foundation allows the temperature data monitored by the built-in temperature acquisition module 4 to more accurately reflect the quality status of the electrical connection points themselves, rather than being affected by localized heat accumulation interference caused by messy wiring. This provides more reliable raw data for subsequent intelligent temperature control methods, improving the overall accuracy and reliability of monitoring and judgment.

[0062] Reference Figure 9 In another specific embodiment, for applications requiring higher wiring density, multiple wiring portions 2 are arranged in multiple layers in a direction perpendicular to the mounting surface of the base 1 (i.e., the vertical direction). Each layer includes at least two layers; this embodiment uses an upper and lower layer arrangement as an example. The multiple fixing holes 31 on each layer are distributed in a fan shape (see reference). Figure 8 Furthermore, the mounting planes of the wiring portions 2 on different layers also exhibit a fan-shaped distribution on the projection plane perpendicular to the layer arrangement direction (see reference). Figure 9 This means that when viewed from the front or top of the terminal block, all the upper and lower wiring sections 2 visually converge toward a central area (i.e., the virtual convergence point C). This three-dimensional fan-shaped layout significantly improves space utilization within a limited space and ensures that each layer of cables can obtain optimized path planning in its wiring plane and in the interlayer direction. It effectively reduces cable crossings, interference and stress concentration, and reduces the risk of local overheating caused by messy wiring, so that the temperature acquisition module 4 can more accurately reflect the temperature rise of the connection point itself.

[0063] Reference Figure 10 Based on the above-mentioned structural innovation of the terminal block, this application also discloses a temperature control method for the above-mentioned terminal block, which can be executed by an external control system (such as the main controller of a photovoltaic inverter, a dedicated electrical safety monitoring device, or a programmable logic controller PLC) connected to the signal lead 6 of the terminal block.

[0064] The temperature control method for the terminal block includes: acquiring the temperature value of the overlapping area 3 collected by the temperature acquisition module 4, and executing corresponding protection actions based on the acquired temperature value. This is the basic framework of the entire control method, and all subsequent specific protection logic is developed on this basis.

[0065] Specifically, the protection action based on temperature value includes multiple implementation methods; in one implementation method, if the temperature rise rate collected by any temperature acquisition module 4 is greater than a first threshold within a first preset time period after the terminal block is first powered on, then the protection action of cutting off the current is executed; or, if the temperature value collected by any temperature acquisition module 4 is greater than a second threshold, then the protection action of cutting off the current is executed; this is a rapid response mechanism for instantaneous severe faults.

[0066] In another embodiment, after acquiring the temperature value of the overlapping area 3 collected by the temperature acquisition module 4, the method further includes: acquiring the current value flowing through each wiring part 2 at the current temperature, acquiring the temperature difference between two adjacent overlapping areas 3, and acquiring the temperature rise rate of the temperature values ​​collected by the temperature acquisition module 4 within a second preset time period; and then, based on the temperature values ​​collected by each temperature acquisition module 4, the temperature difference between two adjacent overlapping areas 3, the temperature rise rate of the temperature values ​​collected by the temperature acquisition module 4 within the second preset time period, and the current value flowing through each wiring part 2 at the current temperature, a protection action is performed. This embodiment introduces multi-parameter comprehensive judgment, which can more accurately identify abnormal states.

[0067] Specifically, performing protection actions based on the above parameters includes: if at least two of the following conditions are met simultaneously, a current-cutting protection action is performed; if only one of the following conditions is met, an alarm signal is triggered. The conditions include: The temperature value acquired by any temperature acquisition module 4 is greater than the third threshold and less than the second threshold; The temperature difference between two adjacent overlapping areas 3 is greater than the fourth threshold. The difference between the current value flowing through each wiring section 2 and the preset reference current value corresponding to the current temperature is greater than the fifth threshold. Within the second preset time period, the temperature rise rate of the temperature values ​​collected by the temperature acquisition module 4 is greater than the sixth threshold.

[0068] To ensure the reliability of the protection action, before acquiring the temperature value collected by the temperature acquisition module, a self-test step is also included for each temperature acquisition module 4: temperature acquisition modules 4 that fail the self-test are marked as invalid, and others are marked as valid; this self-test step is automatically triggered when the terminal block is initially powered on or under no-load conditions, and its purpose is to confirm the health status of each temperature acquisition module 4. The acquisition of the temperature value of the overlapping area 3 collected by the temperature acquisition module 4 includes: acquiring the temperature value collected by the temperature acquisition module 4 that is marked as valid.

[0069] The temperature control method of this application will be explained in more detail below with specific examples.

[0070] In one specific embodiment, the temperature control method is executed by the main controller of the photovoltaic inverter connected to the terminal block signal lead 6; the controller has multiple preset temperature thresholds and judgment logic, wherein: The first threshold corresponds to the temperature rise threshold within the first preset time period (first power-on); The second threshold corresponds to the material's tolerance limit threshold; The third threshold corresponds to the temperature alarm threshold (which is lower than the second threshold); The fourth threshold corresponds to the temperature difference threshold between adjacent overlapping areas; The fifth threshold corresponds to the current-temperature correlation deviation threshold; The sixth threshold corresponds to the temperature rise rate threshold within the second preset time period; The first preset time period is a short monitoring window (e.g., 10 minutes) after the first power-on. The second preset time period is a medium- to long-term monitoring window excluding the first hour before the initial power-on (e.g., the following 2, 4, or 8 hours), used to assess the slow temperature rise trend after the system enters steady-state operation.

[0071] First, when the inverter is first installed and powered on, or when the inverter is in standby mode and has no output current in the early morning, the controller automatically triggers the self-test program of the temperature acquisition module 4; the temperature acquisition module 4 that fails the self-test is marked as invalid and an alarm signal is triggered; in subsequent steps, only the temperature values ​​collected by the temperature acquisition module 4 that is marked as valid are used.

[0072] Self-check specifically includes: Determine whether the material constant B value of each temperature acquisition module 4 is within the predetermined normal range.

[0073] The controller performs the following operations sequentially on each temperature acquisition module 4: At an ambient temperature T1 (e.g., 25℃, equivalent to 298.15K Kelvin), the resistance value R1 of the NTC is measured through the ADC circuit; subsequently, by utilizing the slight heating of the inverter's internal auxiliary power supply or waiting for the ambient temperature to change naturally, the ambient temperature of the NTC is raised by about 5-10℃ to T2 (e.g., 30℃, i.e., 303.15K), and after the temperature stabilizes, the corresponding resistance value R2 is measured; the controller calculates the actual B value of the module according to the formula B = (ln(R1 / R2)) / ((1 / T1) - (1 / T2)); if the calculated B value deviates from the nominal B value of the NTC model (e.g., 3950K) by more than ±2% (i.e., outside the range of 3871K-4029K), the inherent thermoelectric characteristics of the module are determined to be abnormal.

[0074] Determine whether the difference between the temperature values ​​output by each temperature acquisition module 4 under the same environmental conditions exceeds the preset allowable deviation threshold.

[0075] Under the above-mentioned steady-state conditions of no load and the temperature of each terminal 2 being fully balanced with the environment, the temperature values ​​reported by all temperature acquisition modules 4 are read synchronously. Assuming that there are four temperature acquisition modules 4 in the three-phase terminal block (one for each of L1 phase line, L2 phase line, L3 phase line, and N phase line), the temperature values ​​read are 24.5℃, 25.0℃, 24.8℃, and 35.2℃, respectively. The difference between the maximum and minimum values ​​is calculated to be 35.2-24.5=10.7℃. If the preset allowable deviation threshold is ±3℃ (i.e., a range exceeding 6℃ is considered abnormal), then this range of 10.7℃ is significantly exceeded, indicating that the output of the fourth module (N phase line) deviates significantly from the group, possibly due to improper installation or its own malfunction leading to poor thermal coupling.

[0076] For temperature acquisition module 4, if the B-value verification is abnormal or the output consistency verification exceeds the limit, the controller marks it as invalid and immediately sends a temperature sensor fault alarm signal to the host computer monitoring platform through the communication interface; in all subsequent temperature rise monitoring and protection steps, the data of the invalid module will be completely excluded.

[0077] After completing the self-test and confirming that at least one effective temperature acquisition module 4 is present, the controller enters the terminal block temperature rise monitoring and protection step. This includes: Obtain the temperature value of the overlapping area 3 collected by the valid temperature acquisition module 4; based on the temperature value, execute the protection action. Specifically: If, within the first preset time period (e.g., 10 minutes) after the terminal block is first powered on, the temperature rise rate measured by any temperature acquisition module 4 exceeds the first threshold, then a current-cutting protection action will be executed. Specifically: For the initial power-on rapid temperature rise judgment, assuming the inverter starts up and begins to output current in the early morning, and the terminal block is powered on; the controller samples the temperature of each effective temperature acquisition module 4 at a frequency of once per second; within the first 10 minutes after startup, the controller calculates the temperature rise rate of each temperature acquisition module 4 (e.g., temperature rise rate per minute); if the temperature rise rate of the temperature acquisition module 4 in the L1 phase line overlap area 3 continues to exceed the preset first threshold (e.g., 6℃ / minute) within 3 minutes after startup, the controller immediately determines that there is a sharp increase in contact resistance in this wiring due to insufficient installation torque; the controller then generates the highest priority interrupt signal, drives the main circuit contactor to cut off the current output, switches the system state to fault protection mode, and records the initial power-on rapid temperature rise of the L1 phase line overlap area 3.

[0078] Alternatively, if the temperature value acquired by any temperature acquisition module 4 exceeds the second threshold, a current-cutting protection action will be executed. Specifically: For determining the material tolerance limit, this criterion remains in effect at any point during system operation. The controller continuously monitors the absolute temperature values ​​of each effective temperature acquisition module 4 and presets two key thresholds: a third threshold (alarm threshold, e.g., 95℃), used to mark the system as entering a critical monitoring state and trigger an early warning; and a second threshold (material tolerance limit threshold, e.g., 115℃), serving as the final safety protection barrier.

[0079] When the temperature value collected by any effective temperature acquisition module 4 exceeds the third threshold (alarm threshold) for the first time, the controller internally marks the module as a high temperature concern state, but at this time the system continues to operate normally and does not output an alarm signal.

[0080] If, despite the temperature being within the range of concern, the temperature value collected by the temperature acquisition module 4 continues to rise and reaches or exceeds the material tolerance limit threshold (second threshold, 115°C) due to failure to address the issue promptly or the fault continuing to worsen, the controller determines that the maximum safe operating temperature of the terminal block material has been exceeded, posing a significant risk of softening, carbonization, or even fire. At this point, the controller will immediately execute a current-cutting protection action, driving the main circuit contactor or circuit breaker to cut off the current output and switching the system status to fault protection mode, while simultaneously recording the material tolerance limit over-temperature fault.

[0081] For example, suppose that during the high-temperature period in summer, the inverter is running at full load and the ambient temperature has reached 40°C; the controller continuously monitors the absolute temperature values ​​of each effective temperature acquisition module 4; if the temperature acquisition module 4 reading of the L2 phase line overlap area 3 continues to rise, first reaching the third threshold (alarm threshold) of 95°C, the controller internally marks this point as a high-temperature concern state; if the fault cannot be controlled and the temperature continues to rise to the material tolerance limit threshold (second threshold) of 115°C, the controller will immediately execute the current cut-off protection action to prevent fire accidents caused by softening or carbonization of the terminal block material.

[0082] This two-tiered threshold design achieves an organic combination of early warning and protection: the third threshold (alarm threshold) is used to identify anomalies in advance and trigger alarms or participate in multi-dimensional judgments, while the second threshold (material tolerance limit threshold) serves as the final safety line, ensuring that the physical limits of the shell material will not be exceeded under any abnormal circumstances. This achieves both early warning and safety under extreme conditions.

[0083] If the system does not trigger the above-mentioned rapid protection, it enters the multi-dimensional combination judgment stage; the controller performs the following analysis once per minute.

[0084] After acquiring the temperature value of the overlapping area 3 collected by the temperature acquisition module 4, the following is also included: The current value flowing through each wiring part 2 at the current temperature is obtained, the temperature difference between two adjacent overlapping areas 3 is obtained, and the temperature rise rate of the temperature value collected by the temperature acquisition module 4 within the second preset time period is obtained. Based on the temperature values ​​collected by each temperature acquisition module 4, the temperature difference between two adjacent overlapping areas 3, the temperature rise rate of the temperature values ​​collected by the temperature acquisition module 4 within the second preset time period, and the current value flowing through each wiring part 2 at the current temperature, a protection action is performed.

[0085] The reference current value can be obtained through self-learning: the temperature values ​​corresponding to each effective temperature acquisition module 4 under different load currents during the historical normal operation of the terminal block are recorded and analyzed, and a correlation model between the current and the expected temperature value is established. This model reflects the normal thermal behavior characteristics of the terminal block under healthy conditions. When the real-time monitored temperature value deviates significantly from the expected temperature of the model under the current current, it indicates that there may be abnormalities such as increased contact resistance. It should be noted that the temperature control method of this application uses the current as a reference for self-learning and establishes a correlation model of "expected current value at the current temperature" or "expected temperature value at the current current", thereby realizing bidirectional verification of temperature and current.

[0086] In a specific application, assuming the inverter output current is 30A, the real-time readings from each effective temperature acquisition module 4 are: 98℃ for the L1 phase line overlap area 3, 85℃ for the L2 phase line overlap area 3, 87℃ for the L3 phase line overlap area 3, and 86℃ for the N phase line overlap area 3. The controller performs judgments across four dimensions: a. Temperature monitoring: Set the third threshold (alarm threshold) to 95℃; if the temperature of the L1 phase line overlap area 3 is 98℃, which exceeds this threshold (and is less than the second threshold of 115℃), condition a is satisfied.

[0087] b. Adjacent temperature difference: Calculate the temperature difference between two adjacent overlapping regions 3; for example, the difference between L1 and L2 is 98-85=13℃, the difference between L2 and L3 is 87-85=2℃, and the difference between L3 and N is 87-86=1℃; if the preset fourth threshold (adjacent temperature difference threshold) is 10℃, then the 13℃ between L1 and L2 has exceeded the fourth threshold, and condition b is satisfied.

[0088] c. Temperature and current correlation deviation: For L1 phase line overlap area 3, the controller queries its historical self-learned current-temperature correlation model; the model shows that at the current temperature of 98℃, the expected current value under healthy conditions should be 25A; while the actual current flowing through the L1 connection is 30A, the difference between the actual current value and the expected current value is 5A; if the preset fifth threshold (current and temperature correlation deviation threshold) is 4A, then the deviation of 5A has exceeded the fifth threshold, and condition c is satisfied.

[0089] d. Temperature rise rate: Calculate the temperature rise rate of the temperature values ​​collected by the temperature acquisition module 4 within the second preset time period; the second preset time period is defined as excluding the medium-to-long-term monitoring window excluding the first hour before the first power-on, such as selecting the time period of the most recent 2 hours, 4 hours or 8 hours; the purpose of this design is to filter out the unstable thermal transients in the initial startup phase of the system and focus on capturing the gradual temperature rise trend caused by the slow increase in contact resistance. Specifically, the controller records the temperature data of each effective temperature acquisition module 4 in the last 4 hours, and obtains the temperature rise rate of the module in the second preset time period by linear fitting or calculating the average temperature rise rate; if the temperature rise rate of the L1 phase line overlap area 3 in the last 4 hours is 0.8℃ / hour, and the preset sixth threshold (temperature rise rate threshold) is 1.5℃ / hour, then 0.8℃ / hour does not exceed the sixth threshold, and condition d is not satisfied.

[0090] At this time, if conditions a, b, and c are met simultaneously (at least two conditions are met), the controller determines that there is a high-confidence risk of degradation, and then performs a current-cutting protection action and records the fault as "L1 phase line overlap area 3 multi-dimensional anomaly".

[0091] In another specific application, assume the phase temperature readings are as follows: 88℃ for phase 1 (overlapping region 3), 89℃ for phase 2 (overlapping region 3), 87℃ for phase 3 (overlapping region 3), and 88℃ for phase N (overlapping region 3). The analysis results across the four dimensions are: a. Temperature monitoring: All temperatures did not exceed the third threshold of 95℃, so condition a is not met.

[0092] b. Adjacent temperature differences: The difference between L1 and L2 is 1℃, the difference between L2 and L3 is 2℃, and the difference between L3 and N is 1℃. None of these exceed the fourth threshold of 10℃, so condition b is not met.

[0093] c. Temperature and current correlation deviation: The deviation between the actual current value of each phase and its expected current value at the current temperature is within ±2A, which does not exceed the fifth threshold of 4A. Therefore, condition c is not met.

[0094] d. Temperature rise rate: The temperature rise rate of each phase is within 0.3℃ / min, which does not exceed the sixth threshold of 1.5℃ / min, so condition d is not met.

[0095] At this point, none of the conditions are met, and the system is determined to be in normal operating condition.

[0096] In another specific application, suppose that only the temperature reading of the L1 phase line overlap area 3 is 97℃ (exceeding the third threshold but less than the second threshold), but the adjacent temperature difference analysis shows that the difference between L1 and L2 is 5℃ (not exceeding the fourth threshold), the current and temperature correlation analysis shows that the deviation is 3A (not exceeding the fifth threshold), and the temperature rise rate is 0.9℃ / minute (not exceeding the sixth threshold); at this time, only condition a is met, the controller determines it as a low-level anomaly, immediately triggers an alarm signal (such as sending a "L1 phase line overlap area 3 temperature too high warning" message to the host computer), but maintains the normal operation of the system, thereby realizing predictive maintenance and avoiding sudden shutdown without alarm.

[0097] Through the detailed control logic described above, the temperature control method of this application makes full use of the accurate, in-situ temperature data provided by the innovative terminal block structure, ensures the reliability of the data source through self-testing, responds to instantaneous severe faults through rapid protection, and accurately identifies long-term slow degradation risks through multi-dimensional combination judgment, thus realizing an intelligent upgrade from passive monitoring to active protection.

[0098] This application constructs a complete safety protection system from hazard perception and judgment to proactive intervention through the integration of physical structure and the synergistic innovation of intelligent control logic. In terms of core structure, the temperature acquisition module 4 is creatively built into the junction box housing and positioned directly below the overlapping area 3 of the wiring part 2, realizing the shortest distance thermal coupling between the sensor and the heat source, thereby obtaining the ability to monitor temperature in situ quickly and accurately. In particular, the fixing holes 31 introduced into the overlapping area 3 of the wiring part 2 are designed in a fan shape (including multi-layer projection fan shape), which not only optimizes the cable routing and reduces installation stress and loosening risk, but also creates a stable and orderly electrical connection environment from the source. This allows the data collected by the built-in temperature acquisition module 4 to more realistically reflect the electrical state of the connection point itself, rather than being interfered with by messy wiring, providing a high-fidelity and high-reliability data foundation for subsequent intelligent monitoring from a physical level.

[0099] Based on the aforementioned reliable sensing foundation, this application further achieves accurate assessment and layered response to safety risks through a hierarchical intelligent control method. This method first verifies the temperature acquisition module 4 through a self-test step to ensure data reliability. Then, it implements three levels of monitoring through a terminal block temperature rise monitoring and protection step: for risks of rapid temperature rise upon initial power-on and reaching material limit temperatures, it performs rapid power-off protection; for hidden risks such as slow increases in contact resistance during long-term operation, it intelligently assesses the combined relationships of temperature value, adjacent temperature difference, temperature rise rate, and dynamic deviation between temperature and current, triggering protection only when multiple conditions are simultaneously met, and issuing only a warning for a single abnormality, thereby achieving early warning while minimizing the false alarm rate. Finally, this solution upgrades the traditional terminal block from a passively connected component to an intelligent safety node with real-time sensing, intelligent diagnosis, and active protection capabilities.

[0100] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A terminal, characterized by: The device includes a housing and at least one wiring portion disposed within the housing. The wiring portion has an overlap area for connecting external wires. A temperature acquisition module is disposed within the housing, corresponding to the overlap area and located below the overlap area.

2. The terminal block of claim 1, wherein: The temperature acquisition module is integrated with the housing.

3. The terminal block according to claim 1, characterized in that: The temperature acquisition module is covered with an insulating structure and is fixed inside the housing by the insulating structure.

4. The terminal block according to claim 1, characterized in that: The wiring section is provided in multiple parts, including one or more of the phase wire wiring section, neutral wire wiring section, and ground wire wiring section; At least below the overlapping areas of the phase wire connection section and the neutral wire connection section, the temperature acquisition module is respectively provided.

5. The terminal block according to claim 1, characterized in that: The temperature acquisition module is connected to a signal lead, which extends outside the housing for connection to an external control system.

6. The terminal block according to claim 1, characterized in that: The wiring section is provided in multiple parts, and each of the multiple overlapping areas is provided with a fixing hole. The fixing hole is used to fix the connection terminal of the wire. The multiple fixing holes are distributed in a fan shape on the housing.

7. The terminal block according to claim 1, characterized in that: The plurality of the wiring portions are arranged in at least one layer on the housing, and the plurality of the fixing holes on each layer are distributed in a fan shape; Furthermore, the mounting planes of the wiring portions on different layers also exhibit a fan-shaped distribution when projected onto a projection plane perpendicular to the layer arrangement direction.

8. A temperature control method for a terminal block as described in any one of claims 1-7, characterized in that: include: Obtain the temperature value of the overlapping area collected by the temperature acquisition module; Based on the temperature value, a protective action is performed.

9. The temperature control method according to claim 8, characterized in that: Based on the temperature value, perform protective actions, including: If, within the first preset time period after the terminal block is first powered on, the temperature rise rate of any of the temperature acquisition modules exceeds the first threshold, then a current-cutting protection action is executed. Alternatively, if the temperature value acquired by any of the temperature acquisition modules is greater than the second threshold, a current-cutting protection action is performed.

10. The temperature control method according to claim 8, characterized in that: After obtaining the temperature value of the overlapping area collected by the temperature acquisition module, the method further includes: The system acquires the current value flowing through each of the wiring terminals at the current temperature, the temperature difference between two adjacent overlapping areas, and the temperature rise rate of the temperature values ​​acquired by the temperature acquisition module within a second preset time period. Based on the temperature values ​​collected by each of the temperature acquisition modules, the temperature difference between two adjacent overlapping areas, the temperature rise rate of the temperature values ​​collected by the temperature acquisition modules within a second preset time period, and the current value flowing through each of the wiring terminals at the current temperature, a protection action is performed.

11. The temperature control method according to claim 10, characterized in that: Based on the temperature values ​​collected by each of the temperature acquisition modules, the temperature difference between two adjacent overlapping areas, the temperature rise rate of the temperature values ​​collected by the temperature acquisition modules within a second preset time period, and the current value flowing through each of the wiring terminals at the current temperature, a protection action is executed, including: The current-cutting protection action is performed if at least two of the following conditions are met simultaneously; if only one of the following conditions is met, an alarm signal is triggered. The conditions include: The temperature value acquired by any of the temperature acquisition modules is greater than the third threshold and less than the second threshold; The temperature difference between two adjacent overlapping areas is greater than the fourth threshold. The difference between the current value flowing through each of the aforementioned terminals and the preset reference current value corresponding to the current temperature is greater than the fifth threshold. Within the second preset time period, the rate of temperature rise of the temperature values ​​collected by the temperature acquisition module is greater than the sixth threshold.

12. The temperature control method according to any one of claims 8-11, characterized in that: Before acquiring the temperature value of the overlapping area collected by the temperature acquisition module, the method further includes: Perform a self-test on each of the temperature acquisition modules, mark the temperature acquisition modules that fail the self-test as invalid, and mark the others as valid; Obtaining the temperature value of the overlapping area collected by the temperature acquisition module includes: obtaining the temperature value of the overlapping area collected by the temperature acquisition module that is marked as valid.

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