Photovoltaic junction box with temperature monitoring structure

Abstract

The application discloses a photovoltaic junction box with a temperature monitoring structure and relates to the technical field of photovoltaic junction boxes. The photovoltaic junction box comprises a shell, the shell is detachably connected with a gland, the gland is provided with a temperature sensing module for monitoring temperature changes in the shell, the shell is slidably connected with symmetrically distributed first moving blocks and symmetrically distributed second moving blocks, the first moving blocks are provided with first conductive sheets, the second moving blocks are provided with second conductive sheets, the shell is rotatably connected with a driving rod, the driving rod is provided with external threads, and the shell is provided with connecting wires. The photovoltaic junction box is fixed to adjacent electrode sheets on a photovoltaic panel through clamping, so that the installation and dismounting process is faster, additional operations are no longer needed, and the electrode sheets on the photovoltaic panel no longer need to be repeatedly bent during the installation and dismounting process, thereby reducing the probability of breakage of the electrode sheets on the photovoltaic panel.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic junction box technology, and more particularly to a photovoltaic junction box with a temperature monitoring structure. Background Technology

[0002] As a critical electrical connection component in photovoltaic module systems, the reliability of photovoltaic junction boxes directly impacts the operational efficiency and safety of photovoltaic power plants. Traditionally, photovoltaic junction boxes are installed by welding the metal electrode plates on the photovoltaic panel to the electrode plates inside the junction box. When maintenance or replacement is needed, the solder at the weld points must be melted with a soldering iron, and the bent electrode plates must be manually straightened to separate them. This process has the following significant drawbacks:

[0003] 1. Complexity and low efficiency of operation: Disassembly and installation both rely on manual operation with a soldering iron, which requires high skills from the operators. In addition, improper temperature control during the soldering process can easily lead to oxidation of the electrode or thermal damage to adjacent components, affecting the stability of the electrical connection.

[0004] 2. Potential mechanical fatigue of electrode sheets: The electrode sheets need to be bent repeatedly (straightened during disassembly and bent again during installation). The metal material is prone to micro-cracks due to the accumulation of plastic deformation, which may lead to breakage after long-term use. Summary of the Invention

[0005] In order to overcome the shortcomings of existing photovoltaic junction boxes during use, the present invention provides a photovoltaic junction box with a temperature monitoring structure.

[0006] The technical solution is as follows: A photovoltaic junction box with a temperature monitoring structure includes a housing, a cover detachably connected to the housing, a temperature sensing module for monitoring temperature changes inside the housing, a first movable block and a second movable block slidably connected inside the housing, a first conductive sheet on the first movable block and a second conductive sheet on the second movable block, the first conductive sheet and the adjacent second conductive sheet for clamping and fixing electrode plates, a drive rod rotatably connected inside the housing, the drive rod having an external thread, the drive rod being threadedly connected to both the first movable block and the second movable block through its external thread, the drive rod being used to drive the first movable block and the adjacent second movable block to move relative to each other, and a connecting wire provided in the housing, the connecting wire being electrically connected to both of the first conductive sheets.

[0007] Furthermore, both the first conductive sheet and the second conductive sheet are provided with arc-shaped surfaces, with the arc-shaped surface of the first conductive sheet being concave and the arc-shaped surface of the second conductive sheet being convex.

[0008] Furthermore, the external thread on the drive rod consists of four parts. The four external thread parts on the drive rod are, in order, a first threaded part, a second threaded part, a third threaded part, and a fourth threaded part, from the end of the drive rod away from the connecting line to the end closer to the connecting line. The first threaded part and the fourth threaded part are symmetrically distributed, the second threaded part and the third threaded part are symmetrically distributed, and the pitch of the second threaded part is greater than the pitch of the first threaded part.

[0009] Furthermore, the distance between the first moving block and the electrode plate is equal to the length of the first threaded portion.

[0010] Furthermore, a first limiting block is fixed to the side of the pressure cover near the photovoltaic panel, and the first limiting block is used to limit the drive rod.

[0011] Furthermore, it also includes a mounting base, which is detachably connected to the outer shell. The outer shell is provided with a plurality of circumferentially distributed grooves. A second limiting block is fixedly connected in the grooves of the outer shell. The mounting base is used to limit the second limiting block. The mounting base is slidably connected to a symmetrically distributed third moving block. A first elastic element is provided between the third moving block and the mounting base. The third moving block is in contact with the adjacent second limiting block.

[0012] Furthermore, a wire shell is detachably connected to one side of the outer shell, the connecting wire is located inside the wire shell, a movable shell is slidably connected to the wire shell, a second elastic element is provided between the wire shell and the movable shell, an external thread is provided on the side of the movable shell away from the outer shell, a rotating shell is threaded to the movable shell through its external thread, a pressing shell is rotatably connected to the rotating shell, and a plurality of circumferentially evenly distributed pressing blocks are fixed to the side of the movable shell near its external thread, the pressing shell is used to press the pressing blocks.

[0013] Furthermore, the several extrusion blocks that are evenly distributed circumferentially are all in an inclined state.

[0014] Furthermore, several fastening shells are fixedly connected inside the conductor shell, the connecting wire passes through the fastening shells, and the fastening shells are in contact with the connecting wire.

[0015] Furthermore, the fastening shell is made of an elastic deformable material, and the fastening shell is frustum-shaped, with the diameter of the fastening shell on the side closer to the outer shell being smaller than the diameter on the side farther from the outer shell.

[0016] Compared with the prior art, the present invention has at least the following advantages: The present invention fixes the adjacent electrode sheets on the photovoltaic panel by clamping, making the installation and disassembly process faster and eliminating the need for additional operations. At the same time, the electrode sheets on the photovoltaic panel no longer need to be repeatedly bent during installation and disassembly, reducing the probability of electrode sheet breakage on the photovoltaic panel. By observing the color change of the temperature sensing module on the pressure cover, the working status of the components inside the casing can be directly determined, making the overall process faster.

[0017] By adopting a plug-in design for the outer casing and mounting base, disassembly of the casing is made more convenient. When the casing needs to be replaced, there is no need to clean residual adhesive on the photovoltaic panel, reducing the probability of damage to the photovoltaic panel. As the connecting line moves under the influence of wind, the connecting line drives the moving shell to move, stretching the second elastic element between the moving shell and the conductor shell. This increases the resistance of the connecting line during the pulling process, buffers the tension on the connecting line, and increases the stability of the connection between the connecting line and the first moving block. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the first and second moving blocks of the present invention;

[0020] Figure 3 This is a three-dimensional structural cross-sectional view of the outer casing of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the first and second conductive sheets of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the outer shell and the wire shell of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the first moving block, the second moving block, and the driving rod of the present invention;

[0024] Figure 7 This is a three-dimensional structural cross-sectional view of the mounting base of the present invention;

[0025] Figure 8 This is an exploded three-dimensional view of the second limiting block and the third moving block of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the mounting base and the second limiting block of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the mounting base of the present invention;

[0028] Figure 11This is a three-dimensional structural diagram of the movable shell and the rotating shell of the present invention;

[0029] Figure 12 This is a three-dimensional structural cross-sectional view of the movable shell and the rotating shell of the present invention.

[0030] The diagram is labeled as follows: 1-Photovoltaic panel, 2-Shell, 3-Cover, 4-First moving block, 5-Second moving block, 41-First conductive sheet, 51-Second conductive sheet, 7-Drive rod, 71-Connecting wire, 8-First limiting block, 9-Mounting base, 10-Second limiting block, 11-Third moving block, 12-Wire housing, 13-Moving housing, 14-Rotating housing, 15-Extrusion housing, 16-Extrusion block, 17-Fastening housing. Detailed Implementation

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] Example 1

[0033] This embodiment discloses a photovoltaic junction box with a temperature monitoring structure.

[0034] like Figures 1-5As shown, the photovoltaic junction box with a temperature monitoring structure includes a housing 2, which is mounted on a photovoltaic panel 1. Several housings 2 can be mounted on the same photovoltaic panel 1. Symmetrically distributed electrode plates are mounted on the photovoltaic panel 1. In this embodiment, the housing 2 is fixed to the photovoltaic panel 1 with adhesive. The figure shows the photovoltaic panel 1 located on the lower side of the housing 2 as an example. In actual use, the photovoltaic panel 1 should be located on the upper side of the housing 2. All directional descriptions in this document are based on the figure. A pressure cover 3 is detachably connected to the upper side of the housing 2. The pressure cover 3 is equipped with a temperature sensing module for monitoring temperature changes inside the housing 2. The temperature sensing module on the pressure cover 3 is an existing device made of temperature-sensitive material, which changes color with temperature increases or decreases. A sealing ring is provided on the outer side of the pressure cover 3 to increase the seal between the pressure cover 3 and the housing 2. Left and right sliding connections are provided inside the housing 2. Two first moving blocks 4 and two second moving blocks 5 symmetrically distributed on the left and right sides are provided. The two second moving blocks 5 are located between the two first moving blocks 4. A first conductive plate 41 is provided on the facing side of the two first moving blocks 4, and a second conductive plate 51 is provided on the opposite side of the two second moving blocks 5. The first conductive plate 41 and the adjacent second conductive plate 51 together clamp and fix the adjacent electrode plates. A drive rod 7 is rotatably connected inside the outer shell 2. The drive rod 7 is provided with external threads. The drive rod 7 is threaded to both the first moving blocks 4 and the second moving blocks 5 through its external threads. The rotation of the drive rod 7 can realize the movement of the first moving blocks 4 and the adjacent second moving blocks 5 towards or away from each other. The outer shell 2 is provided with a connecting line 71. In this embodiment, the connecting line 71 passes through the outer shell 2 and is electrically connected to both first conductive plates 41 for transmitting power.

[0035] like Figure 4 and Figure 5 As shown, both the first conductive sheet 41 and the second conductive sheet 51 are provided with arc-shaped surfaces. The arc-shaped surface of the first conductive sheet 41 is concave, and the arc-shaped surface of the second conductive sheet 51 is convex. When the electrode sheet is clamped and fixed by the adjacent first conductive sheet 41 and the adjacent second conductive sheet 51, the electrode sheet is subjected to the squeezing force of the two and forms an arc shape, which improves the stability of the connection between the two and the electrode sheet.

[0036] like Figures 4-6 As shown, the external thread on the drive rod 7 consists of four parts. The four external thread parts on the drive rod 7 are, in order, a first threaded part, a second threaded part, a third threaded part, and a fourth threaded part, from the end of the drive rod 7 away from the connecting line 71 to the end closer to the connecting line 71. The first threaded part and the fourth threaded part are symmetrically distributed, as are the second threaded part and the third threaded part. The pitch of the second threaded part is greater than the pitch of the first threaded part, so that during the rotation of the drive rod 7, the distance that the first moving block 4 moves per unit time is less than the distance that the second conductive sheet 51 moves per unit time.

[0037] like Figure 6 As shown, the distance between the first moving block 4 and the electrode sheet is equal to the length of the first threaded portion. After the electrode sheet comes into contact with the first conductive sheet 41, it begins to deform at the point of contact between the two, thereby ensuring the stability of the connection between the electrode sheet and the photovoltaic panel 1.

[0038] The specific workflow of the above scheme is as follows:

[0039] Installation instructions:

[0040] Workers apply glue to the underside of the outer casing 2. After application, the position of the outer casing 2 is adjusted so that the two electrode plates on the photovoltaic panel 1 are positioned between the adjacent first moving block 4 and the adjacent second moving block 5, respectively. Then, the workers fix the outer casing 2 to the photovoltaic panel 1. After fixing, the workers rotate the drive rod 7. During the rotation, the drive rod 7 drives the two first moving blocks 4 and the two second moving blocks 5 to move through its external threads (the two first moving blocks 4 move closer to each other, and the two second moving blocks 5 move further away from each other, that is, the distance between the first moving block 4 and the adjacent second moving block 5 continuously decreases). The first moving block 4 drives the adjacent first conductive sheet 41 to move, and the second moving block 5 drives the adjacent second conductive sheet 51 to move. During the movement, the first conductive sheet 41 and the adjacent second conductive sheet 51 jointly squeeze the adjacent electrode plates, causing the adjacent electrode plates to deform under the pressure.

[0041] After both first moving blocks 4 and two second moving blocks 5 have moved to their limit positions, the operator stops rotating the drive rod 7. At this time, the two electrode plates on the photovoltaic panel 1 are squeezed by the adjacent first conductive plate 41 and the adjacent second conductive plate 51 respectively, and form an arc shape. This improves the stability of the connection between the first conductive plate 41 and the adjacent second conductive plate 51 and the adjacent electrode plate, and ensures the stability of the electrical transmission between the electrode plate and the adjacent first conductive plate 41 and the adjacent second conductive plate 51. After stopping the rotation of the drive rod 7, the operator puts the pressure cap 3 on the outer shell 2, which completes the installation of the device.

[0042] After installation, photovoltaic panel 1 can be put into use. During normal use of photovoltaic panel 1, when the intensity of sunlight in the external environment changes, the power generation rate of photovoltaic panel will also change, which will cause the temperature inside the outer casing 2 to change. However, the temperature difference is within the allowable range in this case (the temperature of the junction box will exceed the external environment by 20-30℃ under normal operation). When the components inside the outer casing 2 have a connection failure, it will cause the contact resistance between the first conductive sheet 41 and the adjacent second conductive sheet 51 and the adjacent electrode sheet to increase, causing the temperature change inside the outer casing 2 to exceed the threshold, resulting in the outer casing 2 being deformed by heat and affecting the overall sealing performance. Therefore, the staff can judge the change of heat inside the outer casing 2 by observing the color change of the temperature sensing module on the pressure cover 3, thereby judging whether the components inside the outer casing 2 are in a normal working state, eliminating the need for an infrared detector and making the whole process faster.

[0043] Replacement operation:

[0044] When the outer casing 2 is damaged by external impact or deformed due to heat generated by internal components, the operator needs to replace the outer casing 2. The replacement process is as follows:

[0045] After opening the pressure cap 3, rotating the drive rod 7 in the opposite direction will separate the first conductive sheet 41 and the adjacent second conductive sheet 51 from the adjacent electrode sheet. Then, the staff will separate the outer shell 2 from the photovoltaic panel 1, completing the disassembly of the outer shell 2. The overall process is faster than the welding method. After the outer shell 2 is disassembled (at this time, the two electrode sheets on the photovoltaic panel 1 are still in the deformed state), the staff can install the replacement outer shell 2 on the photovoltaic panel 1 according to the above operation. During the installation of the new outer shell 2, the electrode sheets on the photovoltaic panel 1 can still fit the shape of the adjacent first conductive sheet 41 and the adjacent second conductive sheet 51 in the new outer shell 2 after deformation, without the need for secondary deformation, thereby reducing the probability of the electrode sheets on the photovoltaic panel 1 breaking.

[0046] Example 2

[0047] like Figure 7 As shown, a first limiting block 8 is fixed to the lower side of the pressure cap 3, and a knob is provided in the middle of the drive rod 7. The knob on the drive rod 7 is provided with a groove. When the first limiting block 8 contacts the knob on the drive rod 7, it limits the drive rod 7 and reduces the movement amplitude of the drive rod 7 when subjected to vibration.

[0048] The specific workflow of the above scheme is as follows:

[0049] After the pressure cap 3 is installed on the outer casing 2, the first limiting block 8 contacts the drive rod 7 and limits the knob on the drive rod 7, preventing the drive rod 7 from rotating. This reduces the probability that the drive rod 7 will rotate due to the shaking of the photovoltaic panel after the outer casing 2 is installed on the photovoltaic panel 1, and further increases the stability of the connection between the first conductive sheet 41 and the adjacent second conductive sheet 51 and the adjacent electrode sheet.

[0050] Example 3

[0051] like Figure 1 , Figure 2 and Figures 7-10 As shown, it also includes a mounting base 9, which is detachably connected to the outer casing 2. A rubber pad is provided on the lower side of the outer casing 2 to increase the sealing between the outer casing 2 and the mounting base 9. In this embodiment, the mounting base 9 is fixed to the photovoltaic panel 1 with glue, and the outer casing 2 is not directly connected to the photovoltaic panel 1. The upper side of the mounting base 9 is provided with symmetrically distributed limiting parts. The outer casing 2 is provided with several circumferentially distributed grooves. The specific number of grooves is selected by the operator. In the figure and text, four are used as an example. A second limiting block 10 is fixed in the groove of the outer casing 2. The second limiting block 10 is made of an elastic deformable material. The second limiting block 10 is provided with an inclined surface. The limiting part on the mounting base 9 is used to squeeze the adjacent second limiting block 10, causing the second limiting block 10 to deform. The mounting base 9 is used to limit the second limiting block 10. The mounting base 9 is slidably connected to two third moving blocks 11 symmetrically distributed front and rear. A first elastic element is provided between the third moving block 11 and the mounting base 9. The first elastic element is a spring, which is used to drive the third moving block 11 to reset after movement. The third moving block 11 fits with the adjacent second limiting block 10, and the third moving block 11 squeezes the two adjacent second limiting blocks 10 during the movement.

[0052] The specific workflow of the above scheme is as follows:

[0053] Before installing the outer casing 2, apply adhesive to the lower side of the mounting base 9, and then install the mounting base 9 in the appropriate position of the photovoltaic panel 1 (so that the two electrode plates on the photovoltaic panel 1 are located in the middle of the mounting base 9). Then, the worker aligns the outer casing 2 with the limiting part of the mounting base 9 and presses the outer casing 2 down, so that the outer casing 2 drives the four second limiting blocks 10 to move down synchronously. During the movement, the limiting part of the mounting base 9 presses the inclined surface of the four second limiting blocks 10, so that the four second limiting blocks 10 bend and deform under the pressure (the lower side of the four second limiting blocks 10 moves towards the direction of adhering to the outer casing 2). Until the lower side of the outer casing 2 moves down to adhere to the mounting base 9, the four second limiting blocks 10 are no longer pressed by the limiting part of the mounting base 9, so that the four second limiting blocks 10 return to their original position relative to the outer casing 2 under the action of their own elasticity. The second limiting blocks 10 return to their original position through their own elasticity and are locked and fixed with the limiting part of the mounting base 9, thus fixing the outer casing 2 to the mounting base 9.

[0054] When the outer casing 2 needs to be replaced, the operator first separates the two first conductive plates 41 and the two second conductive plates 51 from the adjacent electrode plates as described above. Then, the operator presses the two third moving blocks 11, bringing them closer together (and compressing and storing force on the adjacent first elastic elements). At the same time, the third moving blocks 11 press against the two adjacent second limiting blocks 10, bringing the corresponding second limiting blocks 10 closer together, thereby causing the second limiting blocks 10 to lose contact with the mounting base 9. When both third moving blocks 11 have moved to their limit positions, the four second limiting blocks 10 no longer contact the mounting base 9. At this point, the staff can directly move the outer casing 2 upwards and pull it out of the mounting base 9, completing the disassembly of the outer casing 2. There is no need to clean the cured adhesive between the photovoltaic panel 1 and the mounting base 9, making the entire disassembly process faster and more convenient, while reducing the probability of damage to the photovoltaic panel 1 (when cleaning the residual adhesive, the photovoltaic panel 1 may be scratched or otherwise damaged due to the staff's operation error, which will affect the normal use of the photovoltaic panel 1). After disassembly, the two third moving blocks 11 are released, and the two third moving blocks 11 can be reset to their initial positions relative to the mounting base 9 under the action of the adjacent first elastic element.

[0055] After disassembly, the staff installed the new outer casing 2 on the mounting base 9 according to the above operation to continue to transmit the current generated by the photovoltaic panel 1.

[0056] Example 4

[0057] like Figure 2 , Figure 11 and Figure 12As shown, a wire housing 12 is detachably connected to the right side of the outer casing 2. A connecting wire 71 is located inside the wire housing 12, and the portion of the connecting wire 71 inside the wire housing 12 is curved. A movable housing 13 is slidably connected to the outside of the wire housing 12. A second elastic element, which is a tension spring, is provided between the wire housing 12 and the movable housing 13. An external thread is provided on the right side of the movable housing 13, and a rotating housing 14 is threadedly connected to the movable housing 13 through the external thread. A pressing housing 15 is rotatably connected to the rotating housing 14. Several pressing blocks 16 are circumferentially evenly distributed and fixed to the right side of the movable housing 13. The specific number of pressing blocks 16 can be selected by the operator during actual use. The figure shows four circumferentially evenly distributed as an example. The pressing blocks 16 are made of elastic deformable material. Initially, the four pressing blocks 16 are all in an inclined state. During the rotation of the rotating housing 14, the pressing housing 15 moves. During the movement of the pressing housing 15, the pressing housing 15 presses the four pressing blocks 16, causing the right sides of the pressing blocks 16 to move closer to each other.

[0058] like Figure 11 and Figure 12 As shown, several fastening shells 17 are fixed inside the conductor shell 12. The connecting wire 71 passes through the fastening shell 17. The fastening shell 17 is made of rubber and is frustoconical. The diameter of the fastening shell 17 on the side closer to the outer shell 2 is smaller than the diameter on the side farther away from the outer shell 2, which is used to increase the resistance encountered by the connecting wire 71 during movement.

[0059] The specific workflow of the above scheme is as follows:

[0060] After the outer shell 2 is installed, the operator rotates the rotating shell 14, causing the rotating shell 14 to drive the extrusion shell 15 to move to the left along the moving shell 13. During the movement, the extrusion shell 15 extrudes all the extrusion blocks 16, causing the right side of the extrusion blocks 16 to be subjected to radial extrusion force and converge towards the center. Thus, the right sides of all the extrusion blocks 16 together clamp and fix the connecting line 71. After the rotating shell 14 can no longer move to the left, the operator stops rotating the rotating shell 14. At this time, the four extrusion blocks 16 have completed the fixation of the connecting line 71.

[0061] During the use of photovoltaic panel 1, when photovoltaic panel 1 sways due to wind, outer shell 2 sways synchronously with photovoltaic panel 1. During this process, connecting wire 71 also sways due to wind, causing relative movement between outer shell 2 and connecting wire 71. During the movement of connecting wire 71, four pressing blocks 16 drive moving shell 13 to move synchronously, and stretch and store force between moving shell 13 and wire shell 12. At the same time, straighten the curved connecting wire 71 located in wire shell 12. This part of connecting wire 71 buffers the tension on connecting wire 71, thereby reducing the stress on the connection between connecting wire 71 and first conductive sheet 41, improving the stability of the connection between first conductive sheet 41 and connecting wire 71, and ensuring that photovoltaic panel 1 can still transmit power normally in windy weather.

[0062] During the process of straightening the bent connecting line 71, the connecting line 71 drives the left sides of the two fastening shells 17 to move synchronously, causing the left sides of the fastening shells 17 to pile up to the right (the left side moves to the right while the position of the right side does not change), and at the same time, the fastening shells 17 contract towards the center, thereby increasing the contact pressure between the fastening shells 17 and the connecting line 71 to enhance the friction between them, thereby increasing the resistance of the connecting line 71 during the straightening process, buffering the tension on the connecting line 71, and further increasing the stability of the connection between the connecting line 71 and the first conductive sheet 41.

[0063] After the wind force in the external environment decreases, the second elastic element between the conductor shell 12 and the movable shell 13 drives the movable shell 13 to return to its original position to the left. At the same time, all the pressing blocks 16 drive the connecting wire 71 to move synchronously, causing the connecting wire 71 located inside the outer shell 2 to return to its bent state. During the movement of the connecting wire 71, the fastening shell 17 gradually returns to its initial state under the action of its own elasticity and the frictional force between it and the connecting wire 71. The above is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A photovoltaic junction box with a temperature monitoring structure, characterized in that, The device includes an outer shell (2), which is detachably connected to a pressure cap (3). The pressure cap (3) is equipped with a temperature sensing module for monitoring temperature changes inside the outer shell (2). A first moving block (4) and a second moving block (5) are slidably connected inside the outer shell (2). A first conductive sheet (41) is provided on the first moving block (4), and a second conductive sheet (51) is provided on the second moving block (5). The first conductive sheet (41) and the adjacent second conductive sheet (51) are used to clamp and fix the electrode sheet. A drive rod (7) is rotatably connected inside the outer shell (2). The drive rod (7) is provided with an external thread. The drive rod (7) is threaded to both the first moving block (4) and the second moving block (5) through its external thread. The drive rod (7) is used to drive the first moving block (4) and the adjacent second moving block (5) to move relative to each other. A connecting line (71) is provided in the outer shell (2). The connecting line (71) is electrically connected to both of the first conductive sheets (41). The external thread on the drive rod (7) consists of four parts. The four external threads on the drive rod (7) are, in order, a first thread, a second thread, a third thread, and a fourth thread, from the end of the drive rod (7) away from the connecting line (71) to the end near the connecting line (71). The first thread and the fourth thread are symmetrically distributed, the second thread and the third thread are symmetrically distributed, and the pitch of the second thread is greater than the pitch of the first thread. The pressure cap (3) is fixedly connected to a first limiting block (8), which is used to limit the drive rod (7); It also includes a mounting base (9), which is detachably connected to the outer shell (2). The outer shell (2) is provided with a plurality of grooves distributed circumferentially. A second limiting block (10) is fixedly connected in the groove of the outer shell (2). The mounting base (9) is used to limit the second limiting block (10). The mounting base (9) is slidably connected to a symmetrically distributed third moving block (11). A first elastic element is provided between the third moving block (11) and the mounting base (9). The third moving block (11) fits against the adjacent second limiting block (10).

2. A photovoltaic junction box with a temperature monitoring structure according to claim 1, characterized in that, Both the first conductive sheet (41) and the second conductive sheet (51) are provided with arc-shaped surfaces, and the arc-shaped surface of the first conductive sheet (41) is concave, while the arc-shaped surface of the second conductive sheet (51) is convex.

3. A photovoltaic junction box with a temperature monitoring structure according to claim 2, characterized in that, The distance between the first moving block (4) and the electrode plate is equal to the length of the first threaded portion.

4. A photovoltaic junction box with a temperature monitoring structure according to claim 3, characterized in that, A wire shell (12) is detachably connected to one side of the outer shell (2). The connecting wire (71) is located inside the wire shell (12). The wire shell (12) is slidably connected to a movable shell (13). A second elastic element is provided between the wire shell (12) and the movable shell (13). The movable shell (13) is provided with an external thread on the side away from the outer shell (2). The movable shell (13) is threadedly connected to a rotating shell (14) through its external thread. The rotating shell (14) is rotatably connected to a pressing shell (15). A plurality of pressing blocks (16) are circumferentially evenly distributed on the side of the movable shell (13) near its external thread. The pressing shell (15) is used to press the pressing blocks (16).

5. A photovoltaic junction box with a temperature monitoring structure according to claim 4, characterized in that, The several extrusion blocks (16) that are evenly distributed in the circumference are all in an inclined state.

6. A photovoltaic junction box with a temperature monitoring structure according to claim 5, characterized in that, The conductor shell (12) has several fastening shells (17) fixed inside, the connecting wire (71) passes through the fastening shell (17), and the fastening shell (17) is in contact with the connecting wire (71).

7. A photovoltaic junction box with a temperature monitoring structure according to claim 6, characterized in that, The fastening shell (17) is made of an elastic deformable material and is frustoconical. The diameter of the fastening shell (17) on the side closer to the outer shell (2) is smaller than the diameter on the side farther away from the outer shell (2).

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