Photovoltaic junction box based on current detection

Abstract

The utility model discloses a photovoltaic junction box based on current detection, which comprises a box body with a cavity, a conductive current carrying body group and a diode group connected with the current carrying body group are arranged in the box body, two ends of the current carrying body group are respectively connected with cables, and the photovoltaic junction box is characterized by further comprising a monitoring device used for monitoring current values. The protection device is used for controlling on-off of current; according to the utility model, the monitoring device and the protection device are arranged, the current detection module monitors the current value of the current carrying body group in real time and feeds back the current information to the controller, the controller compares the current value with a preset current threshold value, and if the current value exceeds the current threshold value, the controller controls the driver to start; under the driving of the driver, the insulator separates the originally abutted conductive blocks, so that the switching mechanism is disconnected, the current carrier group is disconnected from the cable, the connection between the photovoltaic module and external equipment is cut off in time, and the effects of current detection and overcurrent protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, in particular to a photovoltaic junction box based on current detection. Background Art

[0002] A photovoltaic junction box is a device for connecting and protecting photovoltaic modules. The photovoltaic junction box includes a box body, a carrier fluid group, a diode group, cable wires and other structures. The box body is fixed on the back plate of the photovoltaic module. The leads of the photovoltaic module are connected to the carrier fluid group, and the cable wires are connected to external devices, so as to conduct the current generated by the photovoltaic module to the external devices. Patent No. ZL201610503556.1 discloses a junction box for photovoltaic modules. The measuring end is electrically connected to the signal lead-out part of the junction box to obtain the measured voltage to be measured in the junction box. The judging unit is used to judge whether the photovoltaic module is abnormal according to the measured voltage obtained by the measuring end and the ideal voltage. By leading out the wiring part in the junction box to obtain the voltage thereon, and further comparing it with the ideal voltage, it is judged whether the photovoltaic module is abnormal. Although the scheme mentioned in the above patent can monitor the voltage of the junction box in real time and give a feedback prompt in time when the voltage is abnormal, it lacks a protection device and cannot cut off the connection between the photovoltaic module and the external device in time, so it fails to play a protective role. Summary of the Invention

[0003] The purpose of the utility model is to solve the deficiencies in the prior art and propose a photovoltaic junction box based on current detection.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A photovoltaic junction box based on current detection includes a box body with a cavity. Inside the box body, a conductive carrier fluid group is installed, as well as a diode group connected to the carrier fluid group. Cable wires are respectively connected to both ends of the carrier fluid group. It is characterized in that: it further includes a monitoring device for monitoring the current value, and a protection device for controlling the on-off of the current;

[0006] The monitoring device includes a controller installed inside the box body, and a current detection module connected to the controller. The current detection module is connected to the carrier fluid group; the protection device includes a switching mechanism connected between the carrier fluid group and the cable wire, and a driver connected to the controller;

[0007] The switching mechanism includes two conductive blocks arranged oppositely, and an insulator separating the two conductive blocks. The inner sides of the two conductive blocks are in contact with each other, and the outer sides are respectively connected to the carrier fluid group and the cable wire. The insulator is connected to the driver and is movably connected between the two conductive blocks.

[0008] Preferably, the carrier fluid group includes a plurality of carrier fluids arranged at intervals, the diode group includes a plurality of diodes connected in series in the same direction, the diodes are arranged in a matching manner with the carrier fluids, and adjacent carrier fluids are connected by diodes.

[0009] Preferably, the current detection module includes a Hall effect sensor connected to the controller. The Hall effect sensor is connected to the carrier fluid group and is arranged corresponding to the overall diode group. A display screen connected to the controller is provided outside the box body.

[0010] Preferably, the current detection module includes a current shunt connected to the controller. The current shunt is connected to the carrier fluid group and is arranged corresponding to a single diode. Indicator lights corresponding one by one to the current shunt are provided outside the box body, and the indicator lights are connected to the controller.

[0011] Preferably, the monitoring device further includes a communication module connected to the controller and a control platform for remote monitoring. The controller is signal-connected to the control platform through the communication module.

[0012] Preferably, the conductive block is telescopically arranged and symmetrically distributed. A return spring is connected to the outside of the conductive block, and a guiding surface for making movable contact with the insulator is provided inside the conductive block.

[0013] Preferably, the guiding surface has a V-shaped groove structure and is located at the middle position inside the conductive block. The insulator has a rhombic prism structure and is mutually matched with the guiding surface. The insulator is rotatably connected between the guiding surfaces of the two conductive blocks.

[0014] Preferably, the driver includes a micro motor for driving the insulator to rotate horizontally. The micro motor is respectively connected to the insulator and the controller.

[0015] Preferably, the guiding surface has an inclined surface structure and is located at the top position inside the conductive block. The insulator has a V-shaped convex structure and is mutually matched with the guiding surface. The insulator is movably inserted between the guiding surfaces of the two conductive blocks.

[0016] Preferably, the driver includes a telescopic cylinder for driving the insulator to expand and contract vertically. The telescopic cylinder is respectively connected to the insulator and the controller.

[0017] The utility model has the following beneficial effects:

[0018] The utility model realizes the effects of current detection and overcurrent protection by setting a monitoring device and a protection device. The current detection module monitors the current value of the current-carrying body group in real time, feeds back the current information to the controller, and the controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the driver to start. Under the drive of the driver, the insulator separates the originally abutted conductive blocks, so that the switching mechanism is disconnected, and the current-carrying body group is disconnected from the cable, timely cutting off the connection between the photovoltaic module and the external device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the photovoltaic junction box described in the utility model

[0020] Figure 2 It is a schematic module diagram of the photovoltaic junction box described in the utility model

[0021] Figure 3 It is a schematic structural diagram of a kind of switching mechanism described in the utility model Figure 1

[0022] Figure 4 It is a schematic structural diagram of a kind of switching mechanism described in the utility model Figure 2

[0023] Figure 5 It is a schematic structural diagram of another kind of switching mechanism described in the utility model Figure 1

[0024] Figure 6 It is a schematic structural diagram of another kind of switching mechanism described in the utility model Figure 2

[0025] BRIEF DESCRIPTION OF THE DRAWINGS: Box body 1, cable 2, driver 3, conductive block 4, insulator 5, current-carrying body 6, diode 7, return spring 8, guide surface 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0027] Refer to Figures 1 to 6 , an embodiment provided by the present utility model:

[0028] A photovoltaic junction box based on current detection includes a box body 1 with a cavity. Inside the box body 1, a conductive current-carrying fluid group is installed, as well as a diode group connected to the current-carrying fluid group. Cable lines 2 are respectively connected to both ends of the current-carrying fluid group. It also includes a monitoring device for monitoring current values and a protection device for controlling the on-off of the current.

[0029] The monitoring device includes a controller installed inside the box body 1 and a current detection module connected to the controller. The current detection module is connected to the current-carrying fluid group. The protection device includes a switching mechanism connected between the current-carrying fluid group and the cable line 2 and a driver 3 connected to the controller.

[0030] The switching mechanism includes two conductive blocks 4 arranged facing each other and an insulator 5 separating the two conductive blocks 4. The inner sides of the two conductive blocks 4 are in contact with each other, and the outer sides are respectively connected to the current-carrying fluid group and the cable line 2. The insulator 5 is connected to the driver 3 and is movably connected between the two conductive blocks 4.

[0031] The photovoltaic junction box is fixed on the back panel of the photovoltaic module. The lead of the photovoltaic module is connected to the current-carrying fluid group, and the cable line 2 is connected to an external device, thereby conducting the current generated by the photovoltaic module to the external device. The box body 1 is the main part of the photovoltaic junction box and has a cavity for accommodating components inside. The current-carrying fluid group is made of a conductive material and is fixed inside the box body 1 to play a role in transmitting current. It can include several current-carrying fluids 6 arranged at intervals. Both ends of the current-carrying fluid group respectively correspond to the positive pole and the negative pole. The diode group is connected to the current-carrying fluid group and can include multiple diodes 7 connected in series in the same direction. The diodes 7 are arranged in a matching manner with the current-carrying fluids 6, and adjacent current-carrying fluids 6 are connected through diodes 7. The cable line 2 is connected to both ends of the current-carrying fluid group.

[0032] The monitoring device is used to monitor current values. The controller is installed inside the box body 1. The current detection module is respectively connected to the controller and the current-carrying fluid group. It can be that the current detection module is respectively connected to both ends of the current-carrying fluid group to correspondingly detect the current values at both ends of the diode group. The controller can be a single-chip microcomputer with functions of information reception, information sending, numerical comparison, and switch control. The current detection module can be a Hall effect sensor with a current detection function. It collects the current values of the current-carrying fluid group and then feeds back the current information to the controller. The controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the protection device to start.

[0033] The protection device is used to control the on-off of the current. The switching mechanism is located between the carrier fluid group and the cable 2. One end of the switching mechanism is connected to the carrier fluid group, and the other end is connected to the cable 2. The driver 3 is connected to the controller and can be a micro motor, which is used to drive the insulator 5 to move, and the insulator 5 changes the connection relationship between the two conductive blocks 4. The switching mechanism includes a switch box for installing the conductive blocks 4, and the conductive blocks 4 are slidably connected in the switch box. There are two conductive blocks 4 arranged opposite to each other and made of conductive material. The two conductive blocks 4 are symmetrically distributed and telescopically arranged, and the two conductors can approach and move away from each other. The outer side of one conductive block 4 is connected to the carrier fluid group, and the outer side of the other conductive block 4 is connected to the cable 2. Under normal conditions, the inner sides of the two conductive blocks 4 abut against each other, the switching mechanism is turned on, and the carrier fluid group is connected to the cable 2. When an abnormal situation occurs, under the drive of the driver 3, the insulator 5 is movably connected to the two conductive blocks 4. It can be that the insulator 5 is inserted into the inner sides of the two conductive blocks 4 to separate the originally abutting conductive blocks 4 from each other, the switching mechanism is turned off, and the carrier fluid group is disconnected from the cable 2.

[0034] Working principle:

[0035] The photovoltaic module is connected to external equipment through a photovoltaic junction box. Among them, the photovoltaic module is connected to the carrier fluid group, the carrier fluid group is connected to the diode group, the carrier fluid group is connected to the switching mechanism, the switching mechanism is connected to the cable 2, and the cable 2 is connected to external equipment. Under normal conditions, the conductive blocks 4 abut against each other, the switching mechanism is turned on, and the carrier fluid group is connected to the cable 2. At the same time, the current detection module collects the current value of the carrier fluid group, and then feeds back the current information to the controller. The controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the driver 3 to start. Under the drive of the driver 3, the insulator 5 separates the two conductive blocks 4, the switching mechanism is turned off, and the carrier fluid group is disconnected from the cable 2, so as to control the disconnection of the connection between the carrier fluid group and the cable 2 and achieve the effects of current detection and overcurrent protection.

[0036] In this utility model, by setting up a monitoring device and a protection device, the current detection module monitors the current value of the carrier fluid group in real time, feeds back the current information to the controller, and the controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the driver 3 to start. Under the drive of the driver 3, the insulator 5 separates the originally abutting conductive blocks 4, so that the switching mechanism is turned off and the carrier fluid group is disconnected from the cable 2, timely cutting off the connection between the photovoltaic module and the external equipment, and achieving the effects of current detection and overcurrent protection.

[0037] In this embodiment, preferably, the carrier fluid group includes a plurality of carrier fluids 6 arranged at intervals, the diode group includes a plurality of diodes 7 connected in series in the same direction, the diodes 7 are arranged in a matching manner with the carrier fluids 6, and adjacent carrier fluids 6 are connected through diodes 7.

[0038] A plurality of current carriers 6 are arranged at intervals and fixedly connected inside the box body 1. The current carriers 6 are made of a conductive material. A plurality of diodes 7 are arranged in series in the same direction, matching the number of the current carriers 6 and corresponding in position. The adjacent current carriers 6 are connected by the diodes 7. The plurality of current carriers 6 may include a current input body and a current output body, corresponding to both ends of the current carrier group, and are used for connecting with the cable 2. The current enters from the current input body and flows out from the current output body after passing through a plurality of diodes 7 connected in series in the same direction.

[0039] In this embodiment, preferably, the current detection module includes a Hall effect sensor connected to the controller. The Hall effect sensor is connected to the current carrier group and is correspondingly arranged with the overall diode group. A display screen connected to the controller is provided outside the box body 1.

[0040] The current detection module uses a Hall effect sensor and has a current detection function. The Hall effect sensor is connected to the controller, the Hall effect sensor is connected to the current carrier group, and is correspondingly arranged with the overall diode group, and can detect the current value of the overall diode group. The display screen is installed outside the box body 1 and can be embedded on the surface of the box body 1. The display screen is connected to the controller, and the display screen can display the current value. The Hall effect sensor monitors the current value of the overall diode group in real time, feeds back the current information to the controller, the controller sends the current information to the display screen, and the display screen displays the current value.

[0041] In this embodiment, preferably, the current detection module includes a current shunt connected to the controller. The current shunt is connected to the current carrier group and is correspondingly arranged with a single diode 7. Indicators corresponding one by one to the current shunts are provided outside the box body 1, and the indicators are connected to the controller.

[0042] The current detection module uses a current shunt and has a current detection function. The current shunt is connected to the controller, the current shunt is connected to the current carrier group, and is correspondingly arranged with a single diode 7, and can detect the current value of a single diode 7. A plurality of indicators are installed outside the box body 1 and can be embedded on the surface of the box body 1. The indicators are connected to the controller, and the indicators correspond one by one to the current shunts, which is equivalent to corresponding one by one to a single diode 7. The indicators at least include two colors of red and green. If the indicator is green, it means that the current value is within the normal value range. If the indicator is red, it means that the current value exceeds the preset current threshold. The current shunt monitors the current value of a single diode 7 in real time, feeds back the current information to the controller, the controller sends the current information to the indicators, and the indicators indicate whether each diode 7 is in an abnormal state through the color.

[0043] In this embodiment, preferably, the monitoring device further includes a communication module connected to the controller and a control platform for remote monitoring. The controller is signal-connected to the control platform through the communication module.

[0044] The communication module can adopt the wifi communication method and has a wireless transmission function. The control platform, as the management system of the photovoltaic module, has a remote monitoring function. The communication module is connected to the controller, and the controller is signal-connected to the control platform through the communication module. The current detection module collects the current value of the current-carrying body group and then feeds back the current information to the controller. The controller transmits the current information to the control platform through the communication module. The staff can view the working status of each photovoltaic junction box in real time through the control platform and go to deal with it in time when abnormal situations occur.

[0045] In this embodiment, preferably, the conductive blocks 4 are telescopically arranged and symmetrically distributed. A return spring 8 is connected to the outside of the conductive blocks 4, and a guiding surface 9 for movably contacting the insulator 5 is provided inside the conductive blocks 4.

[0046] The switch box is arranged inside the box body 1. The conductive blocks 4 are installed in the switch box and are slidably connected to the switch box. The two conductive blocks 4 are symmetrically arranged and telescopically move towards each other, and they can approach and separate from each other. The return spring 8 is connected to the outside of the conductive blocks 4 and is located between the conductive blocks 4 and the switch box. In the normal state, the return spring 8 is in a relaxed state. Driven by the spring force, the inner sides of the two conductive blocks 4 are in contact with each other, the switch mechanism is turned on, and the current-carrying body group is connected to the cable 2. The guiding surface 9 is in movable contact with the insulator 5 and is located inside the conductive blocks 4. When an abnormal situation occurs, under the drive of the driver 3, the insulator 5 is cooperatively connected with the guiding surface 9, so that the originally contacting conductive blocks 4 are separated from each other, the switch mechanism is turned off, and the current-carrying body group is disconnected from the cable 2.

[0047] In this embodiment, preferably, the guiding surface 9 has a V-shaped groove structure and is located in the middle position inside the conductive blocks 4. The insulator 5 has a rhombic prism structure and is matched with the guiding surface 9. The insulator 5 is rotatably connected between the guiding surfaces 9 of the two conductive blocks 4.

[0048] The guiding surface 9 is located in the middle position inside the conductive block 4 and has a V-shaped groove structure. The V-shaped groove is arranged vertically, with two vertically arranged contact surfaces, and the two contact surfaces form a certain angle. After the guiding surfaces 9 of the two conductive blocks 4 are combined, a diamond-shaped hole matching the shape of the insulator 5 is formed. The insulator 5 has a diamond-shaped column structure and is arranged vertically. The cross-section of the insulator 5 is a diamond-shaped structure, and the lengths of the two diagonals of the diamond are not equal, corresponding to two opposite acute angles and obtuse angles respectively. The insulator 5 is inserted between the guiding surfaces 9 of the two conductive blocks 4. The four side walls of the insulator 5 are attached to the side walls of the two guiding surfaces 9, and the insulator 5 and the two guiding surfaces 9 can rotate relative to each other. It can be understood that in the normal state, the inner sides of the two conductive blocks 4 are in contact with each other, the guiding surfaces 9 of the two conductive blocks 4 are combined into a diamond-shaped hole, the insulator 5 is inserted into the diamond-shaped hole, the switch mechanism is turned on, and the current-carrying body group is connected to the cable 2. When an abnormal situation occurs, under the drive of the driver 3, the insulator 5 is located in the diamond-shaped hole, and the insulator 5 rotates relative to the guiding surface 9 by an angle of 90 degrees. The insulator 5 pushes the conductive block 4 outward, causing the originally contacting conductive blocks 4 to separate from each other, the switch mechanism is turned off, and the current-carrying body group is disconnected from the cable 2.

[0049] In this embodiment, preferably, the driver 3 includes a micro motor for driving the horizontal rotation of the insulator 5. The micro motor is respectively connected to the insulator 5 and the controller.

[0050] The micro motor is installed in the switch box. The micro motor is coaxially connected to the insulator 5 to drive the horizontal rotation of the insulator 5, and the micro motor is connected to the controller. The current detection module collects the current value of the current-carrying body group and then feeds back the current information to the controller. The controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the micro motor to start. The insulator 5 rotates relative to the guiding surfaces 9 of the two conductive blocks 4, and the insulator 5 pushes the conductive block 4 outward, causing the originally contacting conductive blocks 4 to separate from each other, the switch mechanism is turned off, and the current-carrying body group is disconnected from the cable 2, achieving the effect of overcurrent protection.

[0051] In this embodiment, preferably, the guiding surface 9 has an inclined surface structure and is located at the top position inside the conductive block 4. The insulator 5 has a V-shaped convex structure and matches the guiding surface 9. The insulator 5 is movably inserted between the guiding surfaces 9 of the two conductive blocks 4.

[0052] The guiding surface 9 is located at the top inside the conductive block 4 and has an inclined surface structure, which is inclined downward. The insulator 5 has a V-shaped convex structure and includes two symmetrically arranged contact surfaces. The contact surfaces match the guiding surface 9 and have the same slope, and relative sliding can occur between the two. The insulator 5 is movably inserted between the guiding surfaces 9 of the two conductive blocks 4. The insulator 5 is in contact with the two guiding surfaces 9, and relative sliding can occur between the insulator 5 and the two guiding surfaces 9. It can be understood that in the normal state, the inner sides of the two conductive blocks 4 are in contact with each other, the guiding surfaces 9 of the two conductive blocks 4 are combined into a V-shaped groove, the insulator 5 is aligned with the V-shaped groove, the switch mechanism is turned on, and the current-carrying group is connected to the cable 2. When an abnormal situation occurs, under the drive of the driver 3, the insulator 5 is inserted into the V-shaped groove. The insulator 5 slides relative to the guiding surface 9, and the insulator 5 pushes the conductive block 4 outward, causing the originally contacting conductive blocks 4 to separate from each other. The switch mechanism is turned off, and the current-carrying group is disconnected from the cable 2.

[0053] In this embodiment, preferably, the driver 3 includes a telescopic electric cylinder for driving the insulator 5 to expand and contract vertically. The telescopic electric cylinder is respectively connected to the insulator 5 and the controller.

[0054] The telescopic electric cylinder is installed in the switch box. The telescopic electric cylinder is coaxially connected to the insulator 5 to drive the insulator 5 to expand and contract vertically. The telescopic electric cylinder is connected to the controller. The current detection module collects the current value of the current-carrying group and then feeds back the current information to the controller. The controller compares the current value with a preset current threshold. If the current value exceeds the current threshold, the controller controls the telescopic electric cylinder to start. The insulator 5 slides relative to the guiding surfaces 9 of the two conductive blocks 4, and the insulator 5 pushes the conductive block 4 outward, causing the originally contacting conductive blocks 4 to separate from each other. The switch mechanism is turned off, and the current-carrying group is disconnected from the cable 2, achieving the effect of overcurrent protection.

[0055] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic junction box based on current detection, comprising a box body with a cavity, a conductive current-carrying body group installed inside the box body, and a diode group connected to the current-carrying body group. Cable lines are respectively connected to both ends of the current-carrying body group, and it is characterized in that: It also includes a monitoring device for monitoring the current value and a protection device for controlling the on / off of the current; The monitoring device includes a controller installed inside the box body and a current detection module connected to the controller. The current detection module is connected to the carrier fluid group; the protection device includes a switching mechanism connected between the carrier fluid group and the cable, and a driver connected to the controller; The switching mechanism includes two oppositely arranged conductive blocks and an insulator that separates the two conductive blocks. The inner sides of the two conductive blocks are in contact with each other, and the outer sides are respectively connected to the carrier fluid group and the cable. The insulator is connected to the driver and is movably connected between the two conductive blocks.

2. The photovoltaic junction box based on current detection according to claim 1, wherein: The carrier fluid group includes a number of carrier fluids arranged at intervals. The diode group includes a plurality of diodes connected in series in the same direction. The diodes are arranged in a matching manner with the carrier fluids, and adjacent carrier fluids are connected by diodes.

3. The photovoltaic junction box based on current detection according to claim 2, wherein: The current detection module includes a Hall effect sensor connected to the controller. The Hall effect sensor is connected to the carrier fluid group and is arranged corresponding to the overall diode group. A display screen connected to the controller is provided outside the box body.

4. The photovoltaic junction box based on current detection according to claim 2, wherein: The current detection module includes a current shunt connected to the controller. The current shunt is connected to the carrier fluid group and is arranged corresponding to a single diode. An indicator light corresponding one-to-one to the current shunt is provided outside the box body, and the indicator light is connected to the controller.

5. The photovoltaic junction box based on current detection according to claim 2, characterized in that: The monitoring device further includes a communication module connected to the controller and a control platform for remote monitoring. The controller is signal-connected to the control platform through the communication module.

6. The photovoltaic junction box based on current detection according to claim 1, characterized in that: The conductive blocks are telescopically arranged and symmetrically distributed. A return spring is connected to the outside of the conductive blocks, and a guiding surface for movably contacting the insulator is provided on the inner side of the conductive blocks.

7. The photovoltaic junction box based on current detection according to claim 6, characterized in that: The guiding surface has a V-shaped groove structure and is located in the middle position on the inner side of the conductive block. The insulator has a rhombic prism structure and is mutually matched with the guiding surface. The insulator is rotatably connected between the guiding surfaces of the two conductive blocks.

8. The photovoltaic junction box based on current detection according to claim 7, characterized in that: The driver includes a micro motor for driving the horizontal rotation of the insulator. The micro motor is respectively connected to the insulator and the controller.

9. The photovoltaic junction box based on current detection according to claim 6, wherein: The guiding surface has an inclined surface structure and is located at the top position on the inner side of the conductive block. The insulator has a V-shaped convex structure and is mutually matched with the guiding surface. The insulator is movably inserted between the guiding surfaces of the two conductive blocks.

10. The photovoltaic junction box based on current detection according to claim 9, wherein: The driver includes a telescopic electric cylinder for driving the vertical expansion and contraction of the insulator. The telescopic electric cylinder is respectively connected to the insulator and the controller.

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