Detection device, photovoltaic equipment and power system

Abstract

The utility model provides a detection device, photovoltaic equipment and a power system, and relates to the technical field of signal detection.The detection device comprises a case, a detection circuit board, a current sensor and a connecting terminal, the detection circuit board is located in the case and is spaced from a wall plate of the case, and the connecting terminal penetrates through the wall plate and is electrically connected with the detection circuit board; the current sensor is located between the wall plate and the detection circuit board. According to the detection device disclosed by the invention, the current sensor can be arranged between the wall plate and the detection circuit board by utilizing the space which needs to be reserved between the detection circuit board and the wall plate when the detection circuit board is arranged, so that the internal space of the case can be effectively utilized on the basis of performing signal detection on the current transmitted by the connecting terminal; the integrated and miniaturized design of the detection device is facilitated, the length of a cable needing to be led out of the connecting terminal can be shortened, even the cable does not need to be led out, the electromagnetic stability in the case is effectively improved, and the working stability of the detection device is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of signal detection, and more particularly, to a detection device, a photovoltaic device, and a power system. Background Art

[0002] In a power system, a direct current obtained through a structure such as a photovoltaic panel is converted by an inverter to output an alternating current for use. In this process, to ensure the stability of current conversion and transmission, a detection device is usually provided to achieve real-time monitoring of signals such as current or voltage.

[0003] Currently, the structure of the detection device is relatively complex. When performing real-time monitoring of signals, the current will flow over a long distance inside the detection device. Due to the electromagnetic effect, the long-distance flowing current is likely to have an adverse impact on the electromagnetic stability inside the chassis, thereby affecting the working stability of the detection device. Summary of the Utility Model

[0004] The problem solved by the present disclosure is how to improve the electromagnetic stability inside the chassis while realizing signal detection of the current transmitted by the connection terminal.

[0005] To solve the above problems, the present disclosure provides a detection device, a photovoltaic device, and a power system.

[0006] In a first aspect, the present disclosure provides a detection device, which is characterized by including a chassis, a detection circuit board, a current sensor, and a connection terminal. The detection circuit board is located inside the chassis and is spaced apart from the wall plate of the chassis. The connection terminal penetrates through the wall plate and is electrically connected to the detection circuit board. The current sensor is located between the wall plate and the detection circuit board.

[0007] Optionally, the current sensor includes a housing and a signal detection element. A central hole is formed through the housing to form an annular structure. The housing is installed on the detection circuit board. The signal detection element is located inside the housing. The connection terminal penetrates through the central hole to be electrically connected to the detection circuit board.

[0008] Optionally, a through hole is provided on the wall plate. The connection terminal includes a connection portion and a limiting portion. The connection portion penetrates through the through hole and the central hole and is electrically connected to the detection circuit board. The limiting portion is attached to the end face of the wall plate facing the housing and is connected to the connection portion.

[0009] Optionally, the connection terminal is fixedly connected to the detection circuit board, or the connection portion is detachably connected to the detection circuit board, and the limiting portion is fixedly connected to the wall plate.

[0010] Optionally, on the plane where the wall panel is located, the projection of the connecting portion is circular, the projection of the limiting portion is annular, and both are concentrically arranged with the projection contour of the through hole.

[0011] Optionally, a temperature sensor is provided on the connection terminal. The temperature sensor is located at the electrical connection between the connection terminal and the detection circuit board and is electrically connected to the detection circuit board.

[0012] Optionally, the signal detection element includes a direct current signal detection element and / or an arcing signal detection element.

[0013] Optionally, an insulating layer is covered on the housing.

[0014] In a second aspect, the present disclosure provides a photovoltaic device including the detection device described above.

[0015] In a third aspect, the present disclosure provides a power system including the detection device described above, or including the photovoltaic device described above.

[0016] The beneficial effects of a detection device, a photovoltaic device, and a power system of the present disclosure are as follows: A chassis is provided as a protective structure of the detection device to prevent the working stability of the detection device from being affected by external factors of the chassis. At the same time, a detection circuit board is provided inside the chassis, and a connection terminal penetrates through the wall panel to be electrically connected to the detection circuit board. The detection circuit board can perform signal detection through the current introduced through the connection terminal. The detection circuit board is spaced from the wall panel of the chassis, which is convenient for the connection terminal to penetrate into the chassis from the wall panel closest to the detection circuit board for electrical connection, shortening the access length of the connection terminal, and can also prevent faults such as short circuits caused by the contact between the detection circuit board and the wall panel. On this basis, by using the space reserved between the wall panel and the detection circuit board when the detection circuit board is arranged, the current sensor is arranged between the wall panel and the detection circuit board. On the basis of realizing signal detection of the current transmitted by the connection terminal, the internal space of the chassis can be effectively utilized, which is beneficial to the integrated and miniaturized design of the detection device. Also, since the electrical connection terminal passes through the current sensor after penetrating into the chassis, the length of the cable that the connection terminal needs to lead out can be shortened or even no cable needs to be led out, thereby effectively improving the electromagnetic stability inside the chassis and enhancing the working stability of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the detection device from one perspective in an embodiment of the present disclosure;

[0018] Figure 2 is Figure 1 an enlarged schematic diagram of A shown in

[0019] Figure 3 is an exploded schematic diagram of the detection device in an embodiment of the present disclosure;

[0020] Figure 4 is Figure 3 An enlarged schematic diagram of B shown therein;

[0021] Figure 5 An assembly schematic diagram of the detection circuit board, the connection terminal and the current sensor in the embodiment of the present disclosure.

[0022] Description of reference numerals:

[0023] 1. Chassis; 11. Wall panel; 111. Through hole; 2. Detection circuit board; 3. Current sensor; 31. Central hole; 4. Connection terminal; 41. Connection part; 42. Limiting part. Detailed implementation manners

[0024] In order to make the above objects, features and advantages of the present disclosure more obvious and understandable, the following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the accompanying drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0025] The Z-axis in the drawings represents the vertical direction, that is, the up-and-down position, and the positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side; the X-axis in the drawings represents the horizontal direction and is specified as the front-and-back position, and the positive direction of the X-axis represents the front side, and the negative direction of the X-axis represents the rear side; the Y-axis in the drawings represents the left-and-right position, and the positive direction of the Y-axis represents the right side, and the negative direction of the Y-axis represents the left side. At the same time, it should be noted that the above-mentioned meanings represented by the Z-axis, Y-axis and X-axis are only for facilitating the description of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present disclosure.

[0026] The term "including" and its variants used herein are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiment". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or mutual dependence relationship of the functions performed by these devices, modules or units.

[0027] It should be noted that the modifications of "one" and "multiple" mentioned in this disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0028] In the related art, in a power system such as a photovoltaic power generation system, photovoltaic devices convert solar energy into electrical energy through photovoltaic panels and output it as direct current, while the power grid of the power system transmits alternating current. At this time, an inverter is required to convert the direct current into alternating current and then input it into the power grid for power transmission. For example, string inverters used in distributed photovoltaics; during the use of the inverter, if parameters such as current and voltage exceed the preset parameters of the inverter, it may cause damage to the inverter or even paralysis of the entire photovoltaic device. Therefore, a detection device is usually used to perform string input detection on the photovoltaic device, and real-time monitoring of the string transmission of the photovoltaic device is achieved through the obtained current signal or voltage signal. Currently, the detection device is composed of connection terminals such as on-board PV (Photovoltaic) terminals, a chassis, and a detection circuit structure located inside the chassis, such as a string detection PCB (Printed Circuit Board). The string detection PCB is disposed inside the chassis and is located at one side wall of the chassis, facilitating connection with the on-board PV terminals that penetrate through the wall outside the chassis, thereby achieving string input detection. At this time, the on-board PV terminals transmit current to the string detection PCB, and the on-board PV terminals also have an extreme value for the current they can carry. When the extreme value is exceeded, arcing will occur, causing damage to the detection device or even paralysis of the connected photovoltaic device. Therefore, a current sensor is generally provided inside the chassis to detect the current of the on-board PV terminals; however, since the current sensor is usually disposed on the side of the string detection PCB away from the wall, and the on-board PV terminals are directly connected to the string detection PCB after penetrating into the chassis, it is necessary to lead out a cable from the on-board PV terminals, pass through or bypass the string detection PCB, and then extend to the current sensor, so that the current sensor can detect the current in the cable to achieve the current detection of the on-board PV terminals. In this way, when the current sensor is working, the current flowing in the cable is likely to have an adverse impact on the electromagnetic stability inside the chassis due to the electromagnetic effect, thereby affecting the working stability of the detection device.

[0029] In view of the problems existing in the above related art, this embodiment provides a detection device, a photovoltaic device, and a power system.

[0030] As Figure 1As shown, a detection device provided by an embodiment of the present disclosure includes a chassis 1, a detection circuit board 2, a current sensor 3 and a connecting terminal 4. The detection circuit board 2 is located inside the chassis 1 and is spaced apart from the wall panel 11 of the chassis 1. The connecting terminal 4 passes through the wall panel 11 and is electrically connected to the detection circuit board 2. The current sensor 3 is located between the wall panel 11 and the detection circuit board 2.

[0031] Specifically, if Figure 1 As shown, the wall panel 11 spaced apart from the detection circuit board 2 means that when the chassis 1 is placed on a horizontally parallel XY plane, the wall panel 11 of the chassis 1 is horizontally arranged, that is, perpendicular to the Z axis, and the detection circuit board 2 and the wall panel 11 are parallel to each other; the electrical connection between the connecting terminal 4 and the detection circuit board 2 means that the pin on the connecting terminal 4 is connected to the detection circuit on the detection circuit board 2; the current sensor 3 is used to obtain a DC current signal and can be electrically connected to the detection circuit board 2. The detection circuit board 2 can detect the current signal through the current sensor 3.

[0032] In this embodiment, a chassis 1 is provided as a protective structure for the detection device to prevent the working stability of the detection device from being affected by factors outside the chassis 1. At the same time, a detection circuit board 2 is provided in the chassis 1, and a connection terminal 4 is provided to penetrate the wall plate 11 and electrically connect with the detection circuit board 2. The detection circuit board 2 can realize signal detection by the current input through the connection terminal 4. The detection circuit board 2 is spaced apart from the wall plate 11 of the chassis 1, which can facilitate the connection terminal 4 to penetrate the wall plate 11 closest to the detection circuit board 2 for electrical connection, shorten the access length of the connection terminal 4, and avoid the detection circuit board 2 from contacting the wall plate 11 and causing a short circuit. On this basis, the current sensor 3 is set between the wall panel 11 and the detection circuit board 2 by utilizing the space between the detection circuit board 2 and the wall panel 11 that needs to be reserved when the detection circuit board 2 is set. On the basis of realizing signal detection of the current transmitted by the connection terminal 4, the internal space of the chassis 1 can be effectively utilized, which is beneficial to the integrated and miniaturized design of the detection device. Moreover, since the electrical connection terminal 4 passes through the current sensor 3 first after passing through the chassis 1, the length of the cable that needs to be led out of the connection terminal 4 can be shortened or even no cable needs to be led out, thereby effectively improving the electromagnetic stability in the chassis 1 and enhancing the working stability of the detection device.

[0033] like Figures 2 to 4 As shown, the current sensor 3 includes a shell and a signal detection element. A center hole 31 is set through the shell to form a ring structure. The shell is installed on the detection circuit board 2. The signal detection element is located inside the shell. The connecting terminal 4 passes through the center hole 31 to be electrically connected to the detection circuit board 2.

[0034] Specifically, if Figure 4As shown in the figure, the housing is mounted on the detection circuit board 2, and is fixedly connected to the detection circuit board 2 by welding; the housing of the current sensor 3 is a closed hollow structure, and the shape profile of the cross-section perpendicular to the axial direction on the annular structure of the housing is two concentric circles with different diameters; the signal detection element includes a magnetic core, a Hall element and an electromagnetic coil. The magnetic core is an arc-shaped structure, the Hall element is located between the two ends of the arc-shaped structure, and the electromagnetic coil is wound around the magnetic core and electrically connected to the Hall element to detect the current passing through the magnetic core.

[0035] In this alternative embodiment, the housing and the signal detection element are provided to form the current sensor 3. Among them, the housing is an annular structure, and a central hole 31 is formed through the middle thereof. When the connection terminal 4 is electrically connected to the detection circuit board 2, the connection terminal 4 first passes through the central hole 31, so that the connection terminal 4 is electrically connected to the detection circuit board 2 through the shortest path, that is, a straight path, effectively reducing the length of the connection terminal 4 inserted into the chassis 1, further improving the electromagnetic stability in the chassis 1. At the same time, the signal detection element is arranged in the housing. When the connection terminal 4 transmits current, the current can flow along the path of the connection terminal 4 inserted into the chassis 1. At this time, the current will pass through the central hole 31, and the signal detection element can detect the signal of the current passing through the central hole 31, so as to realize the signal detection of the current transmitted by the connection terminal 4; in addition, the housing is mounted on the detection circuit board 2, and the on-board setting of the current sensor 3 can be realized. By moving the detection circuit board 2, the current sensor 3 can be moved, which is convenient for the loading, unloading and maintenance of the detection device.

[0036] As Figure 1 and Figure 3 shown in the figure, a through hole 111 is provided on the wall plate 11. The connection terminal 4 includes a connection portion 41 and a limiting portion 42. The connection portion 41 penetrates through the through hole 111 and the central hole 31 and is electrically connected to the detection circuit board 2. The limiting portion 42 is attached to the end face of the wall plate 11 facing the housing and is connected to the connection portion 41.

[0037] Specifically, as Figure 2 shown in the figure, the through hole 111 extends in the direction perpendicular to the wall plate 11, that is, the X-axis direction. The end face of the wall plate 11 facing the housing is the end face of the wall plate 11 facing the X-axis direction; the limiting portion 42 is located in the middle section of the connection portion 41 along the direction of penetrating through the through hole 111, that is, the X-axis direction.

[0038] In this alternative embodiment, in order to facilitate the installation of the connection terminal 4 into the chassis 1, a through hole 111 is provided on the wall panel 11 of the chassis 1. The through hole 111 connects the inside and outside of the chassis 1. On this basis, a connection portion 41 and a limiting portion 42 are provided to form the connection terminal 4. Among them, the connection portion 41 can penetrate through the through hole 111 and the central hole 31, so as to achieve electrical connection with the detection circuit board 2 at that place, and realize the input of current. The limiting portion 42 can be attached to the end face of the wall panel 11 facing the housing and is connected to the connection portion 41. With such a setting, when assembling the detection device, the connection terminal 4 can be installed from the inside of the chassis 1 to ensure the installation accuracy of the connection terminal 4, that is, the connection portion 41 is passed through the through hole 111 from the inside of the chassis 1. As the connection portion 41 passes through the chassis 1, the limiting portion 42 is attached to the inner end face of the wall panel 11 as the connection portion 41 passes through, thereby limiting the movement of the connection portion 41 and ensuring that the length of the connection portion 41 passing through the chassis 1 meets the requirements, and further realizing the positioning installation of the connection terminal 4.

[0039] As Figure 1 , Figure 2 and Figure 5 shown, the connection terminal 4 is fixedly connected to the detection circuit board 2, or the connection portion 41 is detachably connected to the detection circuit board 2, and the limiting portion 42 is fixedly connected to the wall panel 11.

[0040] Specifically, the fixed connection between the connection terminal 4 and the detection circuit board 2 is welding, that is, the connection terminal 4 is welded on the detection circuit board 2 to achieve electrical connection with the detection circuit board 2; the detachable connection between the connection portion 41 and the detection circuit board 2 is that electrical connection is achieved when the connection portion 41 abuts against the detection circuit board 2, and the electrical connection is released after separation. The fixed connection between the limiting portion 42 and the wall panel 11 is welding.

[0041] In this alternative embodiment, as Figure 5 shown, the connection terminal 4 is fixedly connected to the detection circuit board 2. With such a setting, the on-board setting of the connection terminal 4 can be realized. Moreover, since the housing is installed on the detection circuit board 2, the board-like setting of the current sensor 3 and the connection terminal 4 can be realized at the same time. When assembling the detection device, the detection circuit board 2 can be moved to move the connection terminal 4 and the current sensor 3, and then the overall installation of the detection circuit board 2, the connection terminal 4 and the current sensor 3 can be carried out from the inside of the chassis 1, effectively improving the assembly convenience of the detection device. In other alternative embodiments of the present disclosure, as Figure 1 and Figure 2 shown, the connection portion 41 can also be detachably connected to the detection circuit board 2, and the limiting portion 42 is fixedly connected to the wall panel 11. With such a setting, when assembling the detection device, the installation of the connection terminal 4 can be realized first through the fixed connection between the limiting portion 42 and the wall panel 11 to ensure the accurate positioning of the connection terminal 4, and then the installation of the detection circuit board 2 can be carried out, effectively improving the assembly accuracy of the detection device.

[0042] As Figure 3 and Figure 4 shown, on the plane where the wall panel 11 is located, the projection of the connecting portion 41 is circular, and the projection of the limiting portion 42 is annular, and both are concentrically arranged with the projection contour of the through hole 111.

[0043] Specifically, the annular shape of the projection of the limiting portion 42 is a circular ring or a polygonal ring; as Figure 1 and Figure 3 shown, the plane where the wall panel 11 is located is parallel to the YZ plane.

[0044] In this optional embodiment, on the plane where the wall panel 11 is located, the projection of the connecting portion 41 is circular and is concentrically arranged with the projection contour of the through hole I.e., the connecting portion 41 is a cylindrical structure extending in a direction perpendicular to the wall panel 11, which can facilitate the current transmission between the inside and outside of the chassis 1 through the through hole 111 and improve the stability of the connecting portion 41 penetrating into the through hole 111; at the same time, on the plane where the wall panel 11 is located, the projection of the limiting portion 42 is annular and is also concentrically arranged with the projection contour of the through hole 111, that is, the limiting portion 42 is an annular structure extending in a direction perpendicular to the wall panel 11. At the same time, the limiting portion 42 can accurately abut against the opening edge of the through hole 111 as the connecting portion 41 moves, effectively improving the stability of the limiting portion 42 in limiting the connecting portion 41, and further improving the positioning accuracy when the connecting terminal 4 is installed.

[0045] A temperature sensor is provided on the connecting terminal 4. The temperature sensor is located at the electrical connection between the connecting terminal 4 and the detection circuit board 2 and is electrically connected to the detection circuit board 2.

[0046] Specifically, the end of the connecting terminal 4 has a groove for accommodating pins. The connecting terminal 4 can be electrically connected to the detection circuit board 2 through the pins. The temperature sensor is provided on the connecting terminal 4. The temperature sensor also has pins, and the pins are also located in the groove at the end of the connecting terminal 4. The temperature sensor is also electrically connected to the detection circuit board 2 through the pins.

[0047] In this optional embodiment, when current is input to the connecting terminal 4, heat is easily generated during the current transmission, causing the temperature at the connection between the connecting terminal 4 and the detection circuit board 2 to rise. In order to avoid the influence of excessive temperature on the working stability of the detection device, a temperature sensor is provided on the connecting terminal 4. The temperature sensor is located at the electrical connection between the connecting terminal 4 and the detection circuit board 2, so that the temperature at the connection between the connecting terminal 4 and the detection circuit board 2 can be detected. On this basis, the temperature sensor is electrically connected to the detection circuit board 2, and the detected temperature signal can be transmitted to the detection circuit board 2, facilitating the detection circuit board 2 to upload and convert the detection signal to realize real-time monitoring of the temperature.

[0048] The signal detection element includes a DC current signal detection element and / or an arcing signal detection element.

[0049] Specifically, the current sensor 3 is a DC current sensor; arcing detection is an electrical fault detection method that can be used to detect ground faults or short - circuit faults in a power system. The arcing signal detection element can determine the location and type of the fault by analyzing parameters such as the current, voltage, and time of the arc.

[0050] In this alternative embodiment, a DC current signal detection element can be set as the signal detection element, so as to judge whether there is a fault in the current transmission of the connection terminal 4 by obtaining the current value, ensuring the working stability of the detection device; in this alternative embodiment or other alternative embodiments of the present disclosure, an arcing signal detection element can also be set as the signal detection element, and the location and type of the ground fault or short - circuit fault of the connection terminal 4 for current transmission can be judged by arcing detection, ensuring fault troubleshooting and repair.

[0051] The housing is covered with an insulating layer.

[0052] Specifically, the insulating layer is made of insulating materials such as rubber; the insulating layer and the housing are integrally formed, that is, the housing is made of insulating materials.

[0053] In this alternative embodiment, in order to avoid the external structure of the chassis 1 or the wall plate 11 of the chassis 1 having an adverse effect on the working stability of the current sensor 3 and the working stability of the detection circuit board 2 through the current sensor 3, an insulating layer is covered on the housing of the current sensor 3 to ensure the working stability of the current sensor 3 and the detection circuit board 2.

[0054] A photovoltaic device provided by an embodiment of the present disclosure includes the above - mentioned detection device.

[0055] The beneficial effects of the power system of this embodiment compared with the prior art are the same as those of the above - mentioned detection device, and will not be elaborated here.

[0056] A power system provided by an embodiment of the present disclosure includes the above - mentioned detection device, or includes the above - mentioned photovoltaic device.

[0057] The beneficial effects of the power system of this embodiment compared with the prior art are the same as those of the above - mentioned detection device or the above - mentioned photovoltaic device, and will not be elaborated here.

[0058] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present disclosure.

Claims

1. A detection device, characterized in that, It includes a chassis (1), a detection circuit board (2), a current sensor (3) and connection terminals (4). The detection circuit board (2) is located inside the chassis (1) and is spaced from the wall panel (11) of the chassis (1). The connection terminals (4) penetrate through the wall panel (11) and are electrically connected to the detection circuit board (2). The current sensor (3) is located between the wall panel (11) and the detection circuit board (2).

2. The detection device according to claim 1, characterized in that, The current sensor (3) includes a housing and a signal detection element. A central hole (31) is provided through the housing to form an annular structure. The housing is mounted on the detection circuit board (2). The signal detection element is located inside the housing. The connection terminal (4) penetrates through the central hole (31) to be electrically connected to the detection circuit board (2).

3. The detection device according to claim 2, characterized in that, A through hole (111) is provided on the wall panel (11). The connection terminal (4) includes a connection portion (41) and a limiting portion (42). The connection portion (41) penetrates through the through hole (111) and the central hole (31) and is electrically connected to the detection circuit board (2). The limiting portion (42) is attached to the end face of the wall panel (11) facing the housing and is connected to the connection portion (41).

4. The detection device according to claim 3, characterized in that, The connection terminal (4) is fixedly connected to the detection circuit board (2), or the connection portion (41) is detachably connected to the detection circuit board (2), and the limiting portion (42) is fixedly connected to the wall panel (11).

5. The detection device according to claim 3, wherein On the plane where the wall panel (11) is located, the projection of the connection portion (41) is circular, the projection of the limiting portion (42) is annular, and both are concentrically arranged with the projection contour of the through hole (111).

6. The detection device according to any one of claims 1 to 5, characterized in that, A temperature sensor is provided on the connection terminal (4). The temperature sensor is located at the electrical connection part between the connection terminal (4) and the detection circuit board (2) and is electrically connected to the detection circuit board (2).

7. The detection device according to any one of claims 2 to 5, characterized in that The signal detection element includes a direct current signal detection element and / or an arcing signal detection element.

8. The detection device according to any one of claims 2 to 5, characterized in that, An insulating layer is covered on the housing.

9. A photovoltaic device, characterized in that, It includes the detection device according to any one of claims 1 to 8.

10. A power system, characterized in that, It includes the detection device according to any one of claims 1 to 8, or includes the photovoltaic device according to claim 9.

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