Photovoltaic connector and photovoltaic system

Abstract

The utility model relates to a photovoltaic connector and a photovoltaic system, the photovoltaic connector comprises a positive pole body, a positive pole copper piece, a negative pole body and a negative pole copper piece, and the positive pole body is provided with a first accommodating channel penetrating along the axis of the positive pole body; the positive electrode copper piece is arranged in the first accommodating channel; the negative electrode body is provided with a second accommodating channel penetrating along the axis of the negative electrode body; the cathode copper piece is arranged in the second accommodating channel, and the anode copper piece and the cathode copper piece are inserted to realize electric connection; wherein the positive electrode body is in threaded connection with the negative electrode body. According to the photovoltaic connector, the positive electrode body and the negative electrode body are in threaded connection, and compared with a buckle connection mode, the diameters of the positive electrode body and the negative electrode body can be reduced, so that the diameter of the whole photovoltaic connector is reduced, and the diameter of the photovoltaic connector is smaller than the size of a frame of a photovoltaic module; therefore, the risk that the photovoltaic module and the photovoltaic connector are damaged in the transportation process can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic systems, and particularly to a photovoltaic connector and a photovoltaic system. Background Art

[0002] The photovoltaic connector is a key part for connecting various components, busbars, controllers, inverters, etc. within a photovoltaic power generation system. Generally, the photovoltaic connector is located between the solar cell array composed of solar cell modules and the solar charging control device. The photovoltaic connector includes a connection interface, which is connected to the solar cell array and the solar charging control device through a cable. Its main function is to connect the power generated by the solar cells to the external circuit, thereby conducting the current generated by the solar cells. During the packaging and transportation of photovoltaic modules, due to the large size of the connector, the situation where the connector is squeezed against the front and back of the photovoltaic module occurs, resulting in damage to the module and the connector, which is particularly serious in the case of double-sided glass modules. Summary of the Utility Model

[0003] Based on this, in view of the technical problem that the large size of the connector in the prior art leads to damage to the module and the connector during transportation, it is necessary to provide a photovoltaic connector and a photovoltaic system.

[0004] A photovoltaic connector, the photovoltaic connector comprising:

[0005] A positive electrode body, which is constructed with a first accommodation channel penetrating along the axis of the positive electrode body;

[0006] A positive electrode copper piece, which is arranged in the first accommodation channel;

[0007] A negative electrode body, which is constructed with a second accommodation channel penetrating along the axis of the negative electrode body;

[0008] A negative electrode copper piece, which is arranged in the second accommodation channel, and the positive electrode copper piece is inserted into the negative electrode copper piece to achieve electrical connection;

[0009] Wherein, the positive electrode body is threadedly connected to the negative electrode body.

[0010] In one embodiment, one end of the positive electrode copper piece is provided with an insertion interface, and one end of the negative electrode copper piece opposite to the positive electrode copper piece is constructed as a columnar structure, and the columnar structure is inserted into the insertion interface.

[0011] In one embodiment, the photovoltaic connector further comprises:

[0012] A drum spring, one end of the drum spring is inserted into the insertion interface, and the columnar structure is inserted into the other end of the drum spring.

[0013] In one embodiment, the photovoltaic connector further comprises:

[0014] The first sealing member is arranged between the positive electrode body and the negative electrode body.

[0015] In one embodiment, the photovoltaic connector further includes a retaining connection component, and one retaining connection component is connected to each end of the positive pole body and the negative pole body that are away from each other, and the retaining connection component and the positive pole copper part or the negative pole copper part are mutually limited.

[0016] In one embodiment, the ends of the positive copper piece and the negative copper piece that are away from each other are provided with stop protrusions, and the stop connection assembly includes:

[0017] A stop ring, threadedly connected to the positive electrode body or the negative electrode body, a stop groove is provided on the inner hole wall of the stop ring, and the stop protrusion on the positive electrode copper piece or the negative electrode copper piece cooperates with the stop groove to limit each other;

[0018] The limiting nut is threadedly connected to an end of the stop ring away from the positive electrode body or the negative electrode body.

[0019] In one of the embodiments, the stop protrusion on the positive copper part is arranged as a plurality of square protrusions spaced along the positive copper part, and the height of the square protrusion gradually increases from one end toward the negative copper part toward one end away from the negative copper part; the shape of the stop groove on the stop ring adapted to the positive copper part is adapted to the square protrusion on the positive copper part, and the highest position in the square protrusion and the deepest groove depth in the stop groove are mutually abutted and limited.

[0020] In one of the embodiments, the stop protrusion on the negative copper part is set to be an annular protrusion, and the height of the annular protrusion gradually increases from one end toward the end away from the positive copper part; the shape of the stop groove on the stop ring adapted to the negative copper part is adapted to the stop protrusion on the negative copper part, and the highest position in the stop protrusion and the deepest groove depth in the stop groove are mutually abutted and limited.

[0021] In one embodiment, the anti-retraction connection assembly further includes:

[0022] A second seal, one end of the second seal extends into the inner hole of the limit nut, the other end of the second seal extends into the inner hole of the stop ring, and an annular protrusion in the middle of the second seal is arranged between the limit nut and the stop ring.

[0023] A photovoltaic system comprises the photovoltaic connector as described above.

[0024] Advantages of the present utility model:

[0025] The present utility model provides a photovoltaic connector. By providing a first accommodation channel on the positive electrode body to facilitate accommodating the positive electrode copper part, and a second accommodation channel on the negative electrode body to facilitate accommodating the negative electrode copper part. Among them, the positive electrode copper part and the negative electrode copper part can achieve electrical connection through plugging. The ends of the positive electrode copper part and the negative electrode copper part that are away from each other are used to connect with cables, and the cables are used to connect with photovoltaic modules or external cables, thereby realizing the electrical connection between the photovoltaic module and the external cable. In this application, by connecting the positive electrode body and the negative electrode body in a threaded connection form, compared with the snap connection form, the diameters of the positive electrode body and the negative electrode body can be reduced, thereby reducing the diameter of the entire photovoltaic connector, and further making the diameter of the photovoltaic connector smaller than the size of the frame of the photovoltaic module, so as to effectively reduce the risk of damage to the photovoltaic module and the photovoltaic connector during transportation. Description of the drawings

[0026] Figure 1 Schematic perspective view of the positive electrode part of the photovoltaic connector provided by an embodiment of the present utility model;

[0027] Figure 2 Front view of the positive electrode part of the photovoltaic connector provided by an embodiment of the present utility model;

[0028] Figure 3 Schematic perspective view of the negative electrode part of the photovoltaic connector provided by an embodiment of the present utility model;

[0029] Figure 4 Front view of the negative electrode part of the photovoltaic connector provided by an embodiment of the present utility model;

[0030] Figure 5 Explosion diagram of the photovoltaic connector provided by an embodiment of the present utility model.

[0031] Reference numerals:

[0032] Positive electrode body 100; Positive electrode identifier 110; First accommodation channel 120; Positive electrode copper part 200; Square protrusion 210; Negative electrode body 300; Negative electrode identifier 310; Second accommodation channel 320; Negative electrode copper part 400; Ring protrusion 410; Drum spring 500; First seal 600; Anti-back-off connection assembly 700; Anti-back-off ring 710; Limit nut 720; Second seal 730. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be provided in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0039] Referring to Figures 1 to 5 , an embodiment of the present utility model provides a photovoltaic connector. The photovoltaic connector includes a positive electrode body 100, a positive electrode copper piece 200, a negative electrode body 300 and a negative electrode copper piece 400. The positive electrode body 100 is configured with a first accommodation channel 120 penetrating along the axis of the positive electrode body 100; the positive electrode copper piece 200 is disposed in the first accommodation channel 120; the negative electrode body 300 is configured with a second accommodation channel 320 penetrating along the axis of the negative electrode body 300; the negative electrode copper piece 400 is disposed in the second accommodation channel 320, and the positive electrode copper piece 200 and the negative electrode copper piece 400 are inserted and connected to achieve electrical connection; wherein, the positive electrode body 100 and the negative electrode body 300 are threadedly connected.

[0040] The present technical solution provides a photovoltaic connector. By providing a first accommodation channel 120 on the positive electrode body 100 to facilitate accommodating the positive electrode copper piece 200, and providing a second accommodation channel 320 on the negative electrode body 300 to facilitate accommodating the negative electrode copper piece 400. Among them, the positive electrode copper piece 200 and the negative electrode copper piece 400 can achieve electrical connection between the two through insertion. The ends of the positive electrode copper piece 200 and the negative electrode copper piece 400 away from each other are used to connect to the cable, and the cable is used to connect to the photovoltaic module or the external cable, so as to achieve electrical connection between the photovoltaic module and the external cable. In this application, by connecting the positive electrode body 100 and the negative electrode body 300 in a threaded connection form, compared with the snap connection form, the diameters of the positive electrode body 100 and the negative electrode body 300 can be reduced, thereby reducing the diameter of the entire photovoltaic connector, and further making the diameter of the photovoltaic connector smaller than the size of the frame of the photovoltaic module, so as to effectively reduce the risk of damage to the photovoltaic module and the photovoltaic connector during transportation.

[0041] Both the positive electrode body 100 and the negative electrode body 300 are made of insulating materials and are circular in structure. The positive electrode body 100 and the negative electrode body 300 are used to isolate the positive copper piece 200 and the negative copper piece 400 from the outside. The diameter of one end of the positive electrode body 100 is smaller than that of the other end, and an external thread is provided at the middle position of the positive electrode body 100. An internal thread is provided on the channel wall of the second accommodation channel 320 of the negative electrode body 300. The smaller-diameter end of the positive electrode body 100 can extend into the second accommodation channel 320 and be threadedly connected to the channel wall of the second accommodation channel 320 to achieve the fixed connection between the positive electrode body 100 and the negative electrode body 300.

[0042] As Figures 1 to 4 shown, a plurality of spaced reinforcing rib structures are provided on the outer peripheral surfaces of the positive electrode body 100 and the negative electrode body 300 to increase the structural strength of the positive electrode body 100 and the negative electrode body 300, so that the photovoltaic connector has a longer service life. In addition, in this embodiment, a positive electrode identifier 110 is provided on the positive electrode body 100, and a negative electrode identifier 310 is provided on the negative electrode body 300. In this way, it is convenient to identify the positive / negative poles when connecting the photovoltaic connector to a photovoltaic module or an external circuit, thereby guiding the operator to correctly connect the photovoltaic connector and improving the installation efficiency.

[0043] As Figure 5 shown, in this embodiment, a deformable connection groove is provided at the end of the positive copper piece 200 facing away from the negative copper piece 400. The connection head of the cable is inserted into the connection groove. After deforming the groove wall of the connection groove, the connection between the positive copper piece 200 and the cable can be achieved. Correspondingly, the connection method between the negative copper piece 400 and the cable is the same as that between the positive copper piece 200 and the cable.

[0044] As Figure 5 shown, in one of the embodiments, an insertion interface is provided at one end of the positive copper piece 200, and the end of the negative copper piece 400 opposite to the positive copper piece 200 is configured as a columnar structure, and the columnar structure is inserted into the insertion interface. By providing an insertion interface on the positive copper piece 200 and configuring the negative copper piece 400 as a columnar structure, the positive copper piece 200 and the negative copper piece 400 are connected in a male-female mating manner to achieve the electrical connection between the positive copper piece 200 and the negative copper piece 400.

[0045] Further, a plurality of limiting protrusions are provided at intervals along the circumferential direction of the positive copper member 200 in the insertion interface of the positive copper member 200. When one end of the negative copper member 400 is inserted into the insertion interface of the positive copper member 200, the negative copper member abuts against the limiting protrusions, thereby realizing the electrical connection between the two. Specifically, the limiting protrusions are formed by the partial position on the side wall of the positive copper member 200 being recessed into the insertion interface as a whole. In this way, it is beneficial to the forming of the limiting protrusions, which can simplify the processing technology of the positive copper member 200 and thus reduce the production cost.

[0046] As Figure 5 shown, in one embodiment, the photovoltaic connector further includes a drum spring 500. One end of the drum spring 500 is inserted into the insertion interface, and the columnar structure is inserted into the other end of the drum spring 500. By providing the drum spring 500 between the positive copper member 200 and the negative copper member 400, on the one hand, the reliability of the insertion of the positive copper member 200 and the negative copper member 400 can be improved, and on the other hand, the resistance after the insertion of the positive copper member 200 and the negative copper member 400 can be reduced through the drum spring 500.

[0047] Specifically, the drum spring 500 is also a copper component, and the diameter of one end of the drum spring 500 is smaller than that of the other end. The end of the drum spring 500 with a smaller diameter is inserted into the insertion interface of the positive copper member 200, and the end with a larger diameter forms mutual limitation with the end of the positive copper member 200 and is exposed at the end of the positive copper member 200. One end of the negative copper member 400 is inserted into the drum spring 500 and abuts against the limiting protrusions in the insertion interface after passing through the drum spring 500.

[0048] As Figure 5 shown, in one embodiment, the photovoltaic connector further includes a first seal 600 provided between the positive electrode body 100 and the negative electrode body 300. By providing the first seal 600 between the positive electrode body 100 and the negative electrode body 300, the sealing performance of the connection between the positive electrode body 100 and the negative electrode body 300 can be improved. Specifically, the first seal 600 is an annular sealing ring, and the annular sealing ring is made of rubber. The annular sealing ring is arranged between the butting ends of the positive electrode body 100 and the negative electrode body 300.

[0049] As Figure 5As shown, in one of the embodiments, the photovoltaic connector further includes a backstop connection assembly 700. One end of the positive electrode body 100 and the negative electrode body 300 that are away from each other is connected to a backstop connection assembly 700 respectively. The backstop connection assembly 700 is mutually limited with the positive electrode copper piece 200 or the negative electrode copper piece 400. By providing the backstop connection assembly 700 at one end of the positive electrode body 100 and the negative electrode body 300 that are away from each other, and through the mutual limitation between the backstop connection assembly 700 and the positive / negative electrode copper piece 400, the fixed connection between the positive / negative electrode copper piece 400 and the positive / negative electrode body 300 is realized, so as to ensure that the positive / negative electrode copper piece 400 will not be separated from the positive / negative electrode body 300 during use, thus ensuring the reliability of the photovoltaic connector in use.

[0050] Specifically, after connecting the positive electrode copper piece 200 and the negative electrode copper piece 400 to the cables respectively, the positive electrode copper piece 200 and the negative electrode copper piece 400 are respectively passed through the inner holes on the corresponding backstop connection assembly 700 until the positive electrode copper piece 200 is clamped with the corresponding backstop connection assembly 700 and the negative electrode copper piece 400 is clamped with the corresponding backstop connection assembly 700, then the mutual limitation between the backstop connection assembly 700 and the positive / negative electrode copper piece 400 can be realized.

[0051] As Figure 5 shown, specifically, the ends of the positive electrode copper piece 200 and the negative electrode copper piece 400 that are away from each other are provided with backstop protrusions. The backstop connection assembly 700 includes a backstop ring 710 and a limit nut 720. The backstop ring 710 is threadedly connected to the positive electrode body 100 or the negative electrode body 300. A backstop groove is provided on the inner hole wall of the backstop ring 710. The backstop protrusions on the positive electrode copper piece 200 or the negative electrode copper piece 400 are in concave-convex fit with the backstop groove to be mutually limited; the limit nut 720 is threadedly connected to one end of the backstop ring 710 that is away from the positive electrode body 100 or the negative electrode body 300.

[0052] In this embodiment, the anti-retreat ring 710 is arranged in a form with one end large, one end small, and an annular protrusion in the middle. An external thread is provided at the position where the small end of the anti-retreat ring 710 is connected to the annular protrusion. The small end of the anti-retreat ring 710 can extend into the positive electrode body 100 or the negative electrode body 300 and is threadedly connected to the positive electrode body 100 or the negative electrode body 300. An external thread is provided on the entire large end of the anti-retreat ring 710, and the limit nut 720 is threadedly connected to the large end of the anti-retreat ring 710. In this way, the fixed connection between the anti-retreat ring 710 and the positive / negative electrode body 300 is achieved. When the positive electrode copper piece 200 or the negative electrode copper piece 400 connected with the cable sequentially passes through the inner holes of the limit nut 720, the anti-retreat ring 710, and the positive / negative electrode body 300 and reaches the preset position, the anti-retreat protrusion on the positive electrode copper piece 200 or the anti-retreat protrusion on the negative electrode copper piece 400 can be engaged with the limit groove on the anti-retreat ring, thereby realizing mutual limitation between each other. In this way, it is convenient for the installation of the positive electrode copper piece 200 or the like, and at the same time, the positive electrode copper piece 200 or the negative electrode copper piece 400 can be limited, so as to prevent the positive electrode copper piece 200 or the negative electrode copper piece 400 from being separated from the positive electrode body 100 or the negative electrode body 300 after the cable is subjected to tension.

[0053] As Figure 5 shown, for the positive extreme end, a plurality of spaced square protrusions 210 are provided on the outer peripheral surface of the positive electrode copper piece 200, and the height of the square protrusions 210 gradually increases from the end facing the negative electrode copper piece 400 to the end away from the negative electrode copper piece 400; the shape of the anti-retreat groove on the anti-retreat ring 710 adapted to the positive electrode copper piece 200 is adapted to the square protrusions 210 on the positive electrode copper piece 200, and the position with the highest height in the square protrusions 210 abuts and limits with the deepest part of the groove depth in the anti-retreat groove.

[0054] By providing a plurality of spaced square protrusions 210 on the outer peripheral surface of the positive electrode copper piece 200 and setting the height of the square protrusions 210 to gradually increase from one end to the other end, so that during the process of connecting the positive electrode copper piece 200 with the anti-retreat connection assembly 700 and the positive electrode body 100, the inclined surface of the square protrusions 210 plays a guiding role in the installation. When the square protrusions 210 are snapped into the limit groove, under the mutual limitation of the end face of the square protrusions 210 and the groove side wall of the limit groove, even if the cable is pulled, the positive electrode copper piece 200 will not be separated from the anti-retreat ring 710.

[0055] As Figure 5As shown, for the negative extreme, an annular protrusion 410 is provided on the outer peripheral surface of the negative copper part 400. The height of the annular protrusion 410 gradually increases from the end facing the positive copper part 200 towards the end away from the positive copper part 200. The shape of the anti-backlash groove on the anti-backlash ring 710 adapted to the negative copper part 400 is adapted to the anti-backlash protrusion on the negative copper part 400. The position with the highest height in the anti-backlash protrusion abuts and limits the deepest position of the groove depth in the anti-backlash groove.

[0056] By providing an annular protrusion on the outer peripheral surface of the negative copper part 400 and setting the annular protrusion to gradually increase from one end to the other end, when connecting the negative copper part 400 with the connected cable to the anti-backlash connection assembly 700 and the negative electrode body 300, the annular protrusion with a slope can play a guiding role. When the annular protrusion is snapped into the annular anti-backlash groove, the end face of the annular protrusion and the groove side wall of the annular groove limit each other to prevent the negative copper part 400 from detaching from the anti-backlash ring 710 when the cable is pulled.

[0057] In one embodiment, the anti-backlash connection assembly 700 further includes a second seal 730. One end of the second seal 730 extends into the inner hole of the limit nut 720, and the other end of the second seal 730 extends into the inner hole of the anti-backlash ring 710. The annular protrusion in the middle of the second seal 730 is provided between the limit nut 720 and the anti-backlash ring 710. By providing the second seal 730 between the anti-backlash ring 710 and the limit nut 720, the sealing performance of the anti-backlash connection assembly 700 is improved. Specifically, the second seal 730 is a rubber part. The second seal 730 is configured as an annular structure, where one end of the second seal 730 has a larger diameter and one end has a smaller diameter, and an annular protrusion is provided at the middle position of the second seal 730. Among them, the end with the larger diameter is provided in the limit nut 720; the end with the smaller diameter is provided in the inner hole of the anti-backlash part. When the limit nut 720 is threadedly connected to the anti-backlash ring 710, the annular protrusion is pressed between the end face of the limit nut 720 and the end face of the annular protrusion of the anti-backlash ring 710.

[0058] The present utility model also provides a photovoltaic system, and the photovoltaic system includes the photovoltaic connector as above. By applying the photovoltaic connector as above in the photovoltaic system, since the diameter of the photovoltaic connector is reduced, during the transportation of the photovoltaic system, the risk of damage to the photovoltaic module and the photovoltaic connector caused by extrusion can be reduced.

[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0060] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A photovoltaic connector, characterized in that: The photovoltaic connector comprises: The positive electrode body is configured with a first accommodating channel extending along the axis of the positive electrode body; A positive copper piece, arranged in the first containing channel; The negative electrode body is configured with a second accommodating channel extending along the axis of the negative electrode body; A negative copper piece is disposed in the second accommodating channel, and the positive copper piece is plugged into the negative copper piece to achieve electrical connection; Wherein, the positive electrode body is threadedly connected to the negative electrode body.

2. The photovoltaic connector according to claim 1, characterized in that: One end of the positive copper piece is provided with an insertion port, and the end of the negative copper piece opposite to the positive copper piece is constructed as a columnar structure, and the columnar structure is inserted into the insertion port.

3. The photovoltaic connector according to claim 2, characterized in that: The photovoltaic connector also includes: A drum spring, one end of which is inserted into the plug interface, and the columnar structure is inserted into the other end of the drum spring.

4. The photovoltaic connector according to claim 1, characterized in that: The photovoltaic connector also includes: The first sealing member is arranged between the positive electrode body and the negative electrode body.

5. The photovoltaic connector according to claim 1, characterized in that: The photovoltaic connector also includes a retaining connection component, one end of the positive electrode body and the other end of the negative electrode body that are away from each other are each connected to the retaining connection component, and the retaining connection component and the positive electrode copper piece or the negative electrode copper piece are mutually limited.

6. The photovoltaic connector according to claim 5, characterized in that: The ends of the positive copper piece and the negative copper piece that are away from each other are provided with stop protrusions, and the stop connection assembly comprises: A stop ring, threadedly connected to the positive electrode body or the negative electrode body, a stop groove is provided on the inner hole wall of the stop ring, and the stop protrusion on the positive electrode copper piece or the negative electrode copper piece cooperates with the stop groove to limit each other; The limiting nut is threadedly connected to an end of the stop ring away from the positive electrode body or the negative electrode body.

7. The photovoltaic connector according to claim 6, characterized in that: The stop protrusions on the positive copper piece are arranged as a plurality of square protrusions spaced along the positive copper piece, and the heights of the square protrusions gradually increase from one end toward the negative copper piece toward one end away from the negative copper piece; the shape of the stop groove on the stop ring matched with the positive copper piece is matched with the square protrusions on the positive copper piece, and the highest position in the square protrusions and the deepest position in the stop groove are mutually abutted and limited.

8. The photovoltaic connector according to claim 6, characterized in that: The stop protrusion on the negative copper piece is set to be an annular protrusion, and the height of the annular protrusion gradually increases from one end toward the end away from the positive copper piece; the shape of the stop groove on the stop ring adapted to the negative copper piece is adapted to the stop protrusion on the negative copper piece, and the highest position in the stop protrusion and the deepest groove depth in the stop groove are mutually abutted and limited.

9. The photovoltaic connector according to claim 6, characterized in that: The anti-retraction connection assembly also includes: A second seal, one end of the second seal extends into the inner hole of the limit nut, the other end of the second seal extends into the inner hole of the stop ring, and an annular protrusion in the middle of the second seal is arranged between the limit nut and the stop ring.

10. A photovoltaic system, characterized in that: The photovoltaic system comprises the photovoltaic connector according to any one of claims 1 to 9.

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