Cable-storage-type photovoltaic module junction box

Abstract

Provided in the present application are a cable-storage-type photovoltaic module junction box, which comprises a housing, a switch component, a cable storage component and a photovoltaic module connecting electrode component. In the junction box in the present application, there is no reserved cable after the cable is connected, such that a power station is neat and aesthetic in appearance; the cable is not reserved outside after a photovoltaic module is connected, such that a potential safety hazard present in conventional cables is avoided, and the service life of the cable can also be greatly prolonged; the cable is properly stored, and thus the problem of a plug colliding with a backplate of the module during module production and transportation processes is avoided, such that the problem of a hidden crack caused by the module being impacted is avoided; the junction box in the present application has a turn-off function, and is thus safer and more convenient during module maintenance; the junction box in the present application is universal at positive and negative electrodes of the module; and the junction box in the present application has a cable storage function, the cable is arranged in a cable drum, and the cable can be pulled out on the basis of an actual connection length.

Description

A cable storage type photovoltaic module junction box

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on August 30, 2023, with application number 202311101470.2 and invention name “A cable storage type photovoltaic module junction box”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of photovoltaic power generation technology, and in particular to a cable storage type photovoltaic assembly junction box. Background Art

[0004] Photovoltaic modules are the core equipment for photovoltaic power generation. Their main components include glass, frame, solar cells, EVA / POP, backsheet, and junction box. The junction box, the outlet for the positive and negative leads of the PV module, consists primarily of a housing 1, electrodes 2, diodes 3, cables 4, and male and female connectors 5, as shown in Figure 1. Its primary function is to connect PV modules, either in series or parallel. Due to the large size of PV modules and the fact that junction boxes are typically installed in the middle or on either side of the module, connecting PV modules requires long cables. This leads to a number of problems. For example, after connecting modules, excess cable remains, requiring the excess cable to be bundled or buried in bracket grooves at the PV power station site. This not only wastes cable, but also damages the insulation of the cable due to excessive bending, resulting in an untidy and unsightly site. Furthermore, due to the long cables, the male and female connectors can rub against the back of the modules during production, transportation, installation, and maintenance. Since solar cells are very thin and fragile, such collisions can cause hidden cracks in the cells, affecting module quality.

[0005] Summary of the Invention

[0006] The present application aims to provide a cable storage type photovoltaic module junction box to overcome the deficiencies in the prior art.

[0007] In order to solve the above technical problems, the technical solution of the present application is: a cable storage type photovoltaic module junction box, including a shell, a switch component, a cable storage component and a photovoltaic module connection electrode component.

[0008] As an optional embodiment of a cable storage type photovoltaic module junction box of the present application, the shell includes a main shell, a cover body, and an internal partition. The main shell includes a slot 1 for fixing the photovoltaic module connection electrode component, a slot 2 for fixing the switch component copper bus, a slot 3 for fixing the cable storage component, and an entrance and reinforcement ribs for the positive and negative bus bars of the photovoltaic module; the cover body is provided with a cable outlet, a cable socket, a connection port and a fixing slot of the switch component; the internal partition is provided with a socket port and a heat dissipation grille.

[0009] As an optional embodiment of a cable-storage photovoltaic module junction box of the present application, the switch component includes a switch shaft, a handle kit, a long connecting rod, a short connecting rod, a copper busbar electrode, a long spacer knife, a short spacer knife, and a flexible connecting cable; wherein one end of the long connecting rod and the short connecting rod are connected to the switch shaft, and the other end are connected to the short spacer knife and the long spacer knife respectively; the handle kit is sleeved on the switch shaft; one end of the flexible connecting cable is connected to the copper busbar electrode, and the other end is connected to the long spacer knife and the short spacer knife respectively.

[0010] As an optional implementation scheme of a cable-storage photovoltaic module junction box in the present application, the long spacer is composed of a first electrode and a long push-pull rod, and a first slot-shaped hole is opened at one end of the long push-pull rod for connecting with the short connecting rod; the short spacer is composed of a second electrode and a short push-pull rod, and a second slot-shaped hole is opened at one end of the short push-pull rod for connecting with the long connecting rod.

[0011] As an optional embodiment of a cable storage type photovoltaic module junction box of the present application, the cable storage component includes an outer shell and a retractable cable drum, the outer shell includes a shell and a cover plate, and the shell and the cover plate are both made of insulating materials; the retractable cable drum includes a drum shell, a cable, a snail spring, a spring cover plate, an axis, and a rotating electrode, one end of the cable is connected to the rotating electrode, and the other end is provided with a plug; the rotating electrode is a hollow rotatable component with leaf spring slots at both ends; the drum shell is provided with a cable outlet and a fixing port for the snail spring; the shell is provided with a card slot four for installing the shaft, a fixed shaft for installing the switch component, and a limit slot one and a limit slot two for limiting the stroke of the long push-pull rod and the short push-pull rod of the switch component.

[0012] As an optional embodiment of a cable-storage photovoltaic module junction box of the present application, the photovoltaic module connection electrode component includes a socket electrode, a diode, and a welding electrode, wherein one end of the diode is connected to the socket electrode and the other end is connected to the welding electrode. The socket electrode is composed of an outer shell, an electrode, and a spring electrode sheet. A card slot five is opened on the outer shell, and the card slot five is used to connect to the main shell.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: the junction box of the present application does not reserve cables after the cables are connected, making the appearance of the power station neat and beautiful; since the cables are not reserved outside after the photovoltaic modules are connected, the safety hazards of conventional cables are avoided, and the service life of the cables can be greatly improved; since the cables are well stored, there is no problem of the plug colliding with the module backplane during the module production and transportation process, and the problem of hidden cracks caused by the module being collided is avoided; the junction box of the present application has a shutdown function, which is safer and more convenient during the module maintenance process; the junction box of the present application is universal for both the positive and negative poles of the module; the junction box of the present application has a cable storage function, and the cable is in the cable drum, and the cable can be pulled out according to the actual connection length. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] FIG1 is a schematic structural diagram of background technology;

[0016] Figure 2 is a schematic diagram of the connection structure between the junction box and the photovoltaic panel;

[0017] Figure 3 is a cross-sectional view of the junction box in a switch-disconnected state;

[0018] FIG4 is a cross-sectional view of the junction box in a switch-on state;

[0019] FIG5 is an exploded view of the junction box;

[0020] FIG6 is an exploded view of the housing;

[0021] Figure 7 is a schematic structural diagram of the main housing;

[0022] Figure 8 is a schematic structural diagram of the cover;

[0023] Figure 9 is a schematic structural diagram of the internal partition;

[0024] FIG10 is an exploded view of the switch component;

[0025] Figure 11 is a schematic diagram of the structure of a long spacer knife and a short spacer knife;

[0026] FIG12 is an exploded view of the cable storage component;

[0027] FIG13 is a first diagram of the cable storage component;

[0028] FIG14 is a second diagram of the cable storage component;

[0029] Figure 15 is a schematic structural diagram of the shell;

[0030] FIG16 is a schematic diagram of the structure of the photovoltaic module connecting electrode components;

[0031] FIG17 is a front cross-sectional view (a) and a left cross-sectional view (b) of a socket electrode.

[0032] Among them, 1. Housing; 11. Main housing; 111. Card slot 1; 112. Card slot 2; 113. Card slot 3; 114. Bus bar inlet; 115. Reinforcement rib; 12. Cover; 121. Cable outlet; 122. Cable socket; 123. Connector port; 124. Fixing slot; 13. Internal partition; 131. Socket port; 132. Radiator grille;

[0033] 2. Switch component; 21. Switch shaft; 22. Handle assembly; 23. Long connecting rod; 24. Short connecting rod; 25. Copper busbar electrode; 26. Long spacer blade; 261. First electrode; 262. Long push-pull rod; 2621. First slotted hole; 27. Short spacer blade; 271. Second electrode; 272. Short push-pull rod; 2721. Second slotted hole; 28. Flexible connecting cable;

[0034] 3. Cable storage component; 31. Housing; 311. Shell; 3111. Card slot 4; 3112. Fixed shaft; 3113. Limit slot 1; 3114. Limit slot 2; 312. Cover; 32. Retractable cable drum; 321. Drum housing; 3211. Cable outlet; 3212. Fixing port; 322. Cable; 3221. Plug; 323. Snail spring; 324. Spring cover; 325. Shaft; 326. Rotating electrode; 3261. Spring slot;

[0035] 4. Photovoltaic module connection electrode components; 41. Socket electrode; 411. Outer shell; 412. Electrode; 413. Spring electrode sheet; 414. Card slot five; 42. Diode; 43. Welding electrode. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] As shown in FIG. 2 to FIG. 4 , a cable storage type photovoltaic module junction box includes a housing 1 , a switch component 2 , a cable storage component 3 and a photovoltaic module connection electrode component 4 .

[0038] As shown in Figures 5 to 9, the shell 1 includes a main shell 11, a cover body 12, and an internal partition 13. The main shell 11 includes a slot 111 for fixing the main shell 11, a slot 2 112 for fixing the copper busbar of the switch component 2, a slot 3 113 for fixing the cable storage component 3, a photovoltaic module positive and negative bus bar inlet 114 and a reinforcing rib 115; the cover body 12 is provided with a cable outlet 121, a cable socket 122, a connection port 123 of the switch component 2 and a fixing slot 124; the internal partition 13 is provided with a socket port 131 and a heat dissipation grille 132.

[0039] The switch component 2 includes a switch shaft 21, a handle kit 22, a long connecting rod 23, a short connecting rod 24, a copper busbar electrode 25, a long spacer knife 26, a short spacer knife 27, and a flexible connecting cable 28; one end of the long connecting rod 23 and the short connecting rod 24 are connected to the switch shaft 21, and the other ends are connected to the short spacer knife 27 and the long spacer knife 26 respectively; the handle kit 22 is sleeved on the switch shaft 21; one end of the flexible connecting cable 28 is connected to the copper busbar electrode 25, and the other end is connected to the long spacer knife 26 and the short spacer knife 27 respectively.

[0040] The long spacer 26 is composed of a first electrode 261 and a long push-pull rod 262. A first slotted hole 2621 is opened at one end of the long push-pull rod 262 for connecting to the short connecting rod 24. The short spacer 27 is composed of a second electrode 271 and a short push-pull rod 272. A second slotted hole 2721 is opened at one end of the short push-pull rod 272 for connecting to the long connecting rod 23.

[0041] As shown in Figures 10 to 15, the cable storage component 3 includes a shell 31 and a retractable cable drum 32. The shell 31 includes a shell 311 and a cover 312. The shell 311 and the cover 312 are both made of insulating materials; the retractable cable drum 32 includes a drum shell 321, a cable 322, a spiral spring 323, a spring cover 324, a shaft 325, and a rotating electrode 326. One end of the cable 322 is connected to the main shell 113, and the other end is provided with a plug 3 221; the rotating electrode 326 is a hollow rotatable member with leaf spring slots 3261 at both ends; the wire drum shell 321 is provided with a cable outlet 3211 and a fixing port 3212 for the spiral spring 323; the housing 311 is provided with a fourth slot 3111 for mounting the shaft 325, the main housing 110 for mounting the switch component 2, and a limit slot 1 3113 and a limit slot 2 3114 for limiting the travel of the long push-pull rod 262 and the short push-pull rod 272 in the switch component 2.

[0042] As shown in Figures 16 and 17, the photovoltaic module connecting electrode component 4 includes a socket electrode 41, a diode 42, and a welding electrode 43, wherein one end of the diode 42 is connected to the socket electrode 41, and the other end is connected to the welding electrode 43. The socket electrode 41 is composed of an outer shell 411, an electrode 412, and a spring electrode sheet 413. A card slot five 414 is opened on the outer shell 411, and the card slot five 414 is used to connect to the main shell 311.

[0043] As shown in Figures 2 to 17, the switch component 2, the cable storage component 3 and the photovoltaic module connecting electrode component 4 are all installed in the shell 1; the switch shaft 21 of the switch component 2 is connected to the main shell 11 on the shell 311 of the cable storage component 3; the long push-pull rod 262 and the short push-pull rod 272 of the switch component 2 are respectively installed in the limit groove 1 3113 and the limit groove 2 3114 on the shell 311 of the cable storage component 3; the photovoltaic module connecting electrode component 4 is installed in the card slot 111 in the main shell 11; the bottom of the socket electrode 41 is connected to the main shell 311, the top is connected to the cable socket 122 on the cover body 12, and the welding electrode 43 is connected to the copper busbar electrode 25 in the switch component 2.

[0044] As shown in Figure 2, the working principle of the cable storage type photovoltaic module junction box is as follows: the photovoltaic module positive and negative bus bar inlets 114 are used to connect to the photovoltaic module bus bars, which are respectively connected to the electrodes 412 and welding electrodes 43 on the socket electrode 41. During the production and transportation of the module, the plug 3221 on the cable 322 is installed in the fixing groove 124 on the cover body 12; the switch shaft 21 in the switch component 2 turns to the side of the cable socket 122 on the cover body 12. At this time, the short connecting rod 24 and the long connecting rod 23 respectively drive the long spacer 26 and the short spacer 27 to move within the limiting groove 1 3113 and the limiting groove 2 3114 on the shell 311, so that the first electrode 261 of the long spacer 26 and the second electrode 271 of the short spacer 27 are separated from the leaf spring slots 3261 provided at both ends of the rotating electrode 326 in the cable storage component 3, thereby disconnecting the circuit.

[0045] As shown in Figure 3, when the component is installed on-site at the photovoltaic power station, the cable 322 is pulled out and connected to the cable socket 122 on the cover 12 in the junction box on the next photovoltaic component, and the switch shaft 21 in the switch component 2 is turned to the side of the cable outlet 121 on the cover 12. At this time, the short connecting rod 24 and the long connecting rod 23 respectively drive the long spacer 26 and the short spacer 27 to move in the limit groove 1 3113 and the limit groove 2 3114 on the shell 311, so that the first electrode 261 of the long spacer 26 and the second electrode 271 of the short spacer 27 contact the leaf spring slots 3261 provided at both ends of the rotating electrode 326 in the cable storage component 3, thereby connecting the circuit.

[0046] During the component production process, the junction box is glued to the busbar outlet of the photovoltaic component with silicone, and the component busbar is connected to the welding electrode 43 in the photovoltaic component connection electrode component 4 and the electrode 412 in the socket electrode 41 through the photovoltaic component positive and negative busbar inlets 114 in the shell 1; and the switch shaft 21 in the switch component 2 is turned to the side of the cable socket 122 on the cover body 12 to disconnect the circuit, and the plug 3221 on the cable 322 is installed in the fixing groove 124 on the cover body 12.

[0047] When the photovoltaic modules are transported to the photovoltaic power station for installation, the cable 322 is pulled out and connected to the cable socket 122 on the cover 12 in the junction box on the next photovoltaic module, and the switch shaft 21 in the switch component 2 is turned to the side of the cable outlet 121 on the cover 12 to connect the circuit.

[0048] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cable storage type photovoltaic module junction box, characterized in that: It includes a shell, a switch component, a cable storage component and a photovoltaic component connecting electrode component.

2. The cable storage type photovoltaic module junction box according to claim 1, characterized in that: The shell includes a main shell, a cover body, and an internal partition. The main shell includes a slot 1 for fixing the photovoltaic component connection electrode component, a slot 2 for fixing the switch component copper busbar, a slot 3 for fixing the cable storage component, and an entrance and reinforcement ribs for the positive and negative bus bars of the photovoltaic component; the cover body is provided with a cable outlet, a cable socket, a connection port and a fixing groove of the switch component; and the internal partition is provided with a socket port and a heat dissipation grille.

3. The cable storage type photovoltaic module junction box according to claim 1, characterized in that: The switch component includes a switch shaft, a handle kit, a long connecting rod, a short connecting rod, a copper busbar electrode, a long spacer knife, a short spacer knife, and a flexible connecting cable; wherein one end of the long connecting rod and the short connecting rod are connected to the switch shaft, and the other ends are connected to the short spacer knife and the long spacer knife respectively; the handle kit is sleeved on the switch shaft; one end of the flexible connecting cable is connected to the copper busbar electrode, and the other end is connected to the long spacer knife and the short spacer knife respectively.

4. The cable storage type photovoltaic assembly junction box according to claim 1, characterized in that: The long spacer knife is composed of a first electrode and a long push-pull rod, one end of which is provided with a first slotted hole for connecting with the short connecting rod; the short spacer knife is composed of a second electrode and a short push-pull rod, one end of which is provided with a second slotted hole for connecting with the long connecting rod.

5. The cable storage type photovoltaic assembly junction box according to claim 1, characterized in that: The cable storage component includes an outer shell and a retractable cable drum, the outer shell includes a shell and a cover plate, and the shell and the cover plate are both made of insulating materials; the retractable cable drum includes a drum shell, a cable, a snail spring, a spring cover plate, an axis, and a rotating electrode, one end of the cable is connected to the rotating electrode, and the other end is provided with a plug; the rotating electrode is a hollow rotatable component, and both ends are provided with sheet spring slots; the drum shell is provided with a cable outlet and a fixing port for the snail spring; the shell is provided with a card slot four for installing the shaft, a fixed shaft for installing the switch component, and a limit slot one and a limit slot two for limiting the travel of the long push-pull rod and the short push-pull rod in the switch component.

6. The cable storage type photovoltaic assembly junction box according to claim 1, characterized in that: The photovoltaic module connecting electrode component includes a socket electrode, a diode, and a welding electrode, wherein one end of the diode is connected to the socket electrode, and the other end is connected to the welding electrode. The socket electrode consists of an outer shell, an electrode, and a spring electrode sheet. A slot five is opened on the outer shell, and the slot five is used to connect to the main shell.

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