A cable storage type photovoltaic module junction box

Abstract

The present invention provides a cable storage type photovoltaic module junction box, comprising a shell, a switch component, a cable storage component and a photovoltaic module connecting electrode component. Since no cables are reserved after the cables are connected, the junction box of the present invention makes the appearance of the power station neat and beautiful; since no cables are reserved outside after the photovoltaic modules are connected, the safety hazard of conventional cables is avoided, and the service life of the cables can be greatly improved; since the cables are well stored, there is no problem of plugs colliding with the module back plate during the module production and transportation process, and the problem of hidden cracks caused by the collision of the module is avoided; the junction box of the present invention has a shutdown function, which is safer and more convenient during the module maintenance process; the junction box of the present invention is universal for both positive and negative electrodes of the module; the junction box of the present invention 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.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a cable storage type photovoltaic assembly junction box. Background Art

[0002] Photovoltaic modules are the core equipment of photovoltaic power generation. Their main components include glass, frame, battery cell, EVA / POP, backplane, and junction box. The junction box is the outlet device for the positive and negative lead wires of the photovoltaic module. It mainly consists of a shell 1, an electrode 2, a diode 3, a cable 4, and a male and female plug 5. Figure 1 As shown, its main function is to connect photovoltaic modules to form series or parallel connection. Since photovoltaic modules are large in size and junction boxes are generally installed in the middle or on both sides of the middleware, the connection between photovoltaic modules requires longer cables, which leads to a series of problems. For example, there is still excess cable after the modules are connected, which leads to the need to bundle the excess electricity at the photovoltaic power station site or bury it in the bracket groove, which on the one hand causes cable waste, on the other hand, excessive bending of the cable causes damage to the cable insulation, and the site is not neat and beautiful; for example, because the cable is too long, the swing of the cable during production, transportation, installation, and maintenance will cause the male and female plugs to touch the back of the module, and the solar cell is very thin and fragile. This collision will cause the cell to crack and affect the quality of the module. Summary of the invention

[0003] The present invention aims to provide a cable storage type photovoltaic assembly junction box to overcome the deficiencies in the prior art.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a cable storage type photovoltaic module junction box, including a shell, a switch component, a cable storage component and a photovoltaic module connecting electrode component.

[0005] As an improvement of a cable storage type photovoltaic module junction box of the present invention, 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 groove of the switch component; and the internal partition is provided with a socket port and a heat dissipation grille.

[0006] As an improvement of a cable storage type photovoltaic module junction box of the present invention, 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 is respectively connected to the short spacer knife and the long spacer knife; 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 respectively connected to the long spacer knife and the short spacer knife.

[0007] As an improvement of the cable storage type photovoltaic module junction box of the present invention, 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.

[0008] As an improvement of the cable storage type photovoltaic module junction box of the present invention, 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.

[0009] As an improvement of a cable storage type photovoltaic module junction box of the present invention, 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, and the socket electrode is composed of an outer shell, an electrode, and a spring electrode sheet, and a card slot five is opened on the outer shell, and the card slot five is used to connect with the main shell.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: since no cables are reserved after the cables are connected, the junction box of the present invention makes the appearance of the power station neat and beautiful; since no cables are 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 collision is avoided; the junction box of the present invention has a shutdown function, which is safer and more convenient during the module maintenance process; the junction box of the present invention is universal for both the positive and negative poles of the module; the junction box of the present invention 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

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of the background technology;

[0013] Figure 2 It is a schematic diagram of the connection structure between the junction box and the photovoltaic panel;

[0014] Figure 3 It is a cross-sectional view of the junction box in the switch separation state;

[0015] Figure 4 It is a cross-sectional view of the junction box in the switch-on state;

[0016] Figure 5 This is an exploded view of the junction box;

[0017] Figure 6 This is an exploded view of the shell;

[0018] Figure 7 is a structural schematic diagram of the main shell;

[0019] Figure 8 is a schematic diagram of the structure of the cover;

[0020] Fig. 9 is a schematic diagram of the structure of the internal partition;

[0021] Fig.10 The exploded view of the switch components;

[0022] Fig.11 It is a schematic diagram of the structure of a long spacer knife and a short spacer knife;

[0023] Fig.12 This is an exploded view of the cable storage component;

[0024] Fig.13 For the cable storage components Figure 1 ;

[0025] Fig.14 For the cable storage components Figure 2 ;

[0026] Fig.15 is a schematic diagram of the structure of the shell;

[0027] Fig.16 A schematic diagram of the structure of connecting electrode components to photovoltaic modules;

[0028] Fig.17 The front cross-sectional view (a) and left cross-sectional view (b) of the socket electrode.

[0029] Among them, 1, shell; 11, main shell; 111, card slot 1; 112, card slot 2; 113, card slot 3; 114, bus bar inlet; 115, reinforcing rib; 12, cover; 121, cable outlet; 122, cable socket; 123, connection port; 124, fixing slot; 13, internal partition; 131, socket port; 132, heat dissipation grille;

[0030] 2. Switch component; 21. Switch shaft; 22. Handle kit; 23. Long connecting rod; 24. Short connecting rod; 25. Copper busbar electrode; 26. Long spacer; 261. First electrode; 262. Long push-pull rod; 2621. First slotted hole; 27. Short spacer; 271. Second electrode; 272. Short push-pull rod; 2721. Second slotted hole; 28. Flexible connecting cable;

[0031] 3. Cable storage component; 31. Shell; 311. Shell; 3111. Card slot 4; 3112. Fixed shaft; 3113. Limiting slot 1; 3114. Limiting slot 2; 312. Cover plate; 32. Retractable cable drum; 321. Drum shell; 3211. Cable outlet 3211; 3212. Fixed port; 322. Cable; 3221. Plug; 323. Snail spring; 324. Spring cover plate; 325. Shaft; 326. Rotating electrode; 3261. Spring slot;

[0032] 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

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 2 to 4 As shown, a cable storage type photovoltaic module junction box includes a shell 1, a switch component 2, a cable storage component 3 and a photovoltaic module connecting electrode component 4.

[0035] like Figures 5 to 9As shown, 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 component 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 and a fixing groove 124 of the switch component 2; the internal partition 13 is provided with a socket port 131 and a heat dissipation grille 132.

[0036] 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; wherein 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.

[0037] 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 with 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 with the long connecting rod 23.

[0038] like Figures 10 to 15 As shown, 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 plate 312, and the shell 311 and the cover plate 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 plate 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 3221; the rotating electrode 326 is a hollow rotatable component, and both ends are provided with a sheet spring slot 3261; the drum shell 321 is provided with a cable outlet 3211 and a fixing port 3212 for the spiral spring 323; the shell 311 is provided with a card slot 4 3111 for installing the shaft 325, the main shell 110 for installing 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 of the switch component 2.

[0039] Fig.16 and 17As shown, 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 414 is opened on the outer shell 411, and the card slot 414 is used to connect with the main shell 311.

[0040] like Figures 2 to 17 As shown, 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.

[0041] like Figure 2 As shown, the working principle of the cable storage type photovoltaic module junction box is as follows: the positive and negative busbar entrances 114 of the photovoltaic module are used to access the photovoltaic module busbars, and the busbars are respectively connected to the electrodes 412 and the welding electrodes 43 on the socket electrodes 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 which 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 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, and the circuit is disconnected.

[0042] like Figure 3 As shown, when the assembly 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 body 12 in the junction box on the next photovoltaic assembly, and the switch shaft 21 in the switch component 2 is turned to the side of the cable outlet 121 on the cover body 12. At this time, the short connecting rod 24 and the long connecting rod 23 respectively drive the long spacer knife 26 and the short spacer knife 27 to move in 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 knife 26 and the second electrode 271 of the short spacer knife 27 are in contact with the leaf spring slots 3261 provided at both ends of the rotating electrode 326 in the cable storage component 3, and the circuit is connected.

[0043] 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 connecting 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.

[0044] 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.

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes 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 housing, a switch component, a cable storage component and a photovoltaic module connection electrode component; The shell includes a main shell, a cover, and an internal partition. The main shell includes a card slot 1 for fixing the photovoltaic module connection electrode component, a card slot 2 for fixing the switch component copper bar, a card slot 3 for fixing the cable storage component, and a positive and negative bus bar inlet and a reinforcing rib of the photovoltaic module; the cover is provided with a cable outlet, a cable socket, a connection port and a fixing slot of the switch component; and the internal partition is provided with a socket port and a heat dissipation grille; The switch component includes a switch shaft, a handle set, a long connecting rod, a short connecting rod, a copper bar 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 is connected to the short spacer knife and the long spacer knife respectively; the handle set is sleeved with the switch shaft; one end of the flexible connecting cable is connected to the copper bar electrode, and the other end is connected to the long spacer knife and the short spacer knife respectively; The long spacer blade is composed of a first electrode and a long push-pull rod, one end of which is provided with a first slot-shaped hole for connecting with the short connecting rod; the short spacer blade is composed of a second electrode and a short push-pull rod, one end of which is provided with a second slot-shaped hole for connecting with the long connecting rod; 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.

2. A cable storage type photovoltaic module 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 is composed 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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