Novel photovoltaic junction box capable of rapidly replacing diode

Abstract

The utility model discloses a novel photovoltaic junction box capable of rapidly replacing diodes, which belongs to the technical field of photovoltaic modules and comprises a junction box base and a junction box plug-in. The junction box base is connected with the junction box plug-in unit in a quick plug-in manner; the junction box base comprises a base box cover and a base box body, a welding bottom plate is arranged in a shell formed by the base box cover and the base box body, a pair of conductive contact pins is arranged below the welding bottom plate, and cable clamping grooves are formed in the two sides of the welding bottom plate; the junction box plug-in comprises a plug-in box cover and a plug-in box body, an axial diode is arranged in a shell formed by the plug-in box cover and the plug-in box body, and a conductive plug bush is arranged on the axial diode. The diode of the novel junction box is replaced into a quick plug type, so that the replacement is convenient and timely, and the labor cost and the time cost are greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic components, in particular to the field of photovoltaic component junction boxes. Background Art

[0002] At the application end of the photovoltaic system, the risk of failure of the junction box of photovoltaic modules due to overvoltage, overcurrent and overheating is relatively high, among which the failure of the bypass diode inside the junction box accounts for a relatively high proportion. At present, the conventional junction box diode is fixed inside the junction box body. During the installation and maintenance of the power station, the diode failure can only be solved by replacing the junction box as a whole. However, the junction box is bonded to the photovoltaic module through silicone, which is difficult to disassemble, and the photovoltaic backplane and the module lead wires are easily damaged during the disassembly process. After the junction box is replaced, the module lead wires need to be welded, silicone bonded and sealed. This cannot be done at the system installation site. The module must be removed from the mounting bracket before it can be carried out. It is difficult to solve the maintenance problem after the diode failure in a timely, effective and convenient manner.

[0003] The current internal structure and application status of conventional junction boxes are as follows: the diode is fixed inside the junction box, welded to the bus bar and bonded to the back of the component, and the box is filled with potting glue. The diode cannot be disassembled and replaced individually. The overall dismantling and replacement of the junction box is more costly, the operation is complicated and easily causes damage to the components. Utility Model Content

[0004] The purpose of the utility model is to quickly and conveniently replace the failed diode when the diode in the junction box is damaged at the photovoltaic application end, thereby reducing the loss of power generation; the new photovoltaic junction box of the utility model greatly improves the convenience of diode replacement by optimizing the traditional junction box structure.

[0005] The utility model is achieved in this way:

[0006] A novel photovoltaic junction box for quick replacement of diodes, characterized in that the junction box comprises: a junction box base and a junction box plug-in; the junction box base and the junction box plug-in are connected in a quick-plug manner; the junction box base comprises a junction box plug-in and a base box body, and the junction box plug-in and the base box body form a junction box base outer shell; a welding base plate is arranged inside the shell formed by the junction box plug-in and the base box body, a pair of conductive pins are arranged below the welding base plate, and cable slots are arranged on both sides of the welding base plate; the junction box plug-in comprises a plug-in box cover and a plug-in box body; the plug-in box cover and the plug-in box body form a junction box plug-in outer shell; an axial diode is arranged inside the shell formed by the plug-in box cover and the plug-in box body, and a conductive socket is arranged on the axial diode.

[0007] Furthermore, a retaining spring is provided inside the conductive socket. When the conductive socket is plugged into the conductive pin, the retaining spring is deformed and presses the pin tightly, so that the pin and the socket have good ohmic contact, and at the same time, a tight connection between the junction box base and the junction box plug is ensured.

[0008] Furthermore, the plug-in box cover and the plug-in box body form a junction box plug-in, and an O-ring is also provided on the outer shell of the junction box plug-in, and the O-ring is located at the bottom of the cylindrical socket of the plug-in box body.

[0009] Furthermore, the base box body is provided with 4 installation guide posts for positioning and fixing the welding base plate installation. The base box cover and the base box body are fixed by means of a card slot and a box body protrusion, and the buckle fixes the axial diode in the plug-in box body.

[0010] Furthermore, the conductive pins and the conductive sockets can be installed quickly and ensure good ohmic connection; the base box body and the plug-in box body adopt a fool-proof design to avoid incorrect polarity connection of the diode; if the axial diode of the photovoltaic module is damaged and the string cannot work normally, only the new junction box plug-in of the axial diode needs to be replaced, and the string can generate electricity normally.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model provides a diode quick-replacement plug-in junction box that can prevent hot spots and is easy to repair and maintain. When the diode needs to be replaced, it is only necessary to remove the junction box plug-in and replace it, which is convenient, fast and low in cost. There is no need to remove the old junction box, reducing the risk of component damage during the junction box replacement process;

[0013] 2. The new junction box diode is replaced with a quick-plug type, which is convenient and timely to replace, greatly saving labor costs and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a junction box base in a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0015] Figure 2 This is a schematic diagram of a junction box plug-in in a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of a junction box base in a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of a junction box plug-in in a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0018] Figure 5 This is a schematic diagram of the overall connection of a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0019] Figure 6 This is a half-section view of the whole of a novel photovoltaic junction box for quickly replacing diodes according to the utility model;

[0020] Figure 7 This is a schematic diagram of the overall unplugging of a new photovoltaic junction box for quick diode replacement according to the utility model;

[0021] Among them, 1-junction box base, 2-junction box plug-in, 1-1-base box cover, 1-2-1-conductive pin, 1-2-2-welding base plate, 1-2-3-cable slot, 1-3-base box body, 2-1-plug-in box cover, 2-2-1-axial diode, 2-2-2-conductive socket, 2-3-plug-in box body, 2-4-O-ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the following examples are given to further illustrate the utility model in detail. It should be noted that the specific implementation described here is only used to explain the utility model, and is not used to limit the utility model.

[0023] like Figures 1 to 6 As shown, the new junction box diode of the utility model is a quick-plug type, including a junction box base 1 and a junction box plug-in 2; the junction box base 1 and the junction box plug-in 2 are connected in a quick-plug type; the junction box base 1 includes a base box cover 1-1 and a base box body 1-3, and the base box cover 1-1 and the base box body 1-3 form an outer shell of the junction box base 1; a welding base plate 1-2-2 is arranged inside the shell formed by the base box cover 1-1 and the base box body 1-3, a pair of conductive pins 1-2-1 are arranged below the welding base plate 1-2-2, and cable slots 1-2-3 are arranged on both sides of the welding base plate 1-2-2; the junction box plug-in 2 includes a plug-in box cover 2-1 and a plug-in box body 2-3; the plug-in box cover 2-1 and the plug-in box body 2-3 form an outer shell of the junction box plug-in 2; an axial diode 2-2-1 is arranged inside the shell formed by the plug-in box cover 2-1 and the plug-in box body 2-3, and a conductive socket 2-2-2 is arranged on the axial diode 2-2-1. The conductive socket 2-2-2 is provided with a retaining spring inside. When plugged into the conductive pin 1-2-1, the retaining spring deforms to compress the pin, so that the pin and the socket have good ohmic contact, and at the same time ensure the tight connection between the junction box base 1 and the junction box plug-in 2.

[0024] The plug-in box cover 2-1 and the plug-in box body 2-3 form a junction box plug-in 2. An O-ring 2-4 is also provided on the outer shell of the plug-in box. The O-ring cooperates closely with the two to achieve good dustproof and waterproof effects.

[0025] The base box body 1-3 is provided with 4 installation guides for positioning and fixing the welding base plate 1-2-2. The base box cover and the base box body are fixed by a card slot and a box body protrusion, and the buckle fixes the axial diode 2-2-1 in the plug-in box body 2-3. The conductive pin and the conductive socket 2-2-2 are quickly installed and ensure good ohmic connection; the base box body 1-3 and the plug-in box body 2-1 adopt a fool-proof design to avoid the diode polarity being connected incorrectly; if the axial diode 2-2-1 of the photovoltaic module is damaged and the string cannot work normally, only the new junction box plug-in of the axial diode 2-2-1 needs to be replaced, and the string can generate electricity normally.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A novel photovoltaic junction box for quick diode replacement, characterized in that: The junction box comprises: A junction box base (1) and a junction box plug-in (2); the junction box base (1) and the junction box plug-in (2) are connected in a quick-plug manner; The junction box base (1) comprises a base box cover (1-1) and a base box body (1-3), wherein the base box cover (1-1) and the base box body (1-3) form an outer shell of the junction box base (1); a welding base plate (1-2-2) is arranged inside the shell formed by the base box cover (1-1) and the base box body (1-3), a pair of conductive pins (1-2-1) are arranged below the welding base plate (1-2-2), and cable slots (1-2-3) are arranged on both sides of the welding base plate (1-2-2); The junction box plug-in (2) comprises a plug-in box cover (2-1) and a plug-in box body (2-3); the plug-in box cover (2-1) and the plug-in box body (2-3) form an outer shell of the junction box plug-in (2); an axial diode (2-2-1) is arranged inside the shell formed by the plug-in box cover (2-1) and the plug-in box body (2-3), and a conductive socket (2-2-2) is arranged on the axial diode (2-2-1).

2. A novel photovoltaic junction box for quick diode replacement according to claim 1, characterized in that: The conductive socket (2-2-2) is provided with a retaining spring inside. When the conductive socket (2-2-2) is plugged into the conductive pin (1-2-1), the retaining spring deforms to compress the pin, so that the pin and the socket have good ohmic contact, while ensuring a tight connection between the junction box base (1) and the junction box plug (2).

3. A novel photovoltaic junction box for quick diode replacement according to claim 1, characterized in that: The plug-in box cover (2-1) and the plug-in box body (2-3) form a junction box plug-in (2); an O-ring (2-4) is also provided on the outer shell of the junction box plug-in (2); the O-ring (2-4) is located at the bottom of the cylindrical socket of the plug-in box body (2-3).

4. A novel photovoltaic junction box for quick diode replacement according to claim 1, characterized in that: The base box body (1-3) is provided with four installation guide posts for positioning and fixing the welding base plate (1-2-2) for installation; the base box cover and the base box body are fixed by means of a card slot and a box body protrusion; and the buckle fixes the axial diode (2-2-1) in the plug-in box body (2-3).

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