Novel axial diode photovoltaic three-split junction box

Abstract

The utility model relates to the field of junction boxes, in particular to a novel axial diode photovoltaic three-split junction box, which comprises a box body, copper plates, axial diodes, Z-shaped radiating fins and cables, the copper plates are positioned inside the box body, the copper plates are symmetrically arranged inside the box body, bending extension parts are symmetrically arranged at two ends of each axial diode, and the Z-shaped radiating fins are arranged at two ends of each axial diode. The bending extension parts are connected with the adjacent copper plates, the Z-shaped cooling fin is connected to the lower portion of the right copper plate, the bending extension part on the right side penetrates through the Z-shaped cooling fin, the cable is connected with the right copper plate, and the length of a welding point is increased through the bending extension parts, the power-on performance is improved, and the internal resistance is reduced; the current conduction effect of the axial diode can be improved by 10%, the heat dissipation capacity can be effectively improved, meanwhile, the Z-shaped cooling fins with the copper plates on the upper portions and the aluminum plates on the lower portions are adopted, the overcurrent capacity is improved, the heat dissipation effect is further improved, and specification use can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of junction boxes, in particular to a novel axial diode photovoltaic three-part junction box. Background Art

[0002] The photovoltaic junction box is a connection device between the solar cell array composed of solar cell modules and the solar charging control device. Its main function is to connect and protect solar photovoltaic modules, connect the power generated by solar cells to external lines, and conduct the current generated by photovoltaic modules.

[0003] At present, the mainstream of photovoltaic junction box products is module diode. Because the module diode is encapsulated in epoxy resin, the heat is not easy to dissipate during the junction temperature and thermal runaway test, which easily generates high temperature and causes the diode to fail. During normal use, the module diode may be able to work normally. However, in some special cases, such as shade from trees or foreign objects, the module diode may generate too high a temperature, causing the module diode to burn out.

[0004] Therefore, in order to solve the deficiencies in the prior art, it is necessary to design a new axial diode photovoltaic three-part junction box with a simple structure. Utility Model Content

[0005] The utility model provides a novel axial diode photovoltaic three-part junction box to solve the problems of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: A new type of axial diode photovoltaic three-part junction box includes: a box body, a copper plate located inside the box body, an axial diode, a Z-shaped heat sink and a cable, the copper plate is symmetrically arranged inside the box body, and the two ends of the axial diode are symmetrically provided with bending extensions, the bending extensions connect the adjacent copper plates respectively, the Z-shaped heat sink is connected to the bottom of the right copper plate, the bending extension on the right side passes through the Z-shaped heat sink, and the cable is connected to the copper plate on the right.

[0007] As a further improvement, a flat square portion is provided in the middle of the bent extension portion, and the flat square portion is connected to the copper plate by welding.

[0008] As a further improvement, a positioning column is provided inside the box body, and the copper plate is clamped and positioned on the positioning column.

[0009] As a further improvement, the bent extension portions are connected to adjacent copper plates by resistance welding.

[0010] As a further improvement, the copper plate is made of red copper and has a thickness of 0.6 mm.

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

[0012] The bending extension increases the length of the welding point, improves the power-carrying performance, and reduces the internal resistance. The bending extension of the axial diode is located in the middle part, which is directly connected to the photovoltaic busbar. The current carrying effect of the axial diode can be improved by 10%, and the heat dissipation capacity can also be effectively improved. The bending extension is placed under the copper plate, with a larger design area to prevent heat accumulation and help heat dissipation. At the same time, a Z-shaped heat sink with a copper plate on the top and an aluminum plate on the bottom can improve the current carrying capacity, further improve the heat dissipation effect, and can reduce the specifications for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model

[0015] In the figure, 1-box body, 11-positioning column, 2-copper plate, 3-axial diode, 31-bending part, 32-flat square part, 4-Z-shaped heat sink, 5-cable. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Below is a combination of the embodiments and the attached Figures 1-2 , the technical solution of the utility model is further elaborated.

[0019] Example 1

[0020] A novel axial diode photovoltaic three-part junction box comprises: a box body 1, a copper plate 2 located inside the box body 1, an axial diode 3, a Z-shaped heat sink 4 and a cable 5, wherein the copper plate 2 is symmetrically arranged inside the box body 1, and bending extensions 31 are symmetrically provided at both ends of the axial diode 3, and the bending extensions 31 connect the adjacent copper plates 2 respectively, the Z-shaped heat sink 4 is connected to the bottom of the right copper plate 2, the right bending extension 31 passes through the Z-shaped heat sink 4, and the cable 5 is connected to the copper plate 2 on the right.

[0021] like Figure 1-2 As shown, the use principle of the utility model is: the length of the welding point is increased by the bending extension part 31, the power-carrying performance is improved, and the internal resistance is reduced; the bending extension part 31 of the axial diode 3 is located in the middle part, which is directly connected to the photovoltaic bus bar. The current carrying effect of the axial diode 3 can be improved by 10%, and the heat dissipation capacity can also be effectively improved. Moreover, the bending extension part 31 is placed under the copper plate 2, and the design area is larger to prevent heat accumulation and is more conducive to heat dissipation. At the same time, the copper plate 2 is used on the upper side and the Z-shaped heat sink 4 of the aluminum plate on the lower side to improve the current carrying capacity, further improve the heat dissipation effect, and can reduce the specifications for use.

[0022] As a further preferred embodiment, a flat square portion 32 is provided in the middle of the bent extension portion 31, and the flat square portion 32 is connected to the copper plate 2 by welding. The flat square portion 32 can make the area of ​​the copper plate 2 welded larger, making the welding more firm and stable.

[0023] As a further preferred embodiment, a positioning column 11 is provided inside the box body 1, and the copper plate 2 is snap-fitted and positioned on the positioning column 11, and is fixed by four positioning columns 11, so the installation is simple.

[0024] As a further preferred embodiment, the bent extension portion 31 is connected to the adjacent copper plates 2 by resistance welding, and the resistance welding can ensure that the welding tension is greater than 200N, thereby ensuring the overall structural strength.

[0025] As a further preferred embodiment, the copper plate 2 is made of red copper, and the thickness of the copper plate 2 is 0.6 mm. While ensuring the power-carrying capacity and heat dissipation, the cost can also be reduced, thereby improving the competitiveness of the product.

[0026] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A novel axial diode photovoltaic three-part junction box, characterized in that: include: A box body, a copper plate located inside the box body, an axial diode, a Z-shaped heat sink and a cable, wherein the copper plate is symmetrically arranged inside the box body, and bending extensions are symmetrically arranged at both ends of the axial diode, and the bending extensions are connected to the adjacent copper plates respectively, and the Z-shaped heat sink is connected to the bottom of the right copper plate, and the bending extension on the right side passes through the Z-shaped heat sink, and the cable is connected to the copper plate on the right.

2. A novel axial diode photovoltaic three-part junction box according to claim 1, characterized in that: A flat square portion is provided in the middle of the bent extension portion, and the flat square portion is connected to the copper plate by welding.

3. According to claim 1, a novel axial diode photovoltaic three-part junction box is characterized in that: A positioning column is arranged inside the box body, and the copper plate is clamped and positioned on the positioning column.

4. According to the novel axial diode photovoltaic three-part junction box of claim 1, it is characterized in that: The bent extension parts are connected to adjacent copper plates by resistance welding.

5. The novel axial diode photovoltaic three-part junction box according to claim 1 is characterized in that: The copper plate is made of red copper, and the thickness of the copper plate is 0.6 mm.

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