Novel photovoltaic junction box

Abstract

A novel photovoltaic junction box relates to the technical field of photovoltaic modules. Comprising a shell, a bottom plate and heat-conducting pieces, the heat conduction piece is arranged in the buckling position groove, and the heat conduction piece is fixed between the shell and the bottom plate through injection molding of the bottom plate. According to the utility model, an air-exposed surface is made of raw materials in one shell, and an internal structural member is an integrated shell part formed by recycled material production. And meanwhile, a heat-conducting insert material is added between the inner and outer structures, so that the heat dissipation performance of the wire box can be effectively improved, and the reliability of the wire box is greatly improved. According to the utility model, the problem that the weatherability of the returned material used by the wire box is reduced can be thoroughly solved, the returned material usage amount of the wire box is greatly improved through a special structural form, the material cost of the wire box is further reduced, and the reliability of the wire box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a novel photovoltaic junction box. Background Art

[0002] With the rapid development of the photovoltaic industry in recent years, the competition in the photovoltaic market has become increasingly fierce. At present, the specifications of silicon wafers for photovoltaic modules have changed from 156mm to 182mm and then to 210mm. The increase in the specifications of photovoltaic silicon wafers has greatly improved the power generation of single-chip modules. As a result, the current of photovoltaic module systems is getting higher and higher. At present, the short-circuit current of photovoltaic modules has reached 18.6A or higher, which puts higher requirements on the performance of photovoltaic junction boxes. At present, photovoltaic junction boxes are all made of plastic injection molding, with poor heat dissipation performance, which cannot meet the requirements of high-power photovoltaic modules. Utility Model Content

[0003] In view of the above problems, the utility model provides a novel photovoltaic junction box and a preparation method thereof which can reduce the preparation cost while prolonging the service life and improving the heat dissipation performance.

[0004] The technical solution of the utility model is:

[0005] New photovoltaic junction box, including:

[0006] The outer shell has a hollow portion extending vertically through the middle thereof; the inner side wall of the outer shell is provided with a plurality of buckle slots; the outer shell is a raw material outer shell;

[0007] A bottom plate, fixedly arranged at the bottom of the shell; the bottom plate is a raw material bottom plate or a recycled material bottom plate;

[0008] The heat conducting member is arranged in the buckle groove and is fixed between the shell and the bottom plate through injection molding of the bottom plate.

[0009] Specifically, the cross section of the heat conducting component is an I-shaped structure, and a back platform adapted to the buckle slot is provided on the back.

[0010] Specifically, the bottom of the heat conducting member is provided with a supporting leg extending into the bottom plate.

[0011] Specifically, the cross-section of the supporting leg is rectangular or W-shaped.

[0012] Specifically, the bottom plate is provided with upwardly extending blocking arms around it;

[0013] The heat conducting member is located between the barrier arm and the housing.

[0014] Specifically, the cross section of the back stage is a rectangular or trapezoidal structure.

[0015] Specifically, the bottom of the housing is provided with a positioning groove having a trapezoidal cross-section;

[0016] The bottom plate is provided with a positioning platform matched with the positioning groove.

[0017] Specifically, a plurality of through holes are provided on the heat conducting member in an area between the outer shell and the bottom plate.

[0018] Specifically, after the shell and the bottom plate are fixedly formed, they are fixed on the photovoltaic module glass by means of a sealant.

[0019] A method for preparing a novel photovoltaic junction box comprises the following steps:

[0020] Step 1: In the first cavity of mold A, injection molding is performed through the gate of material tube a to form a shell with buckle grooves. After injection molding is completed, the mold is opened;

[0021] Step 2: Add heat conducting parts to the buckle slot;

[0022] Step 3: Rotate the bottom mold, dock the bottom mold with the B mold, and inject through the B material pipe gate to form a bottom plate connected to the shell;

[0023] Step 4: After the injection molding is completed, the outer shell and the base plate form a whole, and the internal heat-conducting parts are wrapped without leakage.

[0024] The utility model realizes an integrated shell component in which the exposed air surface is made of raw materials and the internal structural parts are produced with recycled materials. At the same time, adding heat-conducting insert materials between the internal and external structures can effectively improve the heat dissipation performance of the wire box and greatly increase the reliability of the wire box. This utility model patent can completely solve the problem of reduced weather resistance of the wire box using recycled materials, and at the same time, through a special structural form, greatly increase the amount of recycled materials used in the wire box, further reduce the material cost of the wire box, and improve the reliability of the wire box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the split structure of the shell and the bottom plate;

[0026] Figure 2 is a structural schematic diagram of embodiment 1;

[0027] Figure 3 is a structural schematic diagram of Embodiment 2;

[0028] Figure 4 is a structural schematic diagram of embodiment 3;

[0029] Figure 5 is a structural schematic diagram of Embodiment 4;

[0030] Figure 6 It is a schematic diagram of the assembly structure;

[0031] Figure 7 It is a schematic diagram of the cross-sectional structure of the shell;

[0032] Figure 8 It is a schematic diagram of the injection molding process structure;

[0033] In the figure, 100 is the outer shell, 110 is the hollow part, and 120 is the buckle slot.

[0034] 200 is a bottom plate, 210 is a stop arm, 220 is a positioning table,

[0035] 300 is a heat conducting member, 310 is a backing plate, 320 is a leg,

[0036] 400 is sealant and 500 is photovoltaic module glass. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] 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; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] New photovoltaic junction box, including:

[0042] The outer shell 100 has a hollow portion 110 extending vertically in the middle; the inner wall of the outer shell is provided with a plurality of buckle slots 120; the outer shell 100 is a raw material outer shell; the material of the surface exposed to air is produced with raw materials to ensure that the weather resistance of the photovoltaic wire box is not reduced;

[0043] The bottom plate 200 is fixedly arranged at the bottom of the shell; the bottom plate 200 is a raw material bottom plate or a recycled material bottom plate; the present case is produced with recycled materials, which can meet the structural functions of the photovoltaic wire box, thereby reducing the cost of the junction box; the bottom plate 200 is provided with upwardly extending barrier arms 210 around it; it is used to wrap the heat conductive member 300; the heat conductive member is located between the barrier arms 210 and the shell 100, further improving the efficiency of heat transfer of the bottom plate 200.

[0044] The heat conducting member 300 is disposed in the buckle slot 120 and is fixed between the housing 100 and the bottom plate 200 by injection molding of the bottom plate 200 .

[0045] like Figure 2 As shown, the cross section of the heat conducting member 300 is an I-shaped structure, and a back platform 310 adapted to the buckling groove 120 is provided on the back.

[0046] To further improve the connection reliability of the heat conducting member 300, a plurality of through holes are provided on the heat conducting member 300 in the area between the housing 100 and the bottom plate 200, so as to improve the connection reliability of the bottom plate 200 after injection molding.

[0047] The cross section of the back stage 310 is rectangular or trapezoidal.

[0048] Specifically, the heat generated by the photovoltaic components on the bottom plate 200 is quickly transferred to the outer shell 100 through the heat conductor 300, thereby improving the heat dissipation surface and heat dissipation efficiency, which can not only effectively ensure the stable operation efficiency of the photovoltaic components, but also meet the application of higher power components.

[0049] Embodiment 2

[0050] like Figure 3 As shown, the bottom of the heat conducting member 300 is provided with a support leg 320 extending into the bottom plate 200 .

[0051] Specifically, the legs 320 extend into the bottom plate 200 , which not only further improves the efficiency of heat transfer from the bottom plate 200 to the housing 100 , but also improves the connection stability between the bottom plate 200 and the housing 100 .

[0052] The cross section of the supporting leg 320 is rectangular or W-shaped.

[0053] Embodiment 3

[0054] like Figure 4As shown, the bottom of the housing 100 is provided with a positioning groove having a trapezoidal cross-section;

[0055] The bottom plate 200 is provided with a positioning platform 220 adapted to the positioning groove.

[0056] Embodiment 4

[0057] like Figure 5 As shown, the heat conducting member 300 extends from the bottom of the housing 100, the legs 320 extend into the bottom plate 200, and the inner side arm of the housing 100 is provided with a plurality of connecting holes extending inwards;

[0058] The heat conducting member 300 is provided with a plurality of through holes corresponding to the connecting holes;

[0059] A plurality of positioning portions 230 are provided on the side of the bottom plate 200 and are inserted into the connection holes.

[0060] Further development, the positioning portion 230 is arranged to be tilted downward in the housing 100, so as to further improve the reliability of the connection between the housing 100 and the base plate 200 and prevent cracking and separation.

[0061] Assembly structure introduction:

[0062] like Figure 6 As shown, after the housing 100 and the bottom plate 200 are fixedly formed, they are fixedly arranged on the photovoltaic module back film or the photovoltaic module glass 500 by means of a sealant 400. The bottom plate 200 is fixed to the photovoltaic module back film by means of a sealant and is not exposed to the external environment, and its weather resistance attenuation is greatly reduced. The bottom plate 200 is made of low-cost recycled materials, which reduces production costs while ensuring product stability.

[0063] In this case, the original single-tube injection molding process is adjusted to a double-tube two-color injection molding process. The shell 100 structure adopts a single-body structure without changing. This process can greatly reduce the mold cost, parts assembly cost, quality control cost, etc. of the wire box shell material.

[0064] A method for preparing a novel photovoltaic junction box comprises the following steps:

[0065] Step 1: In the first cavity of mold A, injection molding is performed through the gate of the material pipe a to form a housing 100 with a buckle groove 120, and the mold is opened after the injection molding is completed;

[0066] Step 2: Add a heat conducting member 300 to the buckle slot 120. The heat conducting member 300 may be made of heat conducting materials such as aluminum, ceramic, graphite, copper, etc., to increase the heat conduction capacity of the wiring box;

[0067] Step 3: Rotate the bottom mold, dock the bottom mold with the B mold, and inject through the b material pipe gate to form a bottom plate 200 connected to the shell 100;

[0068] The material tube in step B can be produced using raw materials, recycled materials, or other plastic materials. The plastic part of the bottom plate 200 is combined with the heat-conducting part 300 to prevent the external structural parts from falling off.

[0069] Step 4: After the injection molding is completed, the outer shell 100 and the bottom plate 200 form a whole, and the internal heat-conducting component 300 is wrapped without leakage.

[0070] Regarding the contents disclosed in this case, there are a few points that need to be explained:

[0071] (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design;

[0072] (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to obtain new embodiments;

[0073] The above are only specific implementation methods disclosed in this case, but the protection scope of the present disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. A new photovoltaic junction box, characterized in that: include: The outer shell (100) has a through hollow portion (110) in the middle; the inner side wall of the outer shell is provided with a plurality of buckle slots (120); A bottom plate (200) is fixedly arranged on the bottom of the housing; The heat conducting component (300) is arranged in the buckle slot (120) and is fixed between the housing (100) and the bottom plate (200) by injection molding of the bottom plate (200).

2. The novel photovoltaic junction box according to claim 1 is characterized in that: The cross section of the heat conducting member (300) is in an I-shaped structure, and a back platform (310) adapted to the buckling groove (120) is provided on the back.

3. The novel photovoltaic junction box according to claim 2 is characterized in that: The bottom of the heat conducting member (300) is provided with a support leg (320) extending into the bottom plate (200).

4. The novel photovoltaic junction box according to claim 3 is characterized in that: The cross section of the supporting leg (320) is rectangular or W-shaped.

5. The novel photovoltaic junction box according to claim 2 or 3, characterized in that: The bottom plate (200) is provided with upwardly extending blocking arms (210) around its periphery; The heat conducting member is located between the barrier arm (210) and the housing (100).

6. The novel photovoltaic junction box according to claim 2 is characterized in that: The cross-section of the back platform (310) is rectangular or trapezoidal.

7. The novel photovoltaic junction box according to claim 1, characterized in that: The bottom of the housing (100) is provided with a positioning groove having a trapezoidal cross-section; The bottom plate (200) is provided with a positioning platform (220) adapted to the positioning groove.

8. The novel photovoltaic junction box according to claim 1, characterized in that: A plurality of through holes are provided on the heat conducting member (300) in an area between the outer shell (100) and the bottom plate (200).

9. The novel photovoltaic junction box according to claim 1, characterized in that: After the outer shell (100) and the bottom plate (200) are fixedly formed, they are fixedly arranged on the photovoltaic module glass (500) by means of a sealant (400).

10. The novel photovoltaic junction box according to claim 1, characterized in that: The shell (100) is a raw material shell; The bottom plate (200) is a recycled material bottom plate.

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