Axial diode photovoltaic module and junction box

Abstract

The utility model relates to an axial diode photovoltaic assembly, which comprises an axial diode, two terminal sheets and two radiating fins, the terminal sheets are arranged at an interval, the axial diode photovoltaic assembly also comprises two radiating fins arranged at an interval, a packaging part of the axial diode is positioned between the two terminal sheets, the terminal sheets are provided with stamping parts, and the stamping parts are arranged on the radiating fins. Two pins of the axial diode are respectively positioned in the stamping parts of the corresponding terminal sheets and are welded and fixed with the stamping parts, the two radiating fins are positioned below the terminal sheets and are welded and fixed on the corresponding terminal sheets, and the two pins of the axial diode are positioned between the stamping parts and the radiating fins. The radiating fin is provided with a radiating fin limiting hole used for fixing. The radiating fin is good in connectivity, excellent in radiating effect and low in cost.

Description

Technical Field

[0001] This utility model relates to an axial diode photovoltaic junction box, belonging to the field of photovoltaic technology. Background Technology

[0002] A solar junction box is a connector that sits between the solar cell array (composed of solar cell modules) and the solar charging control device, providing users with a combined connection solution for solar panels. Double-glass solar modules consist of two layers of glass on opposite sides and solar cells located between the glass layers. Glass has better insulation than a backsheet, allowing double-glass modules to withstand higher system voltages and offering significant advantages in abrasion resistance, making them suitable for photovoltaic power plants in areas with high levels of acid rain or salt spray. Due to its different structure from backsheet solar modules, it generally uses a separate junction box.

[0003] Chinese patent document CN202110881967.5 discloses an axial diode junction box and its manufacturing method, including an axial diode and a junction box body. The axial diode is installed inside the junction box body. The axial diode includes a diode body, a first pin, and a second pin. One end of the diode body is connected to the first pin, and the other end of the diode body is connected to the second pin. The direction of the diode body near the junction box body is defined as the front. The first pin includes a first connecting portion and a first flat portion. One end of the first connecting portion is connected to one end of the diode body, and the other end of the first connecting portion is connected to the first flat portion. The second pin includes a second connecting portion and a second flat portion. One end of the second connecting portion is connected to the other end of the diode body, and the other end of the second connecting portion is connected to the second flat portion. The diode body is snapped into the junction box body. The diode in this patent has poor heat dissipation performance, and the sealing of the box body is inadequate. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an axial diode photovoltaic module with good connectivity, excellent heat dissipation, and low cost.

[0005] The present invention provides a technical solution to solve the above-mentioned technical problems: an axial diode photovoltaic module, comprising an axial diode and terminal pieces, wherein there are two terminal pieces spaced apart, and two heat sinks spaced apart, wherein the encapsulation part of the axial diode is located between the two terminal pieces, and the terminal pieces are provided with stamping parts, wherein the two leads of the axial diode are respectively located in the stamping parts of the corresponding terminal pieces and are welded and fixed to the stamping parts, wherein the two heat sinks are located below the terminal pieces and are welded and fixed to the corresponding terminal pieces, wherein the two leads of the axial diode are located between the stamping parts and the heat sinks, and the heat sinks are provided with heat sink limiting holes for fixing.

[0006] Preferably, the stamped portion is an arc shape with an opening facing downwards.

[0007] Preferably, the terminal piece is a copper sheet and the heat sink is an aluminum sheet.

[0008] Preferably, the area of ​​the heat sink is larger than the area of ​​the terminal piece, and the heat sink and the terminal piece are welded together by laser welding to form an L-shaped welded part.

[0009] Preferably, one end of the terminal piece is provided with a crimping portion for connecting cables.

[0010] Preferably, each of the two terminal pieces has a solder block on its top, and the heat sink has a busbar slot. There are two busbars that pass through the busbar slot of the heat sink from the bottom upwards and are welded and fixed to the solder block on the terminal piece.

[0011] Preferably, the terminal piece has a terminal piece limiting hole, the terminal piece limiting hole and the heat sink limiting hole have the same shape and size, and the terminal piece limiting hole and the heat sink limiting hole are aligned vertically.

[0012] Preferably, the heat sink limiting holes of the two heat sinks are respectively located at the adjacent part of the stamping part and at one end of the encapsulation part near the diode.

[0013] Preferably, each heat sink has at least two heat sink positioning holes.

[0014] Another technical solution proposed by this utility model to solve the above-mentioned technical problems is: an axial diode photovoltaic module junction box, including a box body and an axial diode photovoltaic module, wherein the axial diode photovoltaic module is fixed in the box body.

[0015] This invention has the following advantages: The axial diode photovoltaic module of this invention welds and fixes the heat sink and the terminal piece. The welded part is L-shaped, which improves the bonding strength between the terminal piece and the heat sink. Moreover, the size of the terminal piece only needs to exceed the size of the welded part, so as to minimize the size of the terminal piece. By setting a limiting hole on the heat sink, when the limiting post in the housing is heat-fused and fixed to the limiting hole of the heat sink, the terminal piece is also fixed at the same time, which greatly reduces the production cost. Attached Figure Description

[0016] The following description, in conjunction with the accompanying drawings, further illustrates an axial diode photovoltaic module according to this utility model.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1;

[0018] Figure 2 This is a three-dimensional exploded structural diagram of Embodiment 1;

[0019] Figure 3 for Figure 1 Bottom view of the middle terminal piece;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2;

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 3;

[0022] Figure 6 This is a schematic diagram of the structure of embodiment 4.

[0023] The above figures are labeled as follows:

[0024] Axial diode 1, package 11, pin 12, terminal piece 2, stamping part 21, welding part 22, terminal piece limiting hole 23, crimping part 24, heat sink 3, heat sink limiting hole 31, solder block 4, housing 5. Detailed Implementation

[0025] Example 1

[0026] See Figures 1 to 3 An axial diode photovoltaic module includes an axial diode 1 and a terminal piece 2. The terminal piece 2 has two pieces and is spaced apart. It also includes two spaced heat sinks 3. The encapsulation part 11 of the axial diode 1 is located between the two terminal pieces. The terminal piece 2 is provided with a stamping part 21. The two leads 12 of the axial diode 1 are respectively located in the stamping part 21 of the corresponding terminal piece 2 and are welded and fixed to the stamping part 21. The two heat sinks 3 are located below the terminal pieces 2 and are welded and fixed to the corresponding terminal pieces 2. The two leads 12 of the axial diode 1 are located between the stamping part 21 and the heat sink 3. The heat sink 3 is provided with a heat sink limiting hole 31 for fixing.

[0027] The stamped part 21 is an arc shape with an opening facing downwards. The terminal piece 2 is a copper sheet, and the heat sink 3 is an aluminum sheet.

[0028] The area of ​​heat sink 3 is larger than the area of ​​terminal piece 2. Heat sink 3 and terminal piece 2 are welded together by laser welding to form an L-shaped welded part 22.

[0029] One end of the terminal piece 2 is provided with a crimping part 24 for connecting cables.

[0030] Each of the two terminal pieces 2 has a solder block 4 on its top. The heat sink 3 has a busbar slot. There are two busbars that pass through the busbar slot of the heat sink 3 from the bottom and are welded and fixed to the solder block 4 on the terminal piece 2.

[0031] The terminal piece 2 has four terminal piece limiting holes 23 at its four ends. The terminal piece limiting holes 23 extend to the heat sink 3 at its bottom. The heat sink 3 has two heat sink limiting holes 31 at one end near the package part 11 of the diode 1. The heat sink 3 has four other heat sink limiting holes 31 at the four ends corresponding to the terminal piece limiting holes 23. The heat sink limiting holes 31 have the same shape and size as the terminal piece limiting holes 23.

[0032] Example 2

[0033] See Figure 4 The rest of the axial diode photovoltaic module in this embodiment is the same as that in embodiment 1, except that: the terminal plate 2 does not have a terminal plate limiting hole 23, and each of the two heat sinks 3 has two heat sink limiting holes 31, which are respectively located at the adjacent part of the stamping part 21 and at one end of the encapsulation part 11 near the diode 1.

[0034] Example 3

[0035] See Figure 5 The rest of the axial diode photovoltaic module in this embodiment is the same as that in embodiment 1, except that the heat sink 3 does not have a heat sink limiting hole 31 at one end of the encapsulation part 11 near the diode 1.

[0036] Example 4

[0037] See Figure 6 A junction box includes a box body 5 and an axial diode photovoltaic module, the axial diode photovoltaic module being fixed inside the box body 5.

[0038] Obviously, the above embodiments are merely examples for clearly illustrating the embodiments of this utility model, and are not intended to limit the embodiments of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the spirit of this utility model are still within the protection scope of this utility model.

Claims

1. An axial diode photovoltaic module, comprising an axial diode (1) and terminal pieces (2), wherein there are two terminal pieces (2) spaced apart, characterized in that, It also includes two spaced heat sinks (3), the encapsulation part (11) of the axial diode (1) is located between the two terminal pieces, the terminal piece (2) is provided with a stamping part (21), the two pins (12) of the axial diode (1) are respectively located in the stamping part (21) of the corresponding terminal piece (2) and are welded and fixed to the stamping part (21), the two heat sinks (3) are located below the terminal piece (2) and are welded and fixed to the corresponding terminal piece (2), the two pins (12) of the axial diode (1) are located between the stamping part (21) and the heat sink (3), and the heat sink (3) is provided with a heat sink limiting hole (31) for fixing.

2. The axial diode photovoltaic module according to claim 1, characterized in that, The stamping part (21) is an arc shape with an opening facing downwards.

3. The axial diode photovoltaic module according to claim 1, characterized in that, The terminal piece (2) is a copper piece, and the heat sink (3) is an aluminum piece.

4. The axial diode photovoltaic module according to claim 1, characterized in that, The area of ​​the heat sink (3) is larger than the area of ​​the terminal piece (2), and the heat sink (3) and the terminal piece (2) are welded together by laser welding to form an L-shaped welded part (22).

5. The axial diode photovoltaic module according to any one of claims 1 to 4, characterized in that, One end of the terminal piece (2) is provided with a crimping part (24) for connecting cables.

6. The axial diode photovoltaic module according to any one of claims 1 to 4, characterized in that, The top of each of the two terminal pieces (2) is provided with a solder block (4). The heat sink (3) is provided with a busbar slot. There are two busbars that pass through the busbar slot of the heat sink (3) from the bottom of the heat sink (3) and are welded and fixed to the solder block (4) on the terminal piece (2).

7. The axial diode photovoltaic module according to any one of claims 1 to 4, characterized in that, Terminal plate (2) is provided with terminal plate limiting hole (23). The terminal plate limiting hole (23) and the heat sink limiting hole (31) are the same in shape and size. The terminal plate limiting hole (23) and the heat sink limiting hole (31) are aligned vertically.

8. The axial diode photovoltaic module according to any one of claims 1 to 4, characterized in that, The heat sink limiting holes (31) of the two heat sinks (3) are respectively located at the adjacent part of the stamping part (21) and at one end of the encapsulation part (11) near the diode (1).

9. The axial diode photovoltaic module according to any one of claims 1 to 4, characterized in that, Each heat sink (3) has at least two heat sink limiting holes (31).

10. A junction box, characterized in that, It includes a housing (5) and an axial diode photovoltaic module as described in claim 1, wherein the axial diode photovoltaic module is fixed inside the housing (5).

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