Axial diode module

Abstract

The utility model relates to an axial diode module, which comprises an axial diode and terminal sheets, the terminal sheets are two metal sheets which are arranged at intervals, two pins of the axial diode are respectively welded and fixed on the corresponding terminal sheets, and the axial diode module also comprises two radiating fins which are arranged at intervals, the radiating fins are located below the terminal pieces and attached to the bottoms of the corresponding terminal pieces, each terminal piece is provided with at least two folding parts which are folded downwards, the radiating fins are provided with notch parts which are matched with the folding parts, and the folding parts are inserted into the corresponding notch parts and are in interference fit with the corresponding notch parts. The axial diode module provided by the utility model is compact in structure, tight in fitting and good in heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to an axial diode module, belonging to the technical field of photovoltaics. Background Art

[0002] Photovoltaic modules primarily consist of bypass diodes, copper conductive terminals, cables, and connectors. The positive and negative electrodes of the bypass diodes are electrically connected to the copper conductive terminals through welding processes. The copper conductive terminals have holes for busbars and a pre-storage area for solder. When the junction box is assembled with the photovoltaic module, the module's busbars pass through the holes and are soldered to the copper plate, connecting the two pins of the diode to the module's busbars. This junction box design requires first forming the copper conductive terminals through a stamping process, and then welding the bypass diodes to the positive and negative copper conductive terminals to form a bypass protection module. Its function is to conduct the current and voltage generated by the entire array of cells in the solar photovoltaic module to the outside. It is a critical component in solar power generation systems used to connect the photovoltaic module panels and inverters. It is a comprehensive, cross-disciplinary design that integrates electrical design, mechanical design, and materials science.

[0003] Chinese patent document CN219145336U discloses a new type of axial diode photovoltaic junction box, including a box body, a cover plate, terminals, an axial diode and a cable. The box body is in the shape of a horizontal long strip, and the cover plate is detachably fixed to the top of the box body. The terminals are two metal sheets arranged laterally at intervals. An extended diode connection part is provided at one longitudinal end of the terminal, a busbar connection part is provided at the top of the terminal, and a first folded edge and a second folded edge extending downward are respectively provided at both transverse ends of the terminal. The axial diode is arranged laterally between the two terminals and on one side of the diode connection part. Extended L-shaped pins are provided at both ends of the axial diode. The bottom of the diode connection part is connected to the L-shaped pin near the axial diode, and the end of the L-shaped pin away from the axial diode is connected to the cable. A boss is provided at the inner bottom of the box body, and the terminal is fitted and fixed on the boss. The heat dissipation efficiency of the diode module in this patent is average. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an axial diode module with compact structure, close fitting and good heat dissipation effect.

[0005] The utility model proposes a technical solution to solve the above technical problems: an axial diode module, including an axial diode and a terminal piece, the terminal piece is two metal pieces arranged at intervals, the two pins of the axial diode are respectively welded and fixed on the corresponding terminal piece, and also includes two heat sinks arranged at intervals, the heat sinks are located below the terminal piece and are attached to the bottom of the corresponding terminal piece, each terminal piece is provided with at least two downwardly folded parts, the heat sink is provided with a notch part matching the folded part, the folded part is inserted into the corresponding notch part and is interference connected.

[0006] The folded portion is located at the edge of the heat sink, the notch portion is located at the edge of the heat sink, and the folded portion is perpendicular to the heat sink.

[0007] The folded portion is rectangular, and the notch portion is a rectangular hole.

[0008] The packaging part of the axial diode is located between two terminal pieces, and a stamping groove is provided on the terminal piece. The two pins of the axial diode are respectively located in the stamping grooves of the corresponding terminal pieces and are welded and fixed to the stamping grooves. The heat sink is provided with a stamping part that matches the shape of the packaging part of the axial diode.

[0009] The stamping portion is in an arc shape, and the stamping portion is entirely attached to the surface of the packaging portion of the axial diode, and the arc of the stamping portion is 150°.

[0010] The stamping groove of the terminal piece is arc-shaped with the notch facing upwards. The shape of the stamping groove matches the pin shape of the axial diode. A stamping groove notch matching the stamping groove is opened on the heat sink, and the stamping groove is located within the stamping groove notch.

[0011] The terminal piece is a copper piece, and the heat sink is an aluminum piece; a tin block is provided on the upper surface of the terminal piece.

[0012] Each terminal piece is provided with at least two terminal piece limiting holes, the heat sink is provided with a heat sink limiting hole cocentric with the terminal piece limiting hole, and the heat sink is provided with a bus bar notch for the bus bar to pass through.

[0013] An extension portion is provided in a horizontal direction at the end of the heat sink away from the axial diode.

[0014] The terminal piece is provided with a crimping portion for fixing the cable.

[0015] The present utility model has positive effects: the axial diode module of the present utility model adds a heat sink that fits on the terminal piece below the terminal piece, and the terminal piece has a folded portion that matches the notch portion of the heat sink. The two are interference fit, so that the terminal piece and the heat sink fit more tightly, so that the axial diode and the heat sink have better large-area contact, and the terminal piece and the heat sink have better large-area contact, and the heat dissipation effect is significantly improved. The axial diode of the axial diode module of the present utility model is located between the terminal piece and the heat sink, and the heat sink is formed into a shape that matches the axial diode by stamping, so that the axial diode and the heat sink have large-area contact, and the heat dissipation effect can be significantly improved. The axial diode module of the present utility model has a compact structure, and the terminal piece, the axial diode and the heat sink can be tightly fitted together through simple assembly, which is conducive to automated mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The axial diode module of the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the axial diode module of Example 1;

[0018] Figure 2 This is a schematic diagram of the three-dimensional exploded structure of the axial diode module of Example 1;

[0019] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure installed in the junction box;

[0020] Figure 4 This is a structural diagram of Example 2.

[0021] The above-mentioned reference numerals are as follows:

[0022] Axial diode 1, terminal piece 2, stamping groove 21, folding portion 23, terminal piece limiting hole 24, crimping portion 25, heat sink 3, notch portion 31, crimping portion 32, heat sink limiting hole 33, busbar notch 34, extension portion 35, stamping groove notch 36, tin block 4. DETAILED DESCRIPTION Example 1

[0023] See Figure 1 and Figure 2The axial diode module of this embodiment includes an axial diode 1, a terminal piece 2 and a heat sink 3. The terminal piece 2 is two metal pieces spaced apart, and the two pins of the axial diode 1 are respectively welded and fixed on the corresponding terminal piece 2. There are two heat sinks 3 spaced apart, and the heat sink 3 is located below the terminal piece 2 and fits on the bottom of the corresponding terminal piece 2. One terminal piece 2 is provided with two folding parts 23 that fold downward, and the other terminal piece 2 is provided with three folding parts 23 that fold downward. The heat sink 3 is provided with a notch 31 that matches the folding part 23. The folding part 23 is located at the edge of the heat sink 3, and the notch 31 is located at the edge of the heat sink 3, and the folding part 23 is perpendicular to the heat sink 3. The folding part 23 is rectangular, and the notch 31 is a rectangular hole. The folding part 23 is inserted into the corresponding notch 31 and is interference-connected, so that the terminal piece 2 and the heat sink 3 are fixedly connected together.

[0024] The packaging part of the axial diode 1 is located between two terminal pieces 2, and a stamping groove 21 is provided on the terminal piece 2. The two pins of the axial diode 1 are respectively located in the stamping grooves 21 of the corresponding terminal pieces 2 and are welded and fixed to the stamping grooves 21. The heat sink 3 is provided with a stamping part 32 that matches the shape of the packaging part of the axial diode 1.

[0025] The stamped portion 32 is arc-shaped and fits completely against the surface of the package portion of the axial diode 1. The arc of the stamped portion 32 is 150°. The stamped groove 21 of the terminal piece 2 is arc-shaped with the notch facing upward. The shape of the stamped groove 21 matches the shape of the pins of the axial diode 1. The heat sink 3 is provided with a stamped groove notch 36 that matches the stamped groove 21, and the stamped groove 21 is located within the stamped groove notch 36.

[0026] Each terminal piece 2 is provided with at least two terminal piece limiting holes 24 , the heat sink 3 is provided with a heat sink limiting hole 33 cocentric with the terminal piece limiting hole 24 , and the heat sink 3 is provided with a bus bar notch 34 for the bus bar to pass through.

[0027] The terminal piece 2 is a copper piece, and the heat sink 3 is an aluminum piece. A tin block 4 is provided on the upper surface of the terminal piece 2.

[0028] See Figure 3 When installing, the axial diode module of this embodiment is fixed in the box body of the photovoltaic junction box. The limiting column at the bottom of the box body of the photovoltaic junction box passes through the heat sink limiting hole 33 and the terminal piece limiting hole 24 and fixes the heat sink 3 and the terminal piece 2 in the box body by self-heat melting or cold pressing. Example 2

[0029] See Figure 4The rest of the axial diode module of this embodiment is the same as that of embodiment 1, except that: the heat sink 3 is provided with a horizontal extension portion 53, and the terminal piece 2 is not provided with a crimping portion 25 for fixing the cable.

[0030] Obviously, the above embodiments are merely examples for the purpose of clearly illustrating the embodiments of the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. However, obvious variations or modifications arising from the spirit of the present invention remain within the scope of protection of the present invention.

Claims

1. An axial diode module, comprising an axial diode (1) and a terminal piece (2), wherein the terminal piece (2) is two metal pieces arranged at an interval, and two pins of the axial diode (1) are respectively welded and fixed on corresponding terminal pieces (2), characterized in that: It also comprises two heat sinks (3) arranged at intervals, the heat sinks (3) being located below the terminal pieces (2) and affixed to the bottom of the corresponding terminal pieces (2), each terminal piece (2) being provided with at least two folded portions (23) folded downward, the heat sink (3) being provided with notches (31) matching the folded portions (23), the folded portions (23) being inserted into the corresponding notches (31) and being interference-connected.

2. The axial diode module according to claim 1, characterized in that: The folded portion (23) is located at the edge of the heat sink (3), the notch portion (31) is located at the edge of the heat sink (3), and the folded portion (23) is perpendicular to the heat sink (3).

3. The axial diode module according to claim 2, characterized in that: The folded portion (23) is rectangular, and the notch portion (31) is a rectangular hole.

4. The axial diode module according to claim 1, characterized in that: The packaging portion of the axial diode (1) is located between two terminal pieces (2), the terminal piece (2) is provided with a stamping groove (21), the two pins of the axial diode (1) are respectively located in the stamping groove (21) of the corresponding terminal piece (2) and are fixed to the stamping groove (21) by welding, and the heat sink (3) is provided with a stamping portion (32) matching the shape of the packaging portion of the axial diode (1).

5. The axial diode module according to claim 4, characterized in that: The stamping portion (32) is in an arc shape, the stamping portion (32) is entirely attached to the surface of the packaging portion of the axial diode (1), and the arc of the stamping portion (32) is 30° to 180°.

6. The axial diode module according to claim 4, characterized in that: The stamping groove (21) of the terminal sheet (2) is arc-shaped with the notch facing upwards, the shape of the stamping groove (21) matches the shape of the pin of the axial diode (1), the heat sink (3) is provided with a stamping groove notch (36) matching the stamping groove (21), and the stamping groove (21) is located within the stamping groove notch (36).

7. The axial diode module according to any one of claims 1 to 6, characterized in that: The terminal piece (2) is a copper piece, and the heat sink (3) is an aluminum piece; a tin block (4) is provided on the upper surface of the terminal piece (2).

8. The axial diode module according to any one of claims 1 to 6, characterized in that: Each terminal piece (2) is provided with at least two terminal piece limiting holes (24), the heat sink (3) is provided with a heat sink limiting hole (33) cocentrically arranged with the terminal piece limiting hole (24), and the heat sink (3) is provided with a bus bar notch (34) for a bus bar to pass through.

9. The axial diode module according to any one of claims 1 to 6, characterized in that: An end of the heat sink (3) away from the axial diode (1) is provided with an extension portion (35) arranged in a horizontal direction.

10. The axial diode module according to any one of claims 1 to 6, characterized in that: The terminal piece (2) is provided with a crimping portion (25) for fixing the cable.

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