Chip diode photovoltaic junction box

Abstract

The utility model discloses a chip diode photovoltaic junction box, which comprises a box body, a box cover, two terminal sheets and diodes, the box cover is detachably fixed at the top of the box body, the terminal sheets are fixed in the box body, the chip diode photovoltaic junction box further comprises radiating fins, the number of the terminal sheets is two, and the terminal sheets are arranged in the box body at intervals along the length direction of the box body. The diode is arranged between the two terminal pieces and connected with the two terminal pieces respectively, the number of the cooling fins is two, the cooling fins are located on the two sides of the diode, the cooling fins are flatly attached to the corresponding terminal pieces, and the cooling fins and the terminal pieces are fixed together in a laser welding mode. The chip diode photovoltaic junction box is convenient to install and excellent in heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to a chip 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 CN113328698B 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 closest to 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. This invention simplifies the manufacturing process, reduces product costs, improves product reliability, and increases production line efficiency. However, this patent has a complex structure and low heat dissipation performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a photovoltaic junction box that is easy to install and has excellent heat dissipation performance.

[0005] The technical solution provided by this utility model to solve the above-mentioned technical problems is as follows: a chip diode photovoltaic junction box, including a box body, a box cover, terminal plates and diodes. The box cover is detachably fixed to the top of the box body. The terminal plates are fixed inside the box body. The box body also includes heat sinks. There are two terminal plates, which are spaced apart inside the box body along the length of the box body. The diodes are located between the two terminal plates and are connected to the two terminal plates respectively. There are two heat sinks located on both sides of the diodes. The heat sinks are flatly attached to the corresponding terminal plates and are laser welded to the terminal plates.

[0006] In a further preferred embodiment, the area of ​​the heat sink is smaller than the area of ​​the terminal piece, the heat sink is a rectangular aluminum sheet, the heat sink is fixedly connected to the bottom of the terminal piece, and the bottom of the housing is provided with a limiting groove that matches the shape and position of the heat sink.

[0007] In a further preferred embodiment, the bottom of the box body is provided with two limiting protrusions symmetrically arranged along the length direction of the box body, and limiting protrusions are provided on both sides of the limiting protrusions; both sides of the terminal piece are provided with rectangular notches, the rectangular notches are matched with the shape and size of the limiting protrusions, the top of the limiting protrusions abuts against the bottom of the terminal piece, and the limiting protrusions are inserted into the rectangular notches of the terminal piece.

[0008] In a further preferred embodiment, the two limiting bosses are provided with a slope at one end that is close to each other, the slope extending from the limiting bosses to the bottom of the housing, and the bottom of the diode abuts against the two slopes.

[0009] In a further preferred embodiment, the terminal piece is provided with a busbar through groove at one end near the diode, and the limiting boss is provided with a busbar through hole that matches the position and size of the busbar through groove.

[0010] In a further preferred embodiment, the terminal piece is provided with a solder groove.

[0011] In a further preferred embodiment, each of the two limiting protrusions is provided with a limiting post on both sides of the end that is far apart from each other. The terminal piece is provided with a terminal piece limiting opening that matches the shape and size of the limiting post. The limiting post passes through the corresponding terminal piece limiting opening and fixes the terminal piece in the box body by its own heat melting or cold pressing.

[0012] In a further preferred embodiment, the heat sink is provided with a heat sink limiting port corresponding to the position of the terminal plate limiting port, and the limiting post passes through the corresponding terminal plate limiting port and the heat sink limiting port.

[0013] A further preferred embodiment includes a cable and a cable clamp. One end of the housing is provided with a crimping interface, and reinforcing plates are provided on both sides of the crimping interface. The terminal piece is provided with a crimping part corresponding to the position of the crimping interface. One end of the cable is crimped and fixed in the crimping part, and the other end of the cable extends out of the housing through the cable clamp groove. The cable clamp is fixedly connected in the cable clamp groove by ultrasonic welding to limit the cable.

[0014] In a further preferred embodiment, a handle is provided on one side of the outer surface of the box.

[0015] This utility model has positive effects:

[0016] (1) The chip diode photovoltaic junction box of this utility model has a heat sink fixed on the terminal piece by laser welding, which can effectively increase the heat dissipation area of ​​the terminal piece and improve the heat dissipation effect of the photovoltaic junction box.

[0017] (2) The inner wall of the chip diode photovoltaic junction box of this utility model is provided with snap-fit ​​protrusions on both sides, which can be detachably and fixedly connected with the snap-fit ​​interface provided on the box cover. The installation is convenient and the box body and the box cover can be quickly fixed by snap-fit, thereby improving the installation efficiency.

[0018] (3) The bottom of the chip diode photovoltaic junction box of this utility model is provided with a limiting boss. The limiting boss is provided with a limiting protrusion that matches the rectangular notch on the terminal piece. A slope is provided between the two limiting protrusions that matches the diode between the terminal pieces. The heat sink is embedded in the limiting groove, which ensures the stability of the diode installation and makes the installation very convenient. The space design is ingenious. Attached Figure Description

[0019] The chip diode photovoltaic junction box of this utility model will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of the photovoltaic junction box of Example 1 after the cover has been removed;

[0021] Figure 2 This is a schematic diagram of the structure of the terminal blocks, diodes, and heat sink of the photovoltaic junction box in Example 1;

[0022] Figure 3 This is a schematic diagram of the structure of the photovoltaic junction box in Example 1, including the terminal blocks, diodes, and heat sink, viewed from below.

[0023] Figure 4 This is a schematic diagram of the structure of the photovoltaic junction box in Example 1;

[0024] Figure 5 This is a schematic diagram of the photovoltaic junction box in Example 2.

[0025] The above figures are labeled as follows:

[0026] Box 1, limiting boss 11, limiting protrusion 111, slope 112, busbar through hole 113, limiting post 114, limiting groove 115, crimp interface 12, reinforcing plate 13, crimp groove 14, recess 15, handle 18, terminal piece 3, rectangular notch 31, solder bath 32, crimp part 33, busbar through groove 34, terminal piece limiting port 35, cable 4, diode 5, heat sink 6. Detailed Implementation

[0027] Example 1, see Figures 1 to 4The photovoltaic junction box for the chip diode in this embodiment includes a box body 1, a cover, terminal pieces 3, diodes 5, and heat sinks 6. The cover is detachably fixed to the top of the box body 1, and the terminal pieces 3 are fixed inside the box body 1. There are two terminal pieces 3, which are spaced apart along the length of the box body 1 inside the box body 1. The diodes 5 are located between the two terminal pieces 3 and are connected to the two terminal pieces 3 respectively. There are two heat sinks 6, which are located on both sides of the diodes 5. The heat sinks 6 are flatly attached to the corresponding terminal pieces 3 and are laser-welded to the terminal pieces 3.

[0028] The area of ​​the heat sink 6 is smaller than that of the terminal plate 3, and the heat sink 6 is a rectangular aluminum sheet. The heat sink 6 is fixedly connected to the bottom of the terminal plate 3, and the bottom of the housing 1 is provided with a limiting groove 115 that matches the shape and position of the heat sink 6.

[0029] The bottom of the housing 1 has two symmetrically arranged limiting protrusions 11 along the length of the housing 1, and limiting protrusions 111 on both sides of each limiting protrusion 11. The terminal piece 3 has rectangular notches 31 on both sides, the shape and size of which match the limiting protrusions 111. The top of the limiting protrusion 11 abuts against the bottom of the terminal piece 3, and the limiting protrusions 111 and the rectangular notches 31 of the terminal piece 3 are inserted into each other. A slope 112 is provided at one end of each limiting protrusion 11, extending from the limiting protrusion 11 to the bottom of the housing 1, and the bottom of the diode 5 abuts against the two slopes 112. A busbar through-slot 34 is provided at the end of the terminal piece 3 near the diode 5, and a busbar through-hole 113 matching the position and size of the busbar through-slot 34 is provided on the limiting protrusion 11. A solder groove 32 is provided on the terminal piece 3. Both sides of the two limiting protrusions 11 that are far apart from each other are provided with limiting posts 114. The terminal piece 3 is provided with a terminal piece limiting opening 35 that matches the shape and size of the limiting post 114. The limiting post 114 passes through the corresponding terminal piece limiting opening 35 and fixes the terminal piece 3 in the box 1 by its own heat melting or cold pressing.

[0030] The chip diode photovoltaic junction box in this embodiment also includes a cable 4 and a wire clamp. One end of the box body 1 is provided with a crimp interface 12, and reinforcing plates 13 are provided on both sides of the crimp interface 12. The terminal piece 3 is provided with a crimping part 33 corresponding to the position of the crimp interface 12. One end of the cable 4 is crimped and fixed in the crimping part 33, and the other end of the cable 4 passes through the wire clamp groove and extends out of the box body 1. The wire clamp is fixedly connected in the wire clamp groove by ultrasonic welding to limit the cable 4.

[0031] In this embodiment, during the installation process, the photovoltaic junction box is secured by the rectangular notch 31 of the terminal piece 3 and the limiting protrusion 111. The limiting post and its corresponding terminal piece limiting port are fixed in the box by heat fusion, thereby realizing the quick positioning and installation of the terminal piece 3 on the limiting protrusion 11. The diode 5 between the two terminal pieces 3 is engaged and fixed with the slope 112 set on the side of the limiting protrusion 11 that is close to each other. The bottom of the diode 5 abuts against the slope 112. The heat sink 6 is located in the limiting groove 115.

[0032] Example 2, see Figure 5 The chip diode photovoltaic junction box of this embodiment is the same as that of embodiment 1, except that there is no cable 4 and wire clip, and a handle 18 is provided on one side of the box body 1.

[0033] Example 3: The chip diode photovoltaic junction box of this example is the same as that of Example 1, except that the heat sink 6 is provided with a heat sink limiting port corresponding to the position of the terminal plate limiting port 35, and the limiting post 114 passes through the corresponding terminal plate limiting port 35 and the heat sink limiting port.

[0034] 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. A photovoltaic junction box for a chip diode, comprising a box body (1), a cover, terminal pieces (3), and a diode (5), wherein the cover is detachably fixed to the top of the box body (1), and the terminal pieces (3) are fixed inside the box body (1), characterized in that, It also includes a heat sink (6), there are two terminal pieces (3) and they are spaced apart in the box (1) along the length direction of the box (1), the diode (5) is located between the two terminal pieces (3) and is connected to the two terminal pieces (3) respectively, there are two heat sinks (6) and they are located on both sides of the diode (5), the heat sink (6) is flatly attached to the corresponding terminal piece (3) and is laser welded to the terminal piece (3) together.

2. The chip diode photovoltaic junction box according to claim 1, characterized in that, The area of ​​the heat sink (6) is smaller than the area of ​​the terminal piece (3). The heat sink (6) is a rectangular aluminum sheet. The heat sink (6) is fixedly connected to the bottom of the terminal piece (3). The bottom of the box (1) is provided with a limiting groove (115) that matches the shape and position of the heat sink (6).

3. The chip diode photovoltaic junction box according to claim 1, characterized in that, The bottom of the box body (1) is provided with two limiting protrusions (11) symmetrically arranged along the length direction of the box body (1). Both sides of the limiting protrusions (11) are provided with limiting protrusions (111). Both sides of the terminal piece (3) are provided with rectangular notches (31). The rectangular notches (31) match the shape and size of the limiting protrusions (111). The top of the limiting protrusions (11) abuts against the bottom of the terminal piece (3). The limiting protrusions (111) and the rectangular notches (31) of the terminal piece (3) are inserted into each other.

4. A chip diode photovoltaic junction box according to claim 1, characterized in that, Two limiting bosses (11) are provided with a slope (112) at one end that is close to each other. The slope (112) extends from the limiting bosses (11) to the bottom of the box (1). The bottom of the diode (5) abuts against the two slopes (112).

5. A chip diode photovoltaic junction box according to claim 3, characterized in that, The terminal piece (3) is provided with a busbar through groove (34) at one end near the diode (5), and the limiting boss (11) is provided with a busbar through hole (113) that matches the position and size of the busbar through groove (34).

6. A chip diode photovoltaic junction box according to claim 1, characterized in that, The terminal piece (3) has a solder groove (32).

7. A chip diode photovoltaic junction box according to claim 1, characterized in that, Two limiting protrusions (11) are provided with limiting posts (114) on both sides of the ends of the two limiting protrusions (114) that are far apart from each other. The terminal piece (3) is provided with a terminal piece limiting opening (35) that matches the shape and size of the limiting post (114). The limiting post (114) passes through the corresponding terminal piece limiting opening (35) and fixes the terminal piece (3) in the box body (1) by its own hot melting or cold pressing.

8. A chip diode photovoltaic junction box according to claim 7, characterized in that, The heat sink (6) has a heat sink limiting port corresponding to the position of the terminal plate limiting port (35), and the limiting post (114) passes through the corresponding terminal plate limiting port (35) and the heat sink limiting port.

9. A chip diode photovoltaic junction box according to any one of claims 1 to 8, characterized in that, It also includes a cable (4) and a wire clip. One end of the box (1) is provided with a crimping interface (12). The crimping interface (12) is provided with reinforcing plates (13) on both sides. The terminal piece (3) is provided with a crimping part (33) corresponding to the position of the crimping interface (12). One end of the cable (4) is crimped and fixed in the crimping part (33). The other end of the cable (4) passes through the wire clip groove and extends out of the box (1). The wire clip is fixedly connected in the wire clip groove by ultrasonic welding to limit the cable (4).

10. A chip diode photovoltaic junction box according to any one of claims 1 to 8, characterized in that, A handle (18) is provided on one side of the outer side of the box (1).

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