Axial diode and axial diode junction box

Abstract

The utility model discloses an axial diode junction box and a manufacturing method thereof, the axial diode junction box comprises an axial diode and a junction box body, and the axial diode is installed in the junction box body; the axial diode comprises a diode body, a first pin and a second pin, one end of the diode body is connected with the first pin, and the other end of the diode body is connected with the second pin; the direction, close to the junction box body, of the diode body is defined as the front, the first pin comprises a first connecting part and a first flat part, one end of the first connecting part is connected with one end of the diode body, the other end of the first connecting part is connected with the first flat part, and the second pin comprises a second connecting part and a second flat part. One end of the second connecting part is connected with the other end of the diode body, and the other end of the second connecting part is connected with the second flat part; and the diode body is clamped with the junction box body. According to the invention, the production process is simplified, the product cost is reduced, the product reliability is improved, and the production efficiency of a production line is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic junction boxes, and in particular to an axial diode junction box and a manufacturing method thereof. Background Art

[0002] As the application of solar power generation becomes more and more common, the junction boxes closely related to its application are also constantly being innovated. Solar power generation uses multiple groups of solar cell modules arranged in a matrix form to convert sunlight into electrical energy. Each group of solar cell modules is connected to a junction box, which is then connected to other parts of the solar power generation system.

[0003] The diode is a key component in the photovoltaic cell junction box. During use, the diode will generate heat. If this heat is not dissipated in time, it will affect the life of the diode and fail to meet electrical safety requirements. In addition, as the market demand for high-current photovoltaic junction boxes increases, more and more manufacturers use module diodes instead of axial diodes because ordinary axial diodes cannot meet high current requirements. However, the use of module diodes requires the addition of related equipment for module diode packaging and testing, which has high equipment costs and long test cycles. The production process of module diodes for high-current applications is complex and the product cost is high. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem in the prior art that the module diode is used in large currents and the installation process is complicated and expensive, the present invention provides an axial diode junction box and a manufacturing method thereof, which can not only improve the heat dissipation efficiency of the diode and meet the use of large currents, but also has a simple installation process and low cost.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an axial diode junction box, comprising an axial diode and a junction box body, the axial diode is installed inside the junction box body; the axial diode comprises 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 in which the diode body approaches the junction box body is defined as the front, the first pin comprises 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 comprises 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 snap-connected to the junction box body.

[0006] The axial diode junction box of the present invention can be directly welded to the bus bar by pressing a part of the first pin and the second pin of the axial diode into a flat shape, and directly using the first flat part and the second flat part as welding surfaces, thereby eliminating the need to arrange additional connectors (such as conductive sheets) in the junction box, and reducing costs; the first flat part and the second flat part can increase the heat dissipation area of ​​the axial diode, shorten the heat dissipation path (from the original heat dissipation transmitted from the pin to the conductive sheet to the pin being able to directly dissipate heat), improve the heat dissipation effect, and further improve the electricity utilization rate, so that the axial diode of the present invention can meet the application of large current (20A-35A), can replace module diodes, thereby reducing production costs and simplifying installation steps.

[0007] Further, specifically, the length of the first connection portion is at least 1 mm, and the length of the second connection portion is at least 1 mm. This can prevent the diode body from being damaged during stamping.

[0008] Further, specifically, the first flat portion and the second flat portion are both flat-plate-shaped, and when the diode body is snap-fitted to the junction box body, the plane where the first flat portion is located is parallel to the plane of the bottom of the junction box body, and the plane where the second flat portion is located is parallel to the plane of the bottom of the junction box body.

[0009] Further, specifically, the first flat portion and the second flat portion are both L-shaped, and when the diode body is snap-fitted to the junction box body, the first flat portion is perpendicular to the plane of the bottom of the junction box body, and the second flat portion is perpendicular to the plane of the bottom of the junction box body.

[0010] Furthermore, in order to increase the welding area and improve the reliability of welding, the width of the first flat portion is at least 2 mm, the thickness of the first flat portion is at least 0.2 mm, the width of the second flat portion is at least 2 mm, and the thickness of the second flat portion is at least 0.2 mm.

[0011] Furthermore, in order to increase the welding area and improve the reliability of welding, the length of the first flat portion is at least 2 mm, the length of the second flat portion is at least 2 mm, and with the direction perpendicular to the diode body as the front, the distance between the first connecting portion and the rear end of the first flat portion is d1, the distance between the second connecting portion and the rear end of the second flat portion is d2, the distance d1 is at least 1 mm, and the distance d2 is at least 1 mm.

[0012] Further, specifically, with the direction perpendicular to the diode body as the front, part of the first flat portion is bent backward to form an L shape, and part of the second flat portion is bent backward to form an L shape; the first flat portion includes a first horizontal portion and a first vertical portion, one end of the first horizontal portion is fixedly connected to the first connecting portion, and the other end of the first horizontal portion is vertically fixedly connected to the front end of the first vertical portion, the second flat portion includes a second horizontal portion and a second vertical portion, one end of the second horizontal portion is fixedly connected to the second connecting portion, and the other end of the second horizontal portion is vertically fixedly connected to the front end of the second vertical portion, the first horizontal portion, the first vertical portion, the second horizontal portion and the second vertical portion are all flat-plate-shaped, and the plane where the first horizontal portion is located is perpendicular to the plane at the bottom of the junction box body, the plane where the first vertical portion is located is perpendicular to the plane at the bottom of the junction box body, the plane where the second horizontal portion is located is perpendicular to the plane at the bottom of the junction box body, and the plane where the second vertical portion is located is perpendicular to the plane at the bottom of the junction box body.

[0013] Furthermore, in order to increase the welding area and improve the reliability of welding, the length of the first vertical portion is at least 2 mm, and the length of the second vertical portion is at least 2 mm.

[0014] Further, specifically, a first hook, a support seat, a second hook and a baffle are fixedly arranged at the bottom of the junction box body; the first hook is close to the front end of the junction box body, the second hook is close to the rear end of the junction box body, the baffle is located in the middle of the junction box body, the first hook includes a left first hook and a right first hook, the left first hook and the right first hook are arranged in parallel, the distance between the left first hook and the right first hook is d3, the length of the diode body is d4, the distance d3 matches the length d4, the plane A where the left first hook and the right first hook are located is parallel to the plane B where the baffle is located; the support seat includes a left support seat and a right support seat, the left support seat and the right support seat are arranged opposite to each other, the The second hook portion includes a left second hook portion and a right second hook portion, the left second hook portion and the right second hook portion are arranged opposite to each other, and the distance between the left second hook portion and the right second hook portion is greater than the distance d3; when the axial diode is installed in the junction box body, the diode body is located between the left first hook portion and the right first hook portion, and the outer wall of the diode body abuts against the baffle, the first connecting portion abuts against the left first hook portion, the second connecting portion abuts against the right first hook portion, the first flat portion contacts the upper end surface of the left support seat, the second flat portion contacts the upper end surface of the right support seat, the left second hook portion limits the rear end of the first flat portion, and the right second hook portion limits the rear end of the second flat portion. The first hook portion, the second hook portion and the baffle can fix and limit the axial diode, the support seat can support the first flat portion and the second flat portion, and at the same time, the first flat portion and the second flat portion are suspended from the bottom of the junction box body, which can increase the heat dissipation space, thereby improving the heat dissipation effect of the first flat portion and the second flat portion.

[0015] Further, specifically, a third hook, a fourth hook, a first limiting column, a second limiting column and a support block are fixedly arranged at the bottom of the junction box body; the third hook includes a left third hook and a right third hook, the left third hook and the right third hook are arranged in parallel, the fourth hook includes a left fourth hook and a right fourth hook, the left fourth hook and the right fourth hook are arranged in parallel, the left third hook and the left fourth hook are arranged opposite to each other, and the right third hook and the right fourth hook are arranged opposite to each other; the plane where the left third hook and the left fourth hook are located is C, the plane where the right third hook and the right fourth hook are located is D, the plane C is parallel to the plane D, and the distance between the plane C and the plane D is d5, the diode The length of the body is d4, and the distance d5 matches the length d4; the first limiting column and the second limiting column are staggered, the distance between the left end face of the first limiting column and the right end face of the second limiting column is d6, the length of the first horizontal portion is d7, and the distance d6 matches the length d7; when the axial diode is installed in the junction box body, the diode body is located between the plane C and the plane D, the first connecting portion is located between the left third hook and the left fourth hook, the second connecting portion is located between the right third hook and the right fourth hook, the first horizontal portion is located between the rear end face of the first limiting column and the front end face of the second limiting column, and the first vertical portion is against the support block. The third hook and the fourth hook can fix the diode body, the first limiting column and the second limiting column can guide and limit the first flat portion, the support block can support the first flat portion, and at the same time, the first flat portion and the bottom of the junction box body can be suspended, so that the heat dissipation of the first flat portion and the second flat portion can be accelerated, and the heat dissipation effect is improved.

[0016] A method for manufacturing the axial diode junction box as described above comprises the following steps:

[0017] S1: placing an axial diode into a stamping die, first bending a first pin of the axial diode and then stamping and flattening it to obtain a first flat portion, and first bending a second pin of the axial diode and then stamping and flattening it to obtain a second flat portion;

[0018] Alternatively, the axial diode is placed in a stamping die, the first pin of the axial diode is first stamped and flattened and then the flattened portion is bent to obtain a first flat portion, and the second pin of the axial diode is first stamped and flattened and then the flattened portion is bent to obtain a second flat portion;

[0019] S2: Install the formed axial diode inside the junction box body.

[0020] The beneficial effect of the present invention is that the axial diode junction box of the present invention, by pressing a part of the first pin and the second pin of the axial diode into a flat shape, directly uses the first flat part and the second flat part as the welding surface, eliminating the need to arrange additional connectors (such as conductive sheets) in the junction box, which can reduce costs; the first flat part and the second flat part can increase the heat dissipation area of ​​the axial diode, shorten the heat dissipation path (shortened from the original pin to the conductive sheet to the pin directly dissipating heat), improve the heat dissipation effect, and then improve the power utilization rate, so that the axial diode of the present invention can meet the application of large current (20A-35A), can replace the module diode, thereby reducing production costs and simplifying installation steps. The present invention uses the first flat part and the second flat part as the welding surface of the axial diode, and the busbar and the cable can be directly welded to the first flat part and the second flat part, which can reduce the number of solder joints inside the junction box, reduce the number of parts inside the junction box, simplify the production process, reduce product costs, improve product reliability, and improve the production efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of the axial diode junction box of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the axial diode according to the first embodiment of the present invention.

[0024] Figure 3 It is a three-dimensional diagram of the junction box body of the first embodiment of the present invention.

[0025] Figure 4 It is a front view of the junction box body of the first embodiment of the present invention.

[0026] Figure 5 It is a cross-sectional view of the first embodiment of the present invention.

[0027] Figure 6 It is another cross-sectional view of the first embodiment of the present invention.

[0028] Figure 7 It is another structural schematic diagram of the axial diode junction box of the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the axial diode according to the second embodiment of the present invention.

[0030] Fig. 9 It is a front view of the axial diode according to the second embodiment of the present invention.

[0031] Fig.10It is a schematic structural diagram of a junction box body according to the second embodiment of the present invention.

[0032] Fig.11 It is a cross-sectional view of the second embodiment of the present invention.

[0033] Fig.12 It is a flow chart of the manufacturing method of the axial diode junction box of the present invention.

[0034] In the figure: 1, axial diode, 2, junction box body, 11, diode body, 12, first pin, 13, second pin, 121, first connecting portion, 122, first flat portion, 131, second connecting portion, 132, second flat portion, 1221, first horizontal portion, 1222, first vertical portion, 1321, second horizontal portion, 1322, second vertical portion, 21, first hook portion, 22, support seat, 23, second Hook, 24, baffle, 211, left first hook, 212, right first hook, 221, left support seat, 222, right support seat, 231, left second hook, 232, right second hook, 25, third hook, 26, fourth hook, 27, first limiting column, 28, second limiting column, 29, support block, 251, left third hook, 252, right third hook, 261, left fourth hook, 262, right fourth hook. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] 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.

[0038] Embodiment 1

[0039] like Figure 1-6 As shown, an axial diode junction box includes an axial diode 1 and a junction box body 2, wherein the axial diode 1 is installed inside the junction box body 2. The axial diode 1 includes a diode body 11, a first pin 12, and a second pin 13, wherein one end of the diode body 11 is connected to the first pin 12, and the other end of the diode body 11 is connected to the second pin 13; the direction in which the diode body 1 approaches the junction box body 2 is defined as the front. The first pin 12 includes a first connecting portion 121 and a first flat portion 122, wherein one end of the first connecting portion 121 is connected to one end of the diode body 11, and the other end of the first connecting portion 121 is connected to the first flat portion 122; the second pin 13 includes a second connecting portion 131 and a second flat portion 132, wherein one end of the second connecting portion 131 is connected to the other end of the diode body 11, and the other end of the second connecting portion 131 is connected to the second flat portion 132; the diode body 11 is clamped with the junction box body 2.

[0040] The length of the first connection portion 121 is at least 1 mm, and the length of the second connection portion 131 is at least 1 mm. In this way, on the one hand, the diode body 11 will not be affected during stamping, and on the other hand, the busbar can be easily installed on the first connection portion 121 and the second connection portion 131 .

[0041] The first flat portion 122 and the second flat portion 132 are both in the shape of plates. When the diode body 11 is snap-fitted to the junction box body 2 , the plane where the first flat portion 122 is located is parallel to the plane at the bottom of the junction box body 2 , and the plane where the second flat portion 132 is located is parallel to the plane at the bottom of the junction box body 2 .

[0042] The width of the first flat portion 122 is at least 2 mm, the thickness of the first flat portion 122 is at least 0.2 mm, the width of the second flat portion 132 is at least 2 mm, and the thickness of the second flat portion 132 is at least 0.2 mm. Such width and thickness can ensure the strength of the first flat portion 122 and the second flat portion 132, and can ensure that the first flat portion 122 and the second flat portion 132 have sufficient welding surface, so as to facilitate welding with busbars or cables.

[0043] The length of the first flat portion 122 is at least 2 mm, for example, 8 mm, the length of the second flat portion 132 is at least 2 mm, for example, 8 mm, the distance between the first connecting portion 121 and the rear end of the first flat portion 122 is d1, the distance between the second connecting portion 131 and the rear end of the second flat portion 132 is d2, the distance d1 is at least 1 mm, for example, 6 mm, and the distance d2 is at least 1 mm, for example, 6 mm. The reason why d1 and d2 are at least 1 mm is to increase the welding area with the busbar and improve the reliability and firmness of welding.

[0044] The bottom of the junction box body 2 is fixedly provided with a first hook 21, a support seat 22, a second hook 23 and a baffle 24, the first hook 21 is close to the front end of the junction box body 2, the second hook 23 is close to the rear end of the junction box body 2, and the baffle 24 is located in the middle of the junction box body 2. The first hook 21 includes a left first hook 211 and a right first hook 212, the left first hook 211 and the right first hook 212 are arranged in parallel, the distance between the left first hook 211 and the right first hook 212 is d3, the length of the diode body 11 is d4, the distance d3 matches the length d4, it is convenient to install the diode body 11, and the diode body 11 can be limited at the same time. The plane A where the left first hook 211 and the right first hook 212 are located is parallel to the plane B where the baffle 24 is located. When the diode body 11 is installed on the left first hook 211 and the right first hook 212, the baffle 24 can limit and support the diode body 11. The support seat 22 includes a left support seat 221 and a right support seat 222, and the left support seat 221 and the right support seat 222 are arranged opposite to each other. The second hook 23 includes a left second hook 231 and a right second hook 232, and the left second hook 231 and the right second hook 232 are arranged opposite to each other, and the distance between the left second hook 231 and the right second hook 232 is greater than the distance d3. When the axial diode 1 is installed in the junction box body 2, the diode body 11 is located between the left first hook 211 and the right first hook 212, and the outer wall of the diode body 11 abuts against the baffle 24, the first connecting portion 121 abuts against the left first hook 211, the second connecting portion 131 abuts against the right first hook 212, the first flat portion 122 contacts the upper end surface of the left support seat 221, the second flat portion 132 contacts the upper end surface of the right support seat 222, the left second hook 231 limits the rear end of the first flat portion 122, and the right second hook 232 limits the rear end of the second flat portion 132. In this embodiment, the support seat 22 is a cross-shaped support seat, which supports the first flat portion 122 and the second flat portion 132 more firmly.

[0045] Embodiment 2

[0046] like Figure 7-10As shown, an axial diode junction box includes an axial diode 1 and a junction box body 2, wherein the axial diode 1 is installed inside the junction box body 2. The axial diode 1 includes a diode body 11, a first pin 12, and a second pin 13. One end of the diode body 11 is connected to the first pin 12, and the other end of the diode body 11 is connected to the second pin 13. The direction in which the diode body 1 approaches the junction box body 2 is defined as the front. The first pin 12 includes a first connecting portion 121 and a first flat portion 122. One end of the first connecting portion 121 is connected to one end of the diode body 11, and the other end of the first connecting portion 121 is connected to the first flat portion 122. The second pin 13 includes a second connecting portion 131 and a second flat portion 132. One end of the second connecting portion 131 is connected to the other end of the diode body 11, and the other end of the second connecting portion 131 is connected to the second flat portion 132. The diode body 11 is snap-fitted to the junction box body 2.

[0047] The length of the first connection portion 121 is at least 1 mm, and the length of the second connection portion 131 is at least 1 mm.

[0048] The first flat portion 122 and the second flat portion 132 are both L-shaped. When the diode body 11 is clamped with the junction box body 2 , the first flat portion 122 is perpendicular to the plane of the bottom of the junction box body 2 , and the second flat portion 132 is perpendicular to the plane of the bottom of the junction box body 2 .

[0049] The width of the first flat portion 122 is at least 2 mm, such as 6 mm, and the thickness of the first flat portion 122 is at least 0.2 mm. The width of the second flat portion 132 is at least 2 mm, such as 6 mm, and the thickness of the second flat portion 132 is at least 0.2 mm.

[0050] Part of the first flat portion 122 is bent backward to form an L shape, and part of the second flat portion 132 is bent backward to form an L shape. The first flat portion 122 includes a first horizontal portion 1221 and a first vertical portion 1222, one end of the first horizontal portion 1221 is fixedly connected to the first connecting portion 121, and the other end of the first horizontal portion 1221 is vertically fixedly connected to the front end of the first vertical portion 1222, and the second flat portion 132 includes a second horizontal portion 1321 and a second vertical portion 1322, one end of the second horizontal portion 1321 is fixedly connected to the second connecting portion 131, and the other end of the second horizontal portion 1321 is vertically fixedly connected to the front end of the second vertical portion 1322. The first horizontal portion 1221, the first vertical portion 1222, the second horizontal portion 1321 and the second vertical portion 1322 are all in the shape of a plate, and the plane where the first horizontal portion 1221 is located is perpendicular to the plane at the bottom of the junction box body 2, the plane where the first vertical portion 1222 is located is perpendicular to the plane at the bottom of the junction box body 2, the plane where the second horizontal portion 1321 is located is perpendicular to the plane at the bottom of the junction box body 2, and the plane where the second vertical portion 1322 is located is perpendicular to the plane at the bottom of the junction box body 2. The length of the first vertical portion 1222 is at least 2 mm, for example, 6 mm, and the length of the second vertical portion 1322 is at least 2 mm, for example, 6 mm.

[0051] The third hook 25, the fourth hook 26, the first limiting column 27, the second limiting column 28 and the support block 29 are fixedly arranged at the bottom of the junction box body 2. The third hook 25 includes a left third hook 251 and a right third hook 252, and the left third hook 251 and the right third hook 252 are arranged in parallel. The fourth hook 26 includes a left fourth hook 261 and a right fourth hook 262, and the left fourth hook 261 and the right fourth hook 262 are arranged in parallel. The left third hook 251 and the left fourth hook 261 are arranged oppositely, and the right third hook 252 and the right fourth hook 262 are arranged oppositely; the plane where the left third hook 251 and the left fourth hook 261 are located is C, and the plane where the right third hook 252 and the right fourth hook 262 are located is D, and the plane C is parallel to the plane D, and the distance between the plane C and the plane D is d5, and the length of the diode body 11 is d4, and the distance d5 matches the length d4. The first limiting column 27 and the second limiting column 28 are staggered, the distance between the left end face of the first limiting column 27 and the right end face of the second limiting column 28 is d6, the length of the first horizontal portion 1221 is d7, and the distance d6 matches the length d7; when the axial diode 1 is installed in the junction box body 2, the diode body 11 is located between plane C and plane D, the first connecting portion 121 is located between the left third hook 251 and the left fourth hook 261, the second connecting portion 131 is located between the right third hook 252 and the right fourth hook 262, the first horizontal portion 1221 is located between the rear end face of the first limiting column 27 and the front end face of the second limiting column 28, and the first vertical portion 1222 is against the support block 29.

[0052] Embodiment 3

[0053] like Fig.11 As shown, a method for manufacturing an axial diode junction box comprises the following steps:

[0054] S1: Place the axial diode 1 into a stamping die, bend the first pin 12 of the axial diode 1 and then stamp and flatten it to obtain a first flat portion 122, and bend the second pin 13 of the axial diode 1 and then stamp and flatten it to obtain a second flat portion 132.

[0055] Alternatively, the axial diode 1 is placed in a stamping die, the first pin 12 of the axial diode 1 is first stamped and flattened and then the flattened part is bent to obtain a first flat portion 122, and the second pin 13 of the axial diode 1 is first stamped and flattened and then the flattened part is bent to obtain a second flat portion 132.

[0056] S2: Install the formed axial diode 1 into the junction box body 2.

[0057] The axial diode junction boxes of the first and second embodiments can be prepared through steps S1-S2.

[0058] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An axial diode, the axial diode (1) being installed inside a junction box body (2), characterized in that: The axial diode (1) comprises a diode body (11), a first pin (12) and a second pin (13); one end of the diode body (11) is connected to the first pin (12), and the other end of the diode body (11) is connected to the second pin (13); The first pin (12) comprises a first connecting portion (121) and a first flat portion (122), one end of the first connecting portion (121) is connected to one end of the diode body (11), and the other end of the first connecting portion (121) is connected to the first flat portion (122); The second pin (13) comprises a second connecting portion (131) and a second flat portion (132), one end of the second connecting portion (131) is connected to the other end of the diode body (11), and the other end of the second connecting portion (131) is connected to the second flat portion (132); The first flat portion (122) and the second flat portion (132) are directly used as welding surfaces to be directly welded to the busbar and / or cable; The length of the first flat portion (122) is at least 2 mm, and the length of the second flat portion (132) is at least 2 mm; The width of the first flat portion (122) is at least 2 mm, and the width of the second flat portion (132) is at least 2 mm.

2. The axial diode according to claim 1, characterized in that A portion of the first pin (11) and the second pin (12) of the axial diode are pressed into a flat shape to form a first flat portion (122) and a second flat portion (132).

3. The axial diode according to claim 1 or 2, characterized in that: The axial diode can meet the application of large current 20A-35A.

4. The axial diode according to claim 1 or 2, characterized in that: The plane where the first flat portion (122) is located is parallel to the plane of the bottom of the junction box body, and the plane where the second flat portion (132) is located is parallel to the plane of the bottom of the junction box body.

5. The axial diode according to claim 1 or 2, characterized in that: The distance between the first connecting portion (121) and the rear end of the first flat portion (122) is d1; the distance between the second connecting portion and the rear end of the second flat portion is d2, the distance d1 is at least 1 mm, and the distance d2 is at least 1 mm; and / or the thickness of the first flat portion (122) is at least 0.2 mm, and the thickness of the second flat portion (132) is at least 0.2 mm; And / or the length of the first connecting portion (121) is at least 1 mm, and the length of the second connecting portion (131) is at least 1 mm.

6. The axial diode according to claim 1 or 2, characterized in that: The first connecting portion (121) and the first flat portion (122) are in an L shape; the second connecting portion (131) and the second flat portion (132) are in an L shape.

7. The axial diode according to claim 6, characterized in that The first flat portion (122) is perpendicular to the plane of the bottom of the junction box body (2), and the second flat portion (132) is perpendicular to the plane of the bottom of the junction box body (2); And / or the first flat portion (122) comprises a first horizontal portion (1221) and a first vertical portion (1222), and one end of the first horizontal portion (1221) is fixedly connected to the first connecting portion (121); The other end of the first horizontal portion (1221) is vertically fixedly connected to the front end of the first vertical portion (1222); the second flat portion (132) comprises a second horizontal portion (1321) and a second vertical portion (1322); one end of the second horizontal portion (1321) is fixedly connected to the second connecting portion (131); and the other end of the second horizontal portion (1321) is vertically fixedly connected to the front end of the second vertical portion (1322).

8. An axial diode junction box, characterized in that: It comprises the axial diode (1), a junction box body (2) and a bus bar as claimed in any one of claims 1 to 7.

9. The axial diode junction box according to claim 8, characterized in that: A first hook (21), a second hook (23) and a support seat (22) are fixedly arranged at the bottom of the junction box body (2); The first hook portion (21) is close to the front end of the junction box body (2), and the second hook portion (23) is close to the rear end of the junction box body (2); The baffle (24) is located in the middle of the junction box body (2); the first hook portion (21) comprises a left first hook portion (211) and a right first hook portion (212); the left first hook portion (211) and the right first hook portion (212) are arranged in parallel; the distance between the left first hook portion (211) and the right first hook portion (212) is d3; the length of the diode body (11) is d4; the distance d3 matches the length d4; And / or the plane A where the left first hook (211) and the right first hook (212) are located is parallel to the plane B where the baffle (24) is located.

10. The axial diode junction box according to claim 9, characterized in that: The support seat (22) comprises a left support seat (221) and a right support seat (222), and the left support seat (221) and the right support seat (222) are arranged opposite to each other; The second hook portion (23) comprises a left second hook portion (231) and a right second hook portion (232), the left second hook portion (231) and the right second hook portion (232) are arranged opposite to each other, and the distance between the left second hook portion (231) and the right second hook portion (232) is greater than the distance d3; When the axial diode (1) is installed in the junction box body (2), the diode body (11) is located between the left first hook (211) and the right first hook (212), and the outer side wall of the diode body (11) abuts against the baffle (24); The first connecting portion (121) abuts against the left first hook portion (211), and the second connecting portion (131) abuts against the right first hook portion (212); The first flat portion (122) contacts the upper end surface of the left support seat (221), the second flat portion (132) contacts the upper end surface of the right support seat (222), the left second hook portion (231) limits the rear end of the first flat portion (122), and the right second hook portion (232) limits the rear end of the second flat portion (132); and / or a third hook (25) and a fourth hook (26) are fixedly arranged at the bottom of the junction box body (2), the third hook (25) comprises a left third hook (251) and a right third hook (252), the left third hook (251) and the right third hook (252) are arranged in parallel, the fourth hook (26) comprises a left fourth hook (261) and a right fourth hook (262), the left fourth hook (261) and the right fourth hook (262) are arranged in parallel; The left third hook portion (251) and the left fourth hook portion (261) are arranged opposite to each other, and the right third hook portion (252) and the right fourth hook portion (262) are arranged opposite to each other; The plane where the left third hook (251) and the left fourth hook (261) are located is C, the plane where the right third hook (252) and the right fourth hook (262) are located is D, the plane C is parallel to the plane D, and the distance between the plane C and the plane D is d5; the length of the diode body (11) is d4, and the distance d5 matches the length d4.

11. An axial diode junction box, characterized in that: The invention comprises an axial diode (1) and a junction box body (2), wherein the axial diode (1) is installed inside the junction box body (2); the axial diode (1) comprises a diode body (11), a first pin (12) and a second pin (13); one end of the diode body (11) is connected to the first pin (12), and the other end of the diode body (11) is connected to the second pin (13); the direction in which the diode body (1) is close to the junction box body (2) is defined as the front; The first pin (12) comprises a first connection portion (121) and a first flat portion (122); one end of the first connection portion (121) is connected to one end of the diode body (11), and the other end of the first connection portion (121) is connected to the first flat portion (122); the second pin (13) comprises a second connection portion (131) and a second flat portion (132); one end of the second connection portion (131) is connected to the other end of the diode body (11), and the other end of the second connection portion (131) is connected to the second flat portion (132); the diode body (11) is snap-fitted to the junction box body (2).

12. The axial diode junction box according to claim 11, characterized in that: The first flat portion (122) and the second flat portion (132) are directly used as welding surfaces to be directly welded to bus bars and / or cables.

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