Small photovoltaic split junction box

Abstract

The application discloses a small photovoltaic split junction box, which comprises a bottom box and a box cover, the bottom box has an inner cavity with an upper opening, a left terminal and a right terminal are fixed in the inner cavity, the left terminal is provided with a left busbar through hole extending in the front-back direction, the right terminal is provided with a right busbar through hole extending in the front-back direction, the right side front part of the left terminal is provided with a front connecting plate extending to the right, the left side rear part of the right terminal is provided with a rear connecting plate extending to the left, two poles of a diode are welded on the front connecting plate and the rear connecting plate respectively, the front connecting plate and the rear connecting plate have a gap, and the downward projection of the center of the diode falls in the gap. The application has the advantages of small size, good heat dissipation and good quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic accessories, in particular to a small photovoltaic split junction box. BACKGROUND

[0002] In the preparation of a common photovoltaic split junction box, the terminals of the welded diode are first loaded into the plastic base, then the column is fixed to the terminal by the equipment, and the diode is on one side of the two bus bar holes. In order to prevent the positive and negative terminals from short-circuiting, the side of the terminal needs to be bent 90 degrees. This method also ensures the minimum cross-sectional area of the terminal, but it is not convenient for tin paste production. SUMMARY

[0003] The purpose of the present application is to provide a small photovoltaic split junction box, which has the characteristics of small size, good heat dissipation and good quality.

[0004] The technical scheme adopted by the present application is: a small photovoltaic split junction box, the small photovoltaic split junction box comprises a bottom box and a box cover, the bottom box has an inner cavity with an upper opening, and the inner cavity is fixed with a left terminal and a right terminal, the left terminal is provided with a left bus bar hole extending in the front and rear direction, the right terminal is provided with a right bus bar hole extending in the front and rear direction, and the right side of the left terminal is provided with a front connecting plate extending to the right, the left side of the right terminal is provided with a rear connecting plate extending to the left, and the center of the diode is welded on the front connecting plate and the rear connecting plate, respectively, and the front connecting plate and the rear connecting plate have a gap, and the center of the diode is welded on the front connecting plate and the rear connecting plate, respectively.

[0005] The middle part of the front connecting plate and the middle part of the rear connecting plate are provided with recessed positioning belts, and the upper end and the lower end of the diode are respectively clamped in the two recessed positioning belts.

[0006] The left side of the left terminal located in the left bus bar hole is provided with a left recessed area, and the right side of the right terminal located in the right bus bar hole is provided with a right recessed area.

[0007] The front and rear parts of the left side of the bottom of the inner cavity are respectively provided with two left positioning columns, and the front and rear parts of the right side of the bottom are respectively provided with two right positioning columns, the rear projections of the two left positioning columns do not coincide, the rear projections of the two right positioning columns do not coincide, and the left terminal is provided with two left positioning holes matched with the left positioning columns, and the right terminal is provided with two right positioning holes matched with the right positioning columns.

[0008] The upper surface of the box cover is in an arc shape with the middle part upward and the edge downward.

[0009] The inner cavity side wall of the bottom box has four inner corners, and the box cover is clamped inside the inner cavity of the bottom box from top to bottom, so that the box cover has four outer corners, at least one C corner and at least one R corner in the four inner corners, and correspondingly, at least one C corner and at least one R corner in the four outer corners.

[0010] At least three supporting blocks protruding downward are arranged on the lower side of the bottom box.

[0011] The downward projection of the front connecting plate, the diode and the rear connecting plate is an oblong strip extending in the front-rear direction, and the rightward projection of the left bus bar perforation and the right bus bar perforation completely coincides.

[0012] Compared with the prior art, the present application has the advantages of small size, good heat dissipation, good quality and low cost. The small photovoltaic split terminal box of the present application adopts a diode and is assembled at the center of two bus bar holes. The diode can directly dissipate heat with maximum area, improving the reliability of the product. At the same time, the length, width and height of the product are reduced, the use of raw materials is reduced, and the cost of the product is correspondingly reduced. In addition, the hollow design is adopted in the middle of the terminal to avoid the position deviation phenomenon during the diode patching and furnace welding process, and to avoid the probability of defective products in the process. In addition, by arranging the bus bar holes on both sides of the diode, the amount of copper sheet can be greatly reduced, and the copper sheet can be directly connected with the positive and negative electrodes of the diode to realize circuit connection. By vertically arranging the diode, that is, the connection of the two ends of the diode is parallel to the connection of the two bus bar perforations, the copper sheet does not need to be bent, realizing the shortest distance connection of the diode and the copper sheet circuit, thereby having good connection quality. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in conjunction with the drawings and examples:

[0014] Figure 1 is a perspective exploded view of the small photovoltaic split terminal box of the embodiment of the present application (the following figures are enlarged compared with Figure 1 );

[0015] Figure 2 is an enlarged view of Figure 1 some parts in ;

[0016] Figure 3 is a perspective view of the left terminal and the right terminal of the present application in cooperation;

[0017] Figure 4 is a perspective view of the left terminal, the right terminal and the diode of the present application in cooperation;

[0018] Figure 5 is a front view of one of the split terminal boxes of the present application;

[0019] Figure 6 is Figure 5 a plan view.

[0020] in the figure:

[0021] 10, bottom box, 11, inner cavity, 111, left positioning column, 112, right positioning column, 12, support block;

[0022] 21, left terminal, 211, left bus bar perforation, 212, left recessed area, 213, front connecting plate, 214, left positioning hole, 22, right terminal, 221, right bus bar perforation, 222, right recessed area, 223, rear connecting plate, 224, right positioning hole, 23, gap, 24, recessed positioning belt;

[0023] 30, diode;

[0024] 40, box cover;

[0025] C, C angle, R, R angle. DETAILED DESCRIPTION

[0026] In the following embodiments, for the convenience of description, it is assumed that the observer is the boundary, the rear is close to the observer, and the front is away from the observer. At the same time, in the present embodiment, since the split terminal box usually has three terminal boxes with substantially the same structure, only one of the split terminal boxes is described.

[0027] Embodiment, see Figures 1 to 6As shown: small photovoltaic split junction box, including the bottom box 10 and box cover 40. The bottom box 10 has the upper opening of the inner cavity 11, and the inner cavity 11 is fixed with the left terminal 21 and the right terminal 22. The left terminal 21 is provided with the left bus bar perforation 211 extending in the front and back direction, and the right terminal 22 is provided with the right bus bar perforation 221 extending in the front and back direction. That is, the left bus bar perforation 211 and the right bus bar perforation 221 are both strip holes. The right side of the left terminal 21 is provided with the front connecting plate 213 extending to the right, and the left side of the right terminal 22 is provided with the rear connecting plate 223 extending to the left. That is, the front connecting plate 213 is farther away from the observer than the rear connecting plate 223. At the same time, the two poles of a diode 30 are welded on the front connecting plate 213 and the rear connecting plate 223 respectively. The gap 23 is provided between the front connecting plate 213 and the rear connecting plate 223, and the downward projection of the center of the diode 30 falls within the gap 23. In this embodiment, the diode 30 has a little overlap with the front connecting plate 213 and the rear connecting plate 223 except for the front and the rear, and the rest of the downward projection falls within the gap 23, and the diode 30 can use the commercially available micro diode, and the chip is welded between the two terminals, so that the appearance of the diode 30 is greatly reduced and thinned. In this way, the hollow design is equivalent to using a diode, which reduces the volume of the product, forms good heat dissipation, and at the same time, reduces the cost of the product.

[0028] Optimized:

[0029] The middle part of the front connecting plate 213 and the middle part of the rear connecting plate 223 are provided with recessed positioning bands 24. The upper end and the lower end of the diode 30 are slightly inserted into the two recessed positioning bands 24 respectively. In this way, the diode 30 is not easy to slide, and the fixation is relatively stable.

[0030] The left recessed area 212 is provided on the left side of the left bus bar perforation 211 of the left terminal 21, and the right recessed area 222 is provided on the right side of the right bus bar perforation 221 of the right terminal 22. In other words, the left bus bar perforation 211 is actually located at the rightmost edge of the right part of the left recessed area 212; the right bus bar perforation 221 is located at the leftmost edge of the left part of the right recessed area 222. In this way, it is convenient to set the bus bar, and the bus bar is relatively stable.

[0031] Continue to optimize:

[0032] The front and rear of the bottom left side of the inner cavity 11 are respectively provided with two left positioning columns 111, and the front and rear of the bottom right side of the inner cavity 11 are respectively provided with two right positioning columns 112. The rear projections of the two left positioning columns 111 do not coincide, and the rear projections of the two right positioning columns 112 do not coincide. At the same time, the left end 21 is provided with two left positioning holes 214 matched with the two left positioning columns 111, and the right end 22 is provided with two right positioning holes 224 matched with the two right positioning columns 112. That is, the two left positioning holes 214 are sleeved on the two left positioning columns 111, and the two right positioning holes 224 are sleeved on the two right positioning columns 112. In this way, on the basis of better fixation, a foolproof design is also formed, and the probability of misassembling the left end 21 and the right end 22 is reduced.

[0033] The upper surface of the box cover 40 is arc-shaped with the middle part being higher and the edge being lower. In this way, the product has greater pressure resistance and is not easy to be damaged.

[0034] The side wall of the inner cavity 11 of the bottom box 10 has four inner corners, and the box cover 40 is clamped inside the inner cavity 11 of the bottom box 10 from top to bottom, so that the box cover 40 has four outer corners. At least one of the four inner corners is a C corner C and at least one is an R corner R, and correspondingly, at least one of the four outer corners is a C corner C and at least one is an R corner R. That is, the C corner in the inner corner and the C corner in the outer corner are matched; the R corner in the inner corner and the R corner in the outer corner are matched. In this way, the probability of misassembling the bottom box 10 and the box cover 40 is reduced.

[0035] In addition:

[0036] The bottom side of the bottom box 10 is provided with at least three downward protruding support blocks 12. That is, after the bottom box 10 is fixed on a certain plane, it still has good heat dissipation capacity.

[0037] The downward projections of the front connecting plate 213, the diode 30 and the rear connecting plate 223 are an extended rectangular strip in the front-rear direction. At the same time, the right projections of the left busbar perforations 211 and the right busbar perforations 221 completely coincide. In this way, the quality of the small photovoltaic split junction box is better.

[0038] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A small photovoltaic split junction box, characterized in that: The small photovoltaic split junction box includes a base box (10) and a cover (40). The base box (10) has an inner cavity (11) with an upper opening, and a left terminal (21) and a right terminal (22) are fixed in the inner cavity (11). The left terminal (21) is provided with a left busbar through hole (211) extending in the front-back direction, and the right terminal (22) is provided with a right busbar through hole (221) extending in the front-back direction. The right front part is provided with a front connecting plate (213) extending to the right, and the left rear part of the right terminal (22) is provided with a rear connecting plate (223) extending to the left. Meanwhile, the two poles of a diode (30) are respectively soldered to the front connecting plate (213) and the rear connecting plate (223). There is a gap (23) between the front connecting plate (213) and the rear connecting plate (223), and the downward projection of the center of the diode (30) falls within the gap (23). The middle part of the front connecting plate (213) and the middle part of the rear connecting plate (223) are provided with recessed positioning bands (24). The upper end and lower end of the diode (30) are respectively locked in the two recessed positioning bands (24) to avoid the position displacement of the diode (30) during the chip mounting and reflow soldering process.

2. The small photovoltaic split junction box according to claim 1, characterized in that: The left terminal (21) has a left recessed area (212) located to the left of the left busbar perforation (211), and the right terminal (22) has a right recessed area (222) located to the right of the right busbar perforation (221).

3. The small photovoltaic split junction box according to claim 1, characterized in that: The bottom left side of the inner cavity (11) is provided with two left positioning posts (111) at the front and rear parts respectively, and the bottom right side is provided with two right positioning posts (112) at the front and rear parts respectively. The rearward projections of the two left positioning posts (111) do not coincide, and the rearward projections of the two right positioning posts (112) do not coincide. At the same time, the left terminal (21) is provided with two left positioning holes (214) that match the left positioning posts (111) in pairs, and the right terminal (22) is provided with two right positioning holes (224) that match the right positioning posts (112) in pairs.

4. The small photovoltaic split junction box according to claim 1, characterized in that: The upper surface of the lid (40) is an arc shape with the center slightly above and the edges slightly below.

5. The small photovoltaic split junction box according to claim 1, characterized in that: The inner cavity (11) sidewall of the bottom box (10) has 4 inner corners, and the lid (40) is fitted inside the inner cavity (11) of the bottom box (10) from top to bottom, so that the lid (40) has 4 outer corners. Among the 4 inner corners, there is at least one C-corner (C) and at least one R-corner (R). Correspondingly, among the 4 outer corners, there is at least one C-corner (C) and at least one R-corner (R).

6. The small photovoltaic split junction box according to claim 1, characterized in that: The bottom box (10) has at least three downward protruding support blocks (12) on its lower side.

7. The small photovoltaic split junction box according to claim 1, characterized in that: The downward projection of the front connecting plate (213), diode (30), and rear connecting plate (223) is a rectangular strip extending in the front-to-back direction. At the same time, the rightward projections of the left busbar perforation (211) and the right busbar perforation (221) completely overlap.

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