Photovoltaic junction box

Abstract

The utility model discloses a photovoltaic junction box, which comprises a box body, a box cover, two terminal pieces and diodes, the box cover is detachably fixed at the top of the box body, the terminal pieces are fixed in the box body, the number of the terminal pieces is two, and the terminal pieces are arranged in the box body at intervals along the length direction of the box body. The diode is arranged between the two terminal sheets and is respectively connected with the two terminal sheets, the bottom of the box body is provided with two limiting bosses which are symmetrically arranged along the length direction of the box body, and the two sides of each limiting boss are respectively provided with a limiting convex block; rectangular notches are formed in the two sides of the terminal piece, the rectangular notches are matched with the limiting protruding blocks in shape and size, the top of the limiting boss abuts against the bottom of the terminal piece, and the limiting protruding blocks are matched with the rectangular notches of the terminal piece in an inserted mode; the photovoltaic junction box is convenient to install and excellent in heat dissipation performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of photovoltaic junction boxes, belong to photovoltaic technical field. BACKGROUND

[0002] Solar junction box is the connector between solar cell array and solar charging control device, which provides a combination connection scheme for solar cell panel. Double-glass solar cell module is composed of two layers of glass on the front and back sides and solar cell pieces in the middle of the glass layers. The insulation of glass is better than backsheet, and double-glass module can meet higher system voltage. It has obvious wear resistance advantage and is suitable for photovoltaic power station in areas with more acid rain or salt fog. Because its structure is different from backsheet solar cell module, a split junction box is usually used.

[0003] Chinese patent document CN113328698B discloses an axial diode junction box and a manufacturing method thereof, 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 with the first pin, the other end of the diode body is connected with the second pin; the direction of the diode body close to the junction box 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, 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, the other end of the second connecting part is connected with the second flat part; the diode body is clamped with the junction box body. By using the present application, the production process is simplified, the product cost is reduced, the reliability of the product is improved, and the production efficiency of the production line is improved. The structure of the patent is complex, and the heat dissipation performance is low. SUMMARY

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

[0005] The utility model provides a technical scheme for solving the above technical problem: a photovoltaic junction box, comprising a box body, a box cover, a terminal sheet and a diode, the box cover is detachably fixed on the top of the box body, the terminal sheet is fixed in the box body, the terminal sheet has two pieces and is arranged in the box body along the length direction of the box body, the diode is arranged between the two terminal sheets and connected with the two terminal sheets respectively, the bottom of the box body is provided with two limiting bosses which are symmetrically arranged along the length direction of the box body, limiting bosses are provided with limiting blocks on both sides; both sides of the terminal sheet are provided with rectangular notches, the shape and size of the rectangular notches match with the limiting blocks, the top of the limiting boss abuts against the bottom of the terminal sheet, and the limiting block is inserted and matched with the rectangular notch of the terminal sheet.

[0006] Preferably, the two limiting bosses are provided with slope surfaces at the ends close to each other, the slope surfaces extend from the limiting bosses to the bottom of the box body, and the bottom of the diode abuts against the two slope surfaces.

[0007] Preferably, the terminal sheet is provided with a bus bar through slot at the end close to the diode, and the limiting boss is provided with a bus bar through hole matching the position and size of the bus bar through slot.

[0008] Preferably, the two limiting bosses are provided with limiting columns at the ends away from each other, the terminal sheet is provided with a terminal sheet limiting opening matching the shape and size of the limiting column, and the limiting column is fixed in the box body by hot melting or cold pressing of the limiting column through the corresponding terminal sheet limiting opening.

[0009] Preferably, the terminal sheet is provided with a soldering groove.

[0010] Preferably, the box cover is embedded in the top of the box body, the box cover is provided with a clamping opening at the two ends along the length direction, the box body is provided with a clamping protrusion matching the clamping opening on the inner wall of the two ends along the length direction, two trapezoidal notches are formed in one side of the top of the box body, and the side edge of the box cover is attached to the inner wall of the box body when the box cover is clamped and fixed with the box body.

[0011] Preferably, the length of the box body is 70-75 mm, the width of the box body is 22-27 mm, and the height of the box body is 11-15 mm.

[0012] Preferably, the utility model also comprises a cable and a cable clamp, one end of the box body is provided with a crimping opening, the two sides of the crimping opening are provided with reinforcing plates, the terminal sheet is provided with a crimping part corresponding to the position of the crimping opening, one end of the cable is crimped and fixed in the crimping part, the other end of the cable extends out of the box body through a cable clamp slot, and the cable clamp is fixedly connected in the cable clamp slot through ultrasonic welding to limit the cable.

[0013] Preferably, four recesses are formed in the top of the cable clamp slot of the box body.

[0014] Preferably, a handle is arranged on one side of the box body.

[0015] The utility model has the following positive effects:

[0016] (1) The inner wall of the box body of the utility model is provided with clamping protrusions on the two sides, and the clamping openings arranged on the box cover are detachably fixedly connected, so that the box cover and the box body are quickly fixed through clamping, and the installation efficiency is improved.

[0017] (2) The photovoltaic junction box of the utility model has a limiting boss at the bottom of the box body, limiting bosses and rectangular notches arranged on the terminal sheet are matched, a slope surface is arranged between the two limiting bosses and matched with the diode between the terminal sheet, the stability of the diode installation is ensured, the installation is very convenient, and the space design is ingenious. BRIEF DESCRIPTION OF DRAWINGS

[0018] The photovoltaic junction box of the utility model will be further described below in combination with the drawings.

[0019] Figure 1 It is a structure schematic view of the photovoltaic junction box of example 1.

[0020] Figure 2 It is an internal structure schematic view of the photovoltaic junction box of example 1.

[0021] Figure 3 It is a terminal sheet structure schematic view of the photovoltaic junction box of example 1.

[0022] Figure 4 It is a box body structure schematic view of the photovoltaic junction box of example 1.

[0023] Figure 5 It is Figure 4 It is another view structure schematic view.

[0024] Figure 6 It is a structure schematic view of the photovoltaic junction box of example 2.

[0025] The above-mentioned reference signs are as follows:

[0026] Box body 1, limiting boss 11, limiting boss 111, slope surface 112, bus bar through hole 113, limiting column 114, crimping port 12, reinforcing plate 13, rectangular groove 14, recessed part 15, clamping protrusion 16, trapezoidal notch 17, handle 18, box cover 2, clamping port 21, terminal sheet 3, rectangular notch 31, soldering groove 32, crimping part 33, bus bar through groove 34, terminal sheet limiting port 35, cable 4, diode 5, wire clamp 6. DETAILED DESCRIPTION

[0027] Example 1, see Figures 1 to 5The photovoltaic junction box of the embodiment comprises a box body 1, a box cover 2, terminal pieces 3 and diodes 5. The box cover 2 is detachably fixed on the top of the box body 1. The terminal pieces 3 are fixed in the box body 1. The terminal pieces 3 are two and are arranged in the box body 1 along the length direction of the box body 1. The diodes 5 are arranged between the two terminal pieces 3 and are connected with the two terminal pieces 3 respectively. The bottom of the box body 1 is provided with two limiting bosses 11 which are symmetrically arranged along the length direction of the box body 1. The two sides of the limiting boss 11 are provided with limiting blocks 111. The two sides of the terminal piece 3 are provided with rectangular notches 31. The shape and size of the rectangular notches 31 are matched with the limiting blocks 111. The top of the limiting boss 11 is in abutment with the bottom of the terminal piece 3. The limiting block 111 is insertedly matched with the rectangular notch 31 of the terminal piece 3. The end of the two limiting bosses 11 close to each other is provided with a slope surface 112. The slope surface 112 extends from the limiting boss 11 to the bottom of the box body 1. The bottom of the diode 5 is in abutment with the two slope surfaces 112. The end of the terminal piece 3 close to the diode 5 is provided with a bus bar through groove 34. The limiting boss 11 is provided with a bus bar through hole 113 which is matched with the position and size of the bus bar through groove 34.

[0028] The two sides of the end of the two limiting bosses 11 away from each other are provided with limiting columns 114. The terminal piece 3 is provided with terminal piece limiting openings 35 which are matched with the shape and size of the limiting columns 114. The limiting column 114 passes through the corresponding terminal piece limiting opening 35 and fixes the terminal piece 3 in the box body 1 by hot melting or cold pressing of the limiting column 114 itself. The terminal piece 3 is provided with soldering grooves 32.

[0029] The box cover 2 is embedded in the top of the box body 1. The two ends of the box cover 2 along the length direction are provided with clamping openings 21. The inner walls of the two ends of the box body 1 along the length direction are provided with clamping protrusions 16 which are matched with the clamping openings 21. One side of the top of the box body 1 is provided with two trapezoidal notches 17. When the box cover 2 is clamped and fixed with the box body 1, the side of the box cover 2 is in abutment with the inner wall of the box body 1.

[0030] The length of the box body 1 is 70 mm. The width of the box body 1 is 27 mm. The height of the box body 1 is 15 mm.

[0031] The photovoltaic junction box of the embodiment further comprises a cable 4 and a cable clamp 6. One end of the box body 1 is provided with a crimping opening 12. The two sides of the crimping opening 12 are provided with reinforcing plates 13. The terminal piece 3 is provided with a crimping part 33 which is matched with the position of the crimping opening 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 a cable clamp groove and extends out of the box body 1. The cable clamp 6 is fixedly connected in the cable clamp groove by ultrasonic welding so as to limit the cable 4. The cable 4 is a flat cable. The top of the cable clamp groove of the box body 1 is provided with four recesses 15.

[0032] In the installation process of the photovoltaic junction box of the embodiment, the rectangular notch 31 of the terminal sheet 3 is clamped and fixed with the limiting protrusion 111, the limiting column is clamped and fixed with the limiting mouth of the terminal sheet, the terminal sheet is fixed in the box body through self hot melting, thereby realizing the quick positioning and installation of the terminal sheet 3 on the limiting protrusion 11, the diode 5 between the two terminal sheets 3 is clamped and fixed with the slope surface 112 arranged on the side of the limiting protrusion 11 which is close to each other, the bottom of the diode 5 is abutted with the slope surface 112, and the quick installation is formed.

[0033] Embodiment 2, see Figure 6 The photovoltaic junction box of the embodiment has the same remaining parts as those of the embodiment 1, and the difference is that the cable 4 is not arranged, and the handle 18 is arranged on one side of the box body 1.

[0034] Obviously, the above embodiments are only examples for clearly illustrating the embodiments of the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The changes or modifications which are extended from the spirit of the present application are still within the protection scope of the present application.

Claims

1. A photovoltaic junction box comprising a box body (1), a box cover (2), a terminal sheet (3) and a diode (5), the box cover (2) being detachably fixed on the top of the box body (1), and the terminal sheet (3) being fixed in the box body (1), characterized in that, The terminal sheet (3) is provided with two pieces and is arranged in the box body (1) along the length direction of the box body (1), the diode (5) is arranged between the two pieces of terminal sheet (3) and is connected with the two pieces of terminal sheet (3) respectively, the bottom of the box body (1) is provided with two limiting bosses (11) which are arranged symmetrically along the length direction of the box body (1), and the two sides of the limiting boss (11) are provided with limiting lugs (111); the two sides of the terminal sheet (3) are provided with rectangular notches (31), the shape and size of the rectangular notch (31) are matched with the limiting lug (111), the top of the limiting boss (11) is abutted with the bottom of the terminal sheet (3), and the limiting lug (111) is inserted and matched with the rectangular notch (31) of the terminal sheet (3).

2. A photovoltaic junction box according to claim 1, characterized in that The end, which is close to each other, of the two limiting bosses (11) is provided with a slope (112), the slope (112) extends from the limiting boss (11) to the bottom of the box body (1), and the bottom of the diode (5) is abutted with the two slopes (112).

3. A photovoltaic junction box according to claim 2, wherein The end, which is close to the diode (5), of the terminal sheet (3) is provided with a bus bar through slot (34), and the limiting boss (11) is provided with a bus bar through hole (113) which is matched with the position and size of the bus bar through slot (34).

4. A photovoltaic junction box according to claim 1, wherein The two sides of the end, which is far away from each other, of the two limiting bosses (11) are provided with limiting columns (114), and the terminal sheet (3) is provided with terminal sheet limiting openings (35) which are matched with the shape and size of the limiting column (114), the limiting column (114) passes through the corresponding terminal sheet limiting opening (35) and fixes the terminal sheet (3) in the box body (1) by heat melting or cold pressing.

5. A photovoltaic junction box according to claim 1, wherein The terminal sheet (3) is provided with a soldering groove (32).

6. A photovoltaic junction box according to any one of claims 1 to 5, characterized in that The box cover (2) is embedded in the top of the box body (1), the two ends of the box cover (2) along the length direction are provided with clamping openings (21), the inner walls of the two ends of the box body (1) along the length direction are provided with clamping protrusions (16) which are matched with the clamping openings (21), one side of the top of the box body (1) is provided with two trapezoidal notches (17), and when the box cover (2) is clamped and fixed with the box body (1), the side edge of the box cover (2) is attached with the inner wall of the box body (1).

7. A photovoltaic junction box according to any one of claims 1 to 5, characterized in that The length of the box body (1) is 70mm to 75mm, the width of the box body (1) is 22mm to 27mm, and the height of the box body (1) is 11mm to 15mm.

8. A photovoltaic junction box according to any one of claims 1 to 5, characterized in that It also includes a cable (4) and a cable clamp (6), one end of the box body (1) is provided with a crimping opening (12), the two sides of the crimping opening (12) are provided with reinforcing plates (13), the terminal sheet (3) is provided with a crimping part (33) which is matched with the position of the crimping opening (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 cable clamp slot and extends out of the box body (1), the cable clamp (6) is fixedly connected in the cable clamp slot by ultrasonic welding so as to limit the cable (4), and the cable (4) is a flat cable.

9. A photovoltaic junction box according to claim 8, characterized in that The top of the cable clamp slot of the box body (1) is provided with four recesses (15).

10. A photovoltaic junction box according to any one of claims 1 to 5, characterized in that One side of the box body (1) is provided with a handle (18).

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