Photovoltaic junction box with bus bars connected in multiple directions

Abstract

The utility model discloses a photovoltaic junction box with bus bars connected in multiple directions, which comprises a box body, a box cover terminal piece and a diode, the box cover is detachably fixed at the top of the box body, the terminal piece comprises a first terminal piece and a second terminal piece, the first terminal piece comprises a main body part, an extension part and a connecting part, and the extension part is connected with the diode. The main body part, the second terminal piece and the connecting part are sequentially arranged in the box body at intervals in the length direction of the box body, the main body part is connected with the connecting part through the extending part, the diode is arranged in the length direction of the box body, and the packaging part of the diode is arranged between the main body part and the second terminal piece. Two pins of the diode are respectively welded and fixed on the main body part and the second terminal sheet, the connecting part is provided with a first bus bar through groove, the second terminal sheet is provided with a second bus bar through groove, and the first bus bar through groove and the second bus bar through groove are L-shaped and are symmetrically arranged. And the heat dissipation performance is excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of photovoltaic junction box of busbar multidirectional connection, 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 users. Double-glass solar cell module is composed of two layers of glass on the front and back surfaces and solar cell pieces in the middle of the glass layers. The insulation of glass is better than that of backsheet, and double-glass module can meet higher system voltage and has obvious wear resistance advantage, which is suitable for photovoltaic power stations in areas with more acid rain or salt fog. Due to its different structure from backsheet solar cell module, a split junction box is generally used.

[0003] Chinese patent document CN218998016U discloses a photovoltaic junction box, comprising a diode, a positive metal sheet and a negative metal sheet, the positive metal sheet and the negative metal sheet are arranged on both sides of the diode, the diode is conductively connected to the positive metal sheet and the negative metal sheet respectively, and the diode is in surface contact with the positive metal sheet and the negative metal sheet respectively. The structure of the patent is complex, the heat dissipation performance is low, and the terminal is inconvenient to install. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a photovoltaic junction box of busbar multidirectional connection with various installation methods and excellent heat dissipation performance.

[0005] The utility model provides a technical scheme for solving the above technical problem, which is a photovoltaic junction box of busbar multidirectional connection, comprising a box body, a box cover terminal sheet, and a diode. The box cover is detachably fixed on the top of the box body. The terminal sheet includes a first terminal sheet and a second terminal sheet. The first terminal sheet includes a main body part, an extension part, and a connecting part. The main body part, the second terminal sheet, and the connecting part are sequentially and spacedly arranged in the box body along the length direction of the box body. The main body part is connected to the connecting part through the extension part. The diode is arranged along the length direction of the box body. The packaging part of the diode is arranged between the main body part and the second terminal sheet. Two pins of the diode are respectively welded and fixed on the main body part and the second terminal sheet. The connecting part is provided with a first busbar through slot. The second terminal sheet is provided with a second busbar through slot. The first busbar through slot and the second busbar through slot are both L-shaped and symmetrically arranged.

[0006] Preferably, the edge of the lid has a downwardly extending protrusion, and both sides of the box body have box body protrusions. The bottom of the protrusion is connected to two downwardly extending and symmetrically arranged hanging ears. The hanging ears have a locking interface that engages with the box body protrusions. The inner side of the hanging ears has a wedge-shaped groove located directly below the locking interface. When the lid is closed on the box body, the top of the box body extends into the protrusion, the hanging ears fit against the outer side of the box body's side wall, and the box body protrusions engage with the locking interface.

[0007] Preferably, the bottom of the housing is provided with a stop and a limiting protrusion. The stop is located between the first terminal piece and the second terminal piece. The stop includes an L-shaped stop and a long strip stop. The limiting protrusion is located between the L-shaped stop and the long strip stop. The second terminal piece is provided with a rectangular notch on the side near the extension. The limiting protrusion is located within the rectangular notch.

[0008] Preferably, the bottom of the box body is provided with a vertically arranged limiting post, which passes through the first terminal piece and the second terminal piece respectively and fixes the first terminal piece and the second terminal piece in the box body by its own heat melting or cold pressing.

[0009] Preferably, one side of the first terminal piece has a folded edge perpendicular to the first terminal piece.

[0010] Preferably, the bottom of the box is provided with a plurality of pads, the height of which is 0.5mm to 1mm.

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

[0012] Preferably, at least two of the limiting posts pass through the main body, at least two of the limiting posts pass through the connecting part, and at least two of the limiting posts pass through the second terminal piece.

[0013] Preferably, the device also includes a cable and a cable clip. One end of the housing is provided with a crimping interface, and reinforcing plates are provided on both sides of the crimping interface. The first 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 clip groove. The cable clip is fixedly connected in the cable clip groove by ultrasonic welding to limit the cable. The cable is a flat cable, and four recesses are provided on the top of the cable clip groove of the housing.

[0014] Preferably, a handle is provided on one side of the outer shell of the box.

[0015] This utility model has positive effects:

[0016] (1) The two terminal sheets of the photovoltaic junction box with multi-directional bus bar connection of the utility model are arranged along the length direction of the box body, the first terminal sheet comprises a main body part, an extension part and a connecting part, the main body part and the connecting part are connected through the extension part, the diode is arranged between the second terminal sheet and the main body part along the length direction of the box body, the diode is arranged in bias, so that the area of the box body becomes narrower, and the area of the connecting part of the second terminal sheet and the first terminal sheet is larger, an L-shaped bus bar through groove can be arranged, the installation requirements of various bus bar arrangement modes can be met, the space design is ingenious, the applicability is high, the heat dissipation area of the terminal sheet is increased to the maximum, and the heat dissipation effect is good.

[0017] (2) The box body of the photovoltaic junction box with multi-directional bus bar connection of the utility model is provided with box body protrusions on the two sides of the outer wall, and the box cover hanging lug part is provided with a detachable fixed connection of a clamping port, so that the box body and the box cover can be quickly fixed through clamping, and the installation efficiency is improved.

[0018] (3) The box body base of the photovoltaic junction box with multi-directional bus bar connection of the utility model is provided with a limiting column and a limiting protrusion, the second terminal sheet is matched with a rectangular shape through the limiting protrusion, and the terminal sheet and the heat dissipation sheet are fixed through the limiting column itself hot melting, a stop part is arranged between the two terminal sheets arranged along the length direction of the box body, the L-shaped stop block and the long strip-shaped stop block abut against the terminal sheets on the two sides, the space design is ingenious, the stability of diode installation is ensured, the internal space is increased to the maximum, and the heat dissipation effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The photovoltaic junction box with multi-directional bus bar connection of the utility model will be further described below with reference to the drawings.

[0020] Figure 1 It is a structure schematic view of the photovoltaic junction box with multi-directional bus bar connection of example 1.

[0021] Figure 2 It is an installation structure schematic view of the photovoltaic junction box with multi-directional bus bar connection of example 1.

[0022] Figure 3 It is a box body structure schematic view of the photovoltaic junction box with multi-directional bus bar connection of example 1.

[0023] Figure 4 It is Figure 3 Another perspective structure schematic view.

[0024] Figure 5 It is a terminal structure schematic view of the photovoltaic junction box with multi-directional bus bar connection of example 1.

[0025] Figure 6 It is a box cover structure schematic view of the photovoltaic junction box with multi-directional bus bar connection of example 1.

[0026] Figure 7 Structure diagram of the photovoltaic junction box with multi-directional connection of bus bars of Example 2.

[0027] The above reference signs are as follows:

[0028] Box body 1, recess 11, box body protrusion 12, stop 13, L-shaped stop 131, long strip-shaped stop 132, limiting protrusion 14, limiting column 15, crimping port 16, reinforcing plate 17, handle 18, box cover 2, ear portion 21, clamping port 211, wedge-shaped groove 212, protrusion portion 22, terminal sheet 3, first terminal sheet 31, main body portion 311, extension portion 312, connecting portion 313, crimping portion 314, folded edge 315, second terminal sheet 32, rectangular notch 321, first bus bar through slot 33, second bus bar through slot 34, cable 4, diode 5, arc-shaped notch 51, pad 6, wire clamp 7. DETAILED DESCRIPTION

[0029] Example 1

[0030] See Figures 1 to 5 The photovoltaic junction box with multi-directional connection of bus bars of the present embodiment comprises a box body 1, a box cover 2, a terminal sheet 3, and a diode 5. The box cover 2 is detachably fixed on the top of the box body 1. The terminal sheet 3 comprises a first terminal sheet 31 and a second terminal sheet 32. The first terminal sheet 31 comprises a main body portion 311, an extension portion 312, and a connecting portion 313. The main body portion 311, the second terminal sheet 32, and the connecting portion 313 are sequentially and spacedly arranged in the box body 1 along the length direction of the box body 1. The main body portion 311 is connected to the extension portion 312 and the connecting portion 313. The diode 5 is arranged along the length direction of the box body 1. The packaging portion of the diode 5 is arranged between the main body portion 311 and the second terminal sheet 32. Two pins of the diode 5 are respectively welded and fixed on the main body portion 311 and the second terminal sheet 32. The connecting portion 313 is provided with a first bus bar through slot 33. The second terminal sheet 32 is provided with a second bus bar through slot 34. The first bus bar through slot 33 and the second bus bar through slot 34 are both L-shaped and symmetrically arranged. One side of the first terminal sheet 31 is provided with a folded edge 315 perpendicular to the first terminal sheet 31.

[0031] The edge of the box cover 2 is provided with a ring of protrusion portions 22 extending downward. The outer sides of the two side walls of the box body 1 are both provided with box body protrusions 12. The bottom of each protrusion portion 22 is connected to two ear portions 21 extending downward and symmetrically arranged. The ear portions 21 are provided with clamping ports 211 clampingly matched with the box body protrusions 12. The inner side of each ear portion 21 is provided with a wedge-shaped groove 212 located directly below the clamping port 211. When the box cover 2 is covered on the box body 1, the top of the box body 1 extends into the protrusion portion 22. The ear portion 21 is attached to the outer side of the side wall of the box body 1. The box body protrusion 12 is clamped in the clamping port 211.

[0032] The bottom of the box body 1 is provided with a stop portion 13 and a limiting protrusion 14, the stop portion 13 is located between the first terminal sheet 31 and the second terminal sheet 32, the stop portion 13 comprises an L-shaped stop block 131 and a long strip-shaped stop block 132, the limiting protrusion 14 is located between the L-shaped stop block 131 and the long strip-shaped stop block 132, one side of the second terminal sheet 32 close to the extension portion 312 is provided with a rectangular notch 321, and the limiting protrusion 14 is located in the rectangular notch 321. The bottom of the box body 1 is provided with limiting columns 15 arranged in the vertical direction, the limiting columns 15 pass through the first terminal sheet 31 and the second terminal sheet 32 respectively, and the first terminal sheet 31 and the second terminal sheet 32 are fixed in the box body 1 by being hot-melted or cold-pressed by the limiting columns 15.

[0033] The photovoltaic junction box with the bus bar multi-directional connection of the embodiment further comprises a cable 4 and a wire clamp 7, one end of the box body 1 is provided with a crimping port 16, both sides of the crimping port 16 are provided with reinforcing plates 17, the first terminal sheet 31 is provided with a crimping portion 314 corresponding to the position of the crimping port 16, one end of the cable 4 is crimped and fixed in the crimping portion 314, the other end of the cable 4 extends out of the box body 1 through a wire clamp slot, and the wire clamp 7 is fixedly connected in the wire clamp slot by ultrasonic welding so as to limit the cable 4, and the cable 4 is a flat cable. Four recessed portions 11 are formed in the top of the wire clamp slot of the box body 1.

[0034] The bottom of the box body 1 is provided with a plurality of pads, and the height of the pad is 0.5 mm.

[0035] The length of the box body 1 is 70 mm, the width of the box body 1 is 22 mm, and the height of the box body 1 is 11 mm.

[0036] Two of the limiting columns 15 extend upwards through the main body portion 311 from the bottom of the box body 1, two of the limiting columns 15 extend upwards through the connecting portion 313 from the bottom of the box body 1, and two of the limiting columns 15 extend upwards through the second terminal sheet 32 from the bottom of the box body 1.

[0037] Embodiment 2

[0038] See Figure 6 The photovoltaic junction box with the bus bar multi-directional connection of the embodiment has the same remaining parts as those of Embodiment 1, and the difference lies in that there is no cable 4, and one side of the box body 1 is provided with a handle 18.

[0039] Obviously, the above implementation is only an example for clearly illustrating the embodiments of the utility model, and is not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations extended from the spirit of the utility model still fall within the protection scope of the utility model.

Claims

1. A multi-directional busbar connecting photovoltaic junction box, comprising a box body (1), a box cover (2), a terminal sheet (3), and a diode (5), the box cover (2) is detachably fixed on the top of the box body (1), characterized in that, The terminal sheet (3) comprises a first terminal sheet (31) and a second terminal sheet (32), the first terminal sheet (31) comprises a main body part (311), an extension part (312) and a connecting part (313), the main body part (311), the second terminal sheet (32) and the connecting part (313) are sequentially and spacedly arranged in the box body (1) along the length direction of the box body (1), the main body part (311) is connected through the extension part (312) and the connecting part (313), the diode (5) is arranged along the length direction of the box body (1), the packaging part of the diode (5) is arranged between the main body part (311) and the second terminal sheet (32), two pins of the diode (5) are respectively welded and fixed on the main body part (311) and the second terminal sheet (32), the connecting part (313) is provided with a first bus bar through slot (33), the second terminal sheet (32) is provided with a second bus bar through slot (34), and the first bus bar through slot (33) and the second bus bar through slot (34) are both L-shaped and symmetrically arranged.

2. The PV junction box with multi-directional busbar connection according to claim 1, wherein, The edge of the box cover (2) is provided with a ring-shaped downward extending protruding part (22), the two side walls of the box body (1) are both provided with a box body protruding block (12), the bottom of the protruding part (22) is connected with two downward extending and mutually symmetrically arranged hanging ear parts (21), the hanging ear part (21) is provided with a clamping port (211) matched with the box body protruding block (12), and the inner side of the hanging ear part (21) is provided with a wedge-shaped slot (212) located directly below the clamping port (211); when the box cover (2) is covered on the box body (1), the top of the box body (1) is inserted into the protruding part (22), the hanging ear part (21) is attached to the outer side of the side wall of the box body (1), and the box body protruding block (12) is clamped in the clamping port (211).

3. The multi-directional busbar connected photovoltaic junction box of claim 2, wherein, The bottom of the box body (1) is provided with a stop part (13) and a limiting protrusion (14), the stop part (13) is located between the first terminal sheet (31) and the second terminal sheet (32), the stop part (13) comprises an L-shaped stop block (131) and a long strip-shaped stop block (132), the limiting protrusion (14) is located between the L-shaped stop block (131) and the long strip-shaped stop block (132), and the side of the second terminal sheet (32) close to the extension part (312) is provided with a rectangular notch (321), and the limiting protrusion (14) is located in the rectangular notch (321).

4. The PV junction box of claim 1, wherein, The bottom of the box body (1) is provided with a limiting column (15) arranged in the vertical direction, the limiting column (15) penetrates through the first terminal sheet (31) and the second terminal sheet (32) and fixes the first terminal sheet (31) and the second terminal sheet (32) in the box body (1) by self hot melting or cold pressing.

5. The photovoltaic junction box with multi-directional busbar connection according to claim 1, characterized in that, One side of the first terminal sheet (31) is provided with a folding edge (315) perpendicular to the first terminal sheet (31).

6. The PV junction box of claim 1, wherein the busbar multidirectional connection is a busbar multidirectional connection of claim 2, 3, 4 or 5. The bottom of the box body (1) is provided with a plurality of cushion blocks (6), and the height of the cushion block (6) is 0.5mm-1mm.

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

8. The PV junction box of claim 4, wherein, At least two of the limiting columns (15) pass through the main body part (311), at least two of the limiting columns (15) pass through the connecting part (313), and at least two of the limiting columns (15) pass through the second terminal sheet (32).

9. The PV junction box of claim 1 to 5, wherein, Further comprising a cable (4) and a wire clamp (7), one end of the box body (1) is provided with a crimping port (16), both sides of the crimping port (16) are provided with reinforcing plates (17), the first terminal sheet (31) is provided with a crimping part (314) corresponding to the position of the crimping port (16), one end of the cable (4) is crimped and fixed in the crimping part (314), the other end of the cable (4) passes through the wire clamp slot and extends out of the box body (1), the wire clamp (7) is fixedly connected in the wire clamp slot by ultrasonic welding so as to limit the cable (4), the cable (4) is a flat cable, and four recessed parts (11) are formed in the top of the wire clamp slot of the box body (1).

10. The PV junction box of claim 1 to 5, wherein, One side of the box body (1) is provided with a handle (18).

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