Junction box and photovoltaic module

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a junction box and a photovoltaic assembly. The junction box comprises a base, a stop block and a terminal piece. Wherein the base is provided with a containing cavity, a check block is arranged in the containing cavity, and a first clamping part is arranged on the check block. The terminal piece comprises a body, the body is provided with a second clamping part, and the second clamping part is connected with the first clamping part in a clamping mode so that the terminal piece can be assembled in the containing cavity. The stop block is arranged in the base, the first clamping part is arranged on the stop block, and then the second clamping part is connected with the first clamping part in a clamping manner, so that stable connection between the terminal piece and the stop block is realized, and the terminal piece can be assembled in the accommodating cavity. According to the junction box, the base and the terminal sheet are assembled without adopting a cold riveting or hot riveting mode in the traditional technology, and equipment such as a punching machine or a heating plate is not needed, so that the manufacturing cost of the junction box is saved, and meanwhile, the manufacturing and assembling safety of the junction box can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a junction box and a photovoltaic component. Background Art

[0002] The junction box in the photovoltaic module is a device used to electrically connect the battery cells in the photovoltaic module with the external power conversion system. The junction box of the photovoltaic module is usually composed of components such as a plastic shell, a terminal piece, a wiring harness and a diode. In the prior art, the assembly of the plastic shell and the terminal piece needs to be carried out by hot riveting or cold riveting. When the cold riveting process is adopted, the operator sets a positioning column at a specific position of the plastic shell, and then uses a punch to impact the positioning column to deform the positioning column, and the deformed positioning column and the terminal piece interfere with each other to complete the assembly process of the two; when the hot riveting process is adopted, the operator also sets a positioning column at a specific position of the plastic shell, and then heats the positioning column through a heating plate and applies a certain force to squeeze it, so that the positioning column is deformed, and the deformed positioning column and the terminal piece interfere with each other to complete the assembly process of the two.

[0003] However, the above process requires a larger tonnage punch or heating plate, which undoubtedly increases the production cost. At the same time, there are certain safety hazards when the above cold riveting process or hot riveting process is used to assemble the plastic housing and the terminal piece.

[0004] Therefore, it is urgent to design a junction box and a photovoltaic module to solve the above technical problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a junction box, which has low production cost and high safety performance during the production of the junction box.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a junction box, comprising:

[0008] A base, wherein the base has a receiving chamber, a stopper is arranged in the receiving chamber, and a first clamping portion is arranged on the stopper;

[0009] The terminal piece is arranged in the accommodating chamber, and the terminal piece includes a body, and the body is provided with a second clamping portion, and the second clamping portion is clamped and connected with the first clamping portion.

[0010] As an optional technical solution for a junction box, the second clamping portion includes a clamping hole, which is arranged on the main body, and the first clamping portion includes a buckle, which is arranged on the stopper, and the stopper passes through the clamping hole, and the buckle passes through the clamping hole and is stopped on the surface of the main body.

[0011] As an optional technical solution for a junction box, the second clamping portion includes a folded edge formed at two opposite edges of the main body, the clamping hole is located at the connection between the main body and the folded edge, and the clamping hole has a supporting wall, and the buckle is stopped on the supporting wall.

[0012] As an optional technical solution for a junction box, the buckle has a first inclined surface, the folded edge has a second inclined surface, the angle between the second inclined surface and the body is an obtuse angle, and the first inclined surface can abut against the second inclined surface when the buckle passes through the clamping hole.

[0013] As an optional technical solution for a junction box, the angle is greater than 90°.

[0014] As an optional technical solution of a junction box, the folded edge is elastically connected to the body.

[0015] As an optional technical solution for a junction box, the block is provided in plurality, with each two block forming a group and arranged opposite to each other, and each block is provided with at least one buckle protruding from a side surface close to the inner wall of the accommodating chamber.

[0016] As an optional technical solution for a junction box, a welding area is provided on the terminal piece, the clamping holes are provided on opposite sides of the welding area, and one end of the stopper passing through the clamping hole is arranged higher than the terminal piece.

[0017] As an optional technical solution of a junction box, the junction box includes a diode, the terminal pieces are provided in at least two, and two ends of the diode are respectively conductively connected to two adjacent terminal pieces.

[0018] The second object of the utility model is to provide a photovoltaic assembly, which includes the above-mentioned junction box. Therefore, the production cost of the photovoltaic assembly is low, and the production safety of the photovoltaic assembly is high.

[0019] To achieve this purpose, the utility model adopts the following technical solutions:

[0020] The utility model provides a photovoltaic assembly, comprising a panel and the above-mentioned junction box, wherein a terminal piece in the junction box is conductively connected to a bus bar in the panel.

[0021] The beneficial effects of the utility model include at least:

[0022] The utility model provides a junction box, which includes a base, a block and a terminal piece. The base has a receiving chamber, a block is arranged in the receiving chamber, and a first clamping portion is arranged on the block. The terminal piece is arranged in the receiving chamber, and the terminal piece includes a body, a second clamping portion is arranged on the body, and the second clamping portion is clamped and connected with the first clamping portion, so that the terminal piece is assembled into the receiving chamber. By arranging a block in the base, a first clamping portion is arranged on the block, and then the second clamping portion is clamped and connected with the first clamping portion, a stable connection between the terminal piece and the block is achieved, so that the terminal piece can be assembled into the receiving chamber. There is no need to assemble the base and the terminal piece by cold riveting or hot riveting in the traditional technology, and there is no need for equipment such as a punching machine or a heating plate, thereby saving the manufacturing cost of the junction box and improving the safety of the manufacturing and assembly of the junction box.

[0023] The utility model also provides a photovoltaic assembly, which includes the above-mentioned junction box. Therefore, the production cost of the photovoltaic assembly is low, and the production safety of the photovoltaic assembly is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a junction box provided by an embodiment of the utility model;

[0026] Figure 2 An exploded view of a junction box (without showing the upper cover) provided by an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the structure of the base and the terminal piece after assembly provided by the embodiment of the utility model;

[0028] Figure 4 for Figure 3 A local enlarged view of point C in FIG.

[0029] Figure 5 A top view of a junction box provided by an embodiment of the utility model;

[0030] Figure 6 for Figure 5 The cross-sectional view along the AA direction;

[0031] Figure 7 for Figure 6 A partial enlarged view of point D in the middle;

[0032] Figure 8 for Figure 5 The cross-sectional view along the BB direction;

[0033] Fig. 9 for Figure 8 A partial enlarged view of point E in the middle;

[0034] Fig.10 A cross-sectional view of the initial stage of assembly of the terminal piece and the base provided by the embodiment of the utility model;

[0035] Fig.11 for Fig.10 A partial enlarged view of the F in the middle;

[0036] Fig.12 A cross-sectional view of the intermediate stage of assembly of the terminal piece and the base provided by the embodiment of the utility model;

[0037] Fig.13 for Fig.12 A partial enlarged view of the G in the middle;

[0038] Fig.14 A cross-sectional view of the final stage of assembly of the terminal piece and the base provided by the embodiment of the utility model;

[0039] Fig.15 for Fig.14 A partial enlarged view of point H in the middle.

[0040] Reference numerals

[0041] 10. First clamping part; 20. Second clamping part; 100. Base; 110. Accommodating chamber; 200. Stopper; 210. Buckle; 300. Terminal piece; 310. Main body; 320. Folding edge; 330. Clamping hole; 3301. Support wall; 340. Welding area; 400. Diode; 500. Upper cover. DETAILED DESCRIPTION

[0042] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] In the description of this embodiment, unless otherwise specified, the term "plurality" refers to a quantity of two or more than two.

[0047] This embodiment provides a junction box, which has low manufacturing cost and high safety performance during manufacturing of the junction box.

[0048] like Figure 1-Figure 4 As shown, the junction box mainly includes a base 100, a stopper 200 and a terminal piece 300. The base 100 has a receiving chamber 110, the stopper 200 is arranged in the receiving chamber 110, and the first clamping portion 10 is arranged on the stopper 200. The terminal piece 300 is arranged in the receiving chamber 110, and the terminal piece 300 includes a body 310, and the body 310 is provided with a second clamping portion 20, and the second clamping portion 20 is clamped and connected with the first clamping portion 10, so that the terminal piece 300 is assembled into the receiving chamber 110.

[0049] Based on the above design, in this embodiment, a stopper 200 is provided in the base 100, a first clamping portion 10 is provided on the stopper 200, and then the second clamping portion 20 is clamped and connected with the first clamping portion 10, so that the terminal piece 300 is firmly connected with the stopper 200, and the terminal piece 300 can be assembled into the accommodating chamber 110. There is no need to assemble the base 100 and the terminal piece 300 by cold riveting or hot riveting in the traditional technology, thereby saving the manufacturing cost of the junction box and improving the safety of the manufacturing and assembly of the junction box.

[0050] Furthermore, the second clamping portion 20 in this embodiment is bent and extended toward the direction close to the stopper 200, so as to facilitate the clamping connection between the terminal piece 300 and the stopper 200, improve the assembly efficiency of the terminal piece 300 and the base 100, and save costs.

[0051] Specifically, if Figure 2 , Figure 5-Figure 9 As shown, in this embodiment, the first clamping portion 10 includes a clamping buckle 210, the second clamping portion 20 includes a folding edge 320, a clamping hole 330 is provided on the terminal piece 300, the clamping buckle 210 is arranged on the stopper 200, the stopper 200 is penetrated with the clamping hole 330, the clamping buckle 210 passes through the clamping hole 330 and is stopped on the surface of the body 310. Two folding edges 320 are bent and formed at two opposite edges of the body 310. In other words, the clamping buckle 210 can pass through the clamping hole 330 and be clamped and connected with the clamping hole 330, and the clamping hole 330 is configured to form an interference stop for the clamping buckle 210. Specifically, the card hole 330 in this embodiment is located at the connection between the main body 310 and the folded edge 320, and the card hole 330 has a support wall 3301, and the buckle 210 is snap-connected with the support wall 3301 so that the support wall 3301 forms an interference stop for the buckle 210. In this way, when the assembly process of the terminal piece 300 and the base 100 is completed, the buckle 210 passes through the card hole 330 on the terminal piece 300 and is snap-connected with the support wall 3301 of the card hole 330, so that the support wall 3301 can clamp the buckle 210, thereby avoiding the risk of the terminal piece 300 falling off due to vibration during the later use of the junction box, thereby improving the reliability and stability of the assembly of the terminal piece 300 and the base 100.

[0052] like Figure 2 , Figure 10-11As shown, in this embodiment, two folding edges 320 are arranged opposite to each other, and the two folding edges 320 are respectively located on opposite sides of the body 310. The two folding edges 320 extend in a direction away from the body 310, and the angle between the folding edge 320 and the body 310 is an obtuse angle. In this way, at the beginning of the assembly of the terminal piece 300 and the stopper 200 on the base 100, the folding edge 320 can avoid the buckle 210 on the stopper 200, avoiding the risk of the buckle 210 being scraped off due to the interference between the folding edge 320 and the buckle 210, thereby protecting the product and improving the product integrity.

[0053] Exemplarily, the angle between the folded edge 320 and the main body 310 in this embodiment is greater than 90°. Exemplarily, the angle can be set to 100° to 120°, for example, it can be set to 100°, 105°, 110°, 120° and other angle values.

[0054] Specifically, the buckle 210 in this embodiment has a first inclined surface, and the folded edge 320 has a second inclined surface. The angle between the second inclined surface and the main body 310 is an obtuse angle. During the process of the buckle 210 and the folded edge 320 being engaged (that is, in the middle stage of assembling the terminal piece 300 and the base 100), the first inclined surface can abut against the second inclined surface, thereby improving the convenience of assembling the terminal piece 300 and the base 100 and improving the assembly efficiency.

[0055] The folded edge 320 in this embodiment is elastically connected to the body 310. Optionally, the folded edge 320 in this embodiment can be set as a thin copper sheet with elasticity, such as Figure 12-13 As shown, in the middle stage of assembling the terminal piece 300 and the block 200 on the base 100, the folded edge 320 interferes with the buckle 210, that is, the buckle 210 squeezes the folded edge 320, causing the folded edge 320 to undergo elastic deformation, which is beneficial to the assembly of the terminal piece 300.

[0056] like Figure 14-15 As shown, at the final stage of assembling the terminal piece 300 and the stopper 200 on the base 100, the buckle 210 passes through the clamping hole 330 on the terminal piece 300, and then is clamped and connected with the supporting wall 3301 on the clamping hole 330. At this time, the folded edge 320 on the terminal piece 300 undergoes elastic deformation recovery, so that the supporting wall 3301 can form an interference stop for the buckle 210, thereby avoiding the risk of the terminal piece 300 falling off due to vibration during the use of the junction box in the later stage. At this point, the assembly process of the terminal piece 300 and the base 100 is completed.

[0057] Optionally, the block 200 in this embodiment is provided in plurality, and every two block 200 form a group and are arranged opposite each other. Each block 200 is provided with at least one buckle 210 protruding from a side surface close to the inner wall of the accommodating chamber 110, thereby improving the reliability and stability of the assembly of the block 200 between the terminal piece 300 and the base 100, and avoiding the terminal piece 300 from shaking and becoming unstable.

[0058] Exemplarily, the number of the blocking blocks 200 in this embodiment may be four, and one or two equal number of buckles 210 may be provided on each blocking block 200 .

[0059] The setting of the stopper 200 in this embodiment can not only be connected with the terminal piece 300 by snapping, so as to realize the assembly function of the terminal piece 300 and the base 100; in addition, Figure 3 As shown, in this embodiment, a welding area 340 is provided on the terminal piece 300, and a clamping hole 330 is provided on both opposite sides of the welding area 340, and one end of the stopper 200 through which the clamping hole 330 is provided is higher than the terminal piece 300. When the bus bar on the panel is welded with the terminal piece 300 in the junction box, splashing metal particles are generated, and the setting of the stopper 200 can block the splashing metal particles, thereby reducing the phenomenon of metal particles burning the base 100, and improving the integrity and product yield of the product.

[0060] Optionally, the base 100 in this embodiment is an insulating member, which saves costs and can avoid safety accidents such as leakage. Exemplarily, the base 100 can be a plastic member, that is, the base 100 is made of plastic material.

[0061] like Figure 2-Figure 3 As shown, the junction box in this embodiment also includes a diode 400, and the terminal pieces 300 are provided as at least two, and the two ends of the diode 400 are respectively conductively connected to two adjacent terminal pieces 300. The provision of the diode 400 can prevent the occurrence of reverse current and extend the service life of the photovoltaic module. At the same time, when an abnormal phenomenon such as overvoltage or overcurrent occurs in the photovoltaic module, the diode 400 can detect and cut off the circuit in time to prevent the photovoltaic module from being damaged.

[0062] like Figure 1 As shown, the junction box in this embodiment also includes an upper cover 500, which is snap-fitted with the base 100, so that the upper cover 500 can cover and seal the accommodating chamber 110, thereby improving the sealing performance of the junction box and preventing external dust or foreign matter from entering the accommodating chamber 110 and contaminating the junction box.

[0063] This embodiment also provides a photovoltaic module, which includes a panel and the above-mentioned junction box, and the terminal piece 300 in the junction box is conductively connected to the bus bar in the panel, so that the current of the battery cell in the panel can be extracted. It should be noted that the panel in this embodiment is a conventional component in the photovoltaic field, and its specific structure is not repeated here.

[0064] Since the photovoltaic component has the junction box, the production cost of the photovoltaic component is low and the production safety of the photovoltaic component is high.

[0065] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0066] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A junction box, characterized in that: include: A base (100), the base (100) having a receiving chamber (110), a stopper (200) being arranged in the receiving chamber (110), and a first clamping portion (10) being arranged on the stopper (200); The terminal piece (300) is arranged in the accommodating chamber (110), and the terminal piece (300) comprises a body (310). The body (310) is provided with a second clamping portion (20), and the second clamping portion (20) is clamped and connected with the first clamping portion (10).

2. The junction box according to claim 1, characterized in that: The second clamping portion (20) comprises a clamping hole (330), and the clamping hole (330) is arranged on the main body (310). The first clamping portion (10) comprises a buckle (210), and the buckle (210) is arranged on the stopper (200). The stopper (200) passes through the clamping hole (330), and the buckle (210) passes through the clamping hole (330) and is stopped on the surface of the main body (310).

3. The junction box according to claim 2, characterized in that: The second clamping portion (20) also includes a folded edge (320) formed by bending at two opposite edges of the main body (310), the clamping hole (330) is located at the connection between the main body (310) and the folded edge (320), and the clamping hole (330) has a supporting wall (3301), and the buckle (210) is stopped by the supporting wall (3301).

4. The junction box according to claim 3, characterized in that: The buckle (210) has a first inclined surface, the folded edge (320) has a second inclined surface, the angle between the second inclined surface and the body (310) is an obtuse angle, and the first inclined surface can abut against the second inclined surface when the buckle (210) passes through the clamping hole (330).

5. The junction box according to claim 4, characterized in that: The angle is greater than 90°.

6. The junction box according to claim 4, characterized in that: The folded edge (320) is elastically connected to the main body (310).

7. The junction box according to claim 2, characterized in that: The stoppers (200) are arranged in plurality, with each two of the stoppers (200) forming a group and arranged opposite to each other, and each of the stoppers (200) is provided with at least one buckle (210) protruding from a side surface close to the inner wall of the accommodating chamber (110).

8. The junction box according to claim 2, characterized in that: The terminal piece (300) is provided with a welding area (340), and the clamping holes (330) are provided on two opposite sides of the welding area (340), and one end of the stopper (200) passing through the clamping hole (330) is arranged higher than the terminal piece (300).

9. The junction box according to any one of claims 1 to 8, characterized in that: The junction box comprises a diode (400), at least two of the terminal pieces (300) are provided, and two ends of the diode (400) are respectively conductively connected to two adjacent terminal pieces (300).

10. A photovoltaic module, characterized in that The invention comprises a panel and a junction box as claimed in any one of claims 1 to 9, wherein a terminal piece (300) in the junction box is conductively connected to a bus bar in the panel.

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