Photovoltaic junction box and photovoltaic module

Abstract

The utility model relates to a photovoltaic junction box and a photovoltaic module. The photovoltaic junction box comprises a box body and a welding structure. The box body is provided with an accommodating cavity; the welding structure is located in the containing cavity and connected with the box body, the welding structure is provided with a welding opening for the bus bar to be inserted, the welding structure is used for being electrically connected with an external lead, the welding structure comprises a first welding face and a second welding face which face the welding opening, and the first welding face and the second welding face are both used for arranging welding materials. In the welding process, due to the fact that welding operation can be conducted through the two welding faces, the welding operability is improved, and the welding area is increased. When the bus bar is welded, the welding can be observed from the directions of the first welding surface and the second welding surface, so that the welding firmness degree of the bus bar can be observed from multiple angles.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic modules, in particular to a photovoltaic junction box and a photovoltaic module. BACKGROUND

[0002] The photovoltaic junction box is used for connecting the bus bar on the cell and the external lead wire, and for transmitting the current generated by the cell to the external power equipment. The bus bar is connected to the corresponding position of the photovoltaic junction box by welding. At present, in the welding process, the welding interface is blocked by the bus bar, and it is impossible to observe and confirm whether the bus bar is firmly welded. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a photovoltaic junction box and a photovoltaic module in view of the problem that the welding interface is blocked by the bus bar in the welding process, and it is impossible to observe and confirm whether the bus bar is firmly welded.

[0004] In a first aspect, a photovoltaic junction box comprises:

[0005] a box body provided with a receiving cavity; and

[0006] a welding structure located in the receiving cavity and connected with the box body, the welding structure being provided with a welding port for inserting the bus bar, the welding structure being used for electrically connecting with the external lead wire, the welding structure comprising a first welding surface and a second welding surface facing the welding port, and the first welding surface and the second welding surface being used for arranging welding materials.

[0007] In one of the embodiments, the first welding surface and the second welding surface are inclined away from the welding port in a direction away from the welding port at one end close to the welding port.

[0008] In one of the embodiments, the welding structure comprises a conductive piece and an auxiliary piece located in the receiving cavity and connected with the box body, the conductive piece and the auxiliary piece being oppositely arranged to form the welding port, the conductive piece comprising the first welding surface, the auxiliary piece comprising the second welding surface, and the conductive piece being used for electrically connecting with the external lead wire.

[0009] In one of the embodiments, the conductive piece comprises a first welding portion and a lap portion connected with each other, the lap portion comprising a first part and a second part connected by bending, the first part being protruded from the bottom wall of the box body, the second part being oppositely arranged with the bottom wall, the bottom end of the first welding portion being lapped on the second part, the top end of the first welding portion being inclined away from the welding port with respect to the auxiliary piece in a direction away from the welding port, and the first welding portion comprising the first welding surface.

[0010] In one of the embodiments, the auxiliary member comprises a second welding portion and a support portion connected by a bending, the support portion is connected with the box body, the bottom end of the second welding portion is arranged on the support portion, the top end of the second welding portion is inclined relative to the support portion and away from the conductive member, and the second welding portion comprises the second welding surface.

[0011] In one of the embodiments, the photovoltaic junction box further comprises a hanging member arranged in the accommodating cavity, the hanging member is arranged on the side of the auxiliary member away from the conductive member, the hanging member comprises a third portion and a fourth portion connected with each other, the third portion is connected with the side wall of the box body, the third portion is provided with a hollow portion penetrating along the thickness direction of the box body, and the fourth portion extends away from the side wall and is connected with the support portion.

[0012] In one of the embodiments, the welding structure comprises two, the welding structures are arranged on opposite sides of the hanging member along the length direction of the box body, and the support portions of the two auxiliary members are respectively connected to the opposite sides of the fourth portion along the length direction of the box body.

[0013] In one of the embodiments, the photovoltaic junction box further comprises a diode element arranged in the accommodating cavity, and the diode element is electrically connected with the welding structure.

[0014] In one of the embodiments, the bottom wall of the box body is provided with a slot communicating with the accommodating cavity, and the slot is arranged at the bottom of the welding structure.

[0015] In the second aspect, a photovoltaic module comprises the photovoltaic junction box according to the first aspect.

[0016] The photovoltaic junction box described above is provided with a welding structure in the accommodating cavity, the welding structure is provided with a welding port for inserting the busbar as a welding position of the busbar. The welding structure comprises a first welding surface and a second welding surface facing the welding port, and the first welding surface and the second welding surface are both used for arranging welding materials. During welding, two welding surfaces can be used for welding operation, which increases the operability and welding area. When welding the busbar, the welding can be observed from the directions of the first welding surface and the second welding surface, and the welding firmness of the busbar can be observed from multiple angles. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0018] Figure 1 A structural schematic diagram of a photovoltaic junction box provided by the embodiment of the present application.

[0019] Figure 2 A structural schematic diagram of a welding structure provided by the embodiment of the present application.

[0020] Figure 3 A first schematic diagram of an internal structure of a photovoltaic junction box provided by the embodiment of the present application.

[0021] Figure 4 A side view of an internal structure of a photovoltaic junction box provided by the embodiment of the present application.

[0022] Figure 5 A second schematic diagram of an internal structure of a photovoltaic junction box provided by the embodiment of the present application.

[0023] Figure 6 A third schematic diagram of an internal structure of a photovoltaic junction box provided by the embodiment of the present application.

[0024] Figure 7 A fourth schematic diagram of an internal structure of a photovoltaic junction box provided by the embodiment of the present application.

[0025] Legend: 100, photovoltaic junction box; 1, box body; 11, accommodating cavity; 2, welding structure; 20, welding port; 21, support piece; 22, external lead wire; 23, conductive piece; 231, first welding surface; 232, first welding part; 233, lapping part; 2331, first part; 2332, second part; 24, auxiliary piece; 241, second welding surface; 242, second welding part; 243, support part; 25, welding material; 26, hanging piece; 261, third part; 2611, hollow part; 262, fourth part; 27, diode element; 271, main body; 272, positive lead wire; 273, negative lead wire; 28, slot; 29, cover piece; 291, fifth part; 292, sixth part. DETAILED DESCRIPTION

[0026] To make the above objectives, features and advantages of the present application more obvious and comprehensible, specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] The photovoltaic junction box is used for connecting the bus bar on the cell and the external lead wire, and is used for transmitting the current generated by the cell to the external power equipment. At present, the bus bar is mainly connected to the corresponding position of the photovoltaic junction box through the soldering tin welding mode. After the bus bar is inserted into the inside of the photovoltaic junction box, the bus bar is bent on the tin block, the tin block is melted and welded by heating through the electric soldering iron, the welding position is located at the bottom of the bus bar, and the welding surface is difficult to be visually observed due to being shielded by the bus bar, so that it is difficult to judge the welding firmness of the bus bar.

[0028] Based on the above problems, please refer to Figure 1 , in a first aspect, the embodiments of the present application provide a photovoltaic junction box 100. The photovoltaic junction box 100 comprises a box body 1 and a welding structure 2. The box body 1 is provided with an accommodating cavity 11, and the welding structure 2 is located in the accommodating cavity 11 and connected with the box body 1, please refer to Figure 2 , the welding structure 2 is provided with a welding port 20 for inserting the bus bar, and the welding structure 2 is used for connecting with the external lead wire 22 (please refer to Figure 1The electrical connection is achieved by welding structure 2, which includes a first welding surface 231 and a second welding surface 241 facing the welding port 20. Both the first welding surface 231 and the second welding surface 241 are used to hold welding material 25. The photovoltaic junction box 100 described above has welding structure 2 within its receiving cavity 11, and welding structure 2 has a welding port 20 for inserting a busbar. The busbar extends into welding structure 2 through welding port 20. Since the first welding surface 231 and the second welding surface 241 of welding structure 2 both face the welding port 20, the welding surfaces are located on both sides of the busbar and are no longer obstructed by the busbar. During welding, the first welding surface 231 and the second welding surface 241 can be observed from the direction facing the welding port 20. Since both the first welding surface 231 and the second welding surface 241 are used to hold welding material 25, the two sides of the busbar are welded to the first welding surface 231 and the second welding surface 241 respectively through welding material 25, thereby increasing the welding operability and welding area of ​​the busbar. When welding the busbar, the welding process can be observed from both the first welding surface 231 and the second welding surface 241. This allows for multi-angle observation of the state of the welding material 25 on both surfaces, enabling the assessment of whether the welding material 25 completely covers the busbar and whether defects such as cracks exist. This, in turn, allows for the determination of the connection quality between the busbar and the welded structure 2. If the welding material 25 is evenly distributed and free of the aforementioned defects, the busbar weld is strong; conversely, uneven distribution may indicate a weak weld.

[0029] In an optional embodiment, the solder 25 may be made of materials such as tin, silver, or copper.

[0030] In the optional implementation, please refer to Figure 1 The box 1 includes a bottom wall and side walls, with the side walls surrounding the bottom wall to form a receiving cavity 11. The box 1 has an opening communicating with the receiving cavity 11, which is formed by the side walls and the bottom wall. The photovoltaic junction box 100 also includes a cover that seals the opening. The opening is used for potting or welding operations on the box 1.

[0031] In an optional embodiment, the welding structure 2 can be disposed on the bottom wall or the side wall of the housing 1. For ease of welding, please refer to [reference needed]. Figure 2 and Figure 1 The weld joint 20 of the welded structure 2 faces the opening of the box 1, thereby making the first weld surface 231 and the second weld surface 241 face the opening of the box 1, which can further improve the observability of the weld surface.

[0032] In an optional embodiment, the first welding surface 231 and the second welding surface 241 may be arranged adjacent to or opposite to each other. In an optional embodiment, the number of the first welding surface 231 and the second welding surface 241 may include one, two, etc.

[0033] In optional embodiments, the first welding surface 231 and the second welding surface 241 can be vertically arranged along the thickness direction of the box body 1 (e.g., the Y-Y direction as shown). Figure 1 In other optional embodiments, please refer to Figure 2 In some embodiments, the first welding surface 231 and the second welding surface 241 are inclined away from the end of the welding port 20 towards the direction away from the welding port 20 at the end close to the welding port 20. In this way, the first welding surface 231 and the second welding surface 241 form a conical structure upwardly of the welding port 20, so that the first welding surface 231 and the second welding surface 241 can be exposed to a larger area of the opening of the box body 1, the line of sight obstruction can be further reduced, and the melting and flowing of the welding material 25 can be more clearly observed.

[0034] The welding structure 2 will be described below: please refer to Figure 2 In some embodiments, the welding structure 2 includes the conductive member 23 and the auxiliary member 24 located in the accommodation cavity 11 and connected with the box body 1, the conductive member 23 and the auxiliary member 24 are oppositely arranged to form the welding port 20, the conductive member 23 includes the first welding surface 231, the auxiliary member 24 includes the second welding surface 241, and the conductive member 23 is used to be electrically connected with the external lead 22. It can be understood that after the busbar is welded with the conductive member 23, the busbar can transmit the current generated by the battery piece to the external lead 22 through the conductive member 23, and then the current can be transmitted to the external power equipment. The auxiliary member 24 is used to assist the conductive member 23 to form the welding structure 2. During welding, the welding material 25 melts and flows in the space formed by the auxiliary member 24 and the conductive member 23, the auxiliary member 24 can guide the welding material 25 to better cover on the second welding surface 241, so that the distribution of the welding material 25 is more uniform.

[0035] Please refer to Figure 3 In some embodiments, the photovoltaic junction box 100 further includes a diode element 27 located in the accommodation cavity 11, and the diode element 27 is electrically connected with the welding structure 2. In the photovoltaic assembly, due to uneven illumination, local shadow or performance difference of the battery piece, etc., some battery pieces can become loads and generate reverse current. The diode element 27 has unidirectional conductivity, when reverse voltage occurs, the diode element 27 is in the cut-off state, which can protect the battery piece from the reverse current. If a certain battery piece fails (e.g., short circuit) or is completely blocked and cannot generate electricity, the current of the branch can bypass through the diode element 27, which can avoid the blocking of the faulty battery piece to the entire branch current, so that other normal battery pieces can continue to supply power to the external circuit.

[0036] In an optional embodiment, the diode element 27 includes a body 271, a positive electrode wire 272, and a negative electrode wire 273. The positive electrode wire 272 and the negative electrode wire 273 are disposed at opposite ends of the body 271 and extend in a direction away from the body 271.

[0037] In an optional embodiment, the external lead 22 includes a positive external lead and a negative external lead. The busbars on the solar cell include a positive busbar and a negative busbar.

[0038] Please see Figure 3 In an optional embodiment, the photovoltaic junction box 100 includes two welded structures 2. The conductive element 23 of one welded structure 2 is electrically connected to the positive busbar, the positive external lead, and the positive lead wire 272 of the diode element 27. The conductive element 23 of the other welded structure 2 is electrically connected to the negative busbar, the negative external lead, and the negative lead wire 273 of the diode element 27.

[0039] Please see Figure 2 In some embodiments, the conductive component 23 includes a first welded portion 232 and an overlapping portion 233 connected to each other. The overlapping portion 233 includes a first part 2331 and a second part 2332 that are bent and connected. The first part 2331 protrudes from the bottom wall of the housing 1, and the second part 2332 is disposed opposite to the bottom wall. The bottom end of the first welded portion 232 overlaps the second part 2332, and the top end of the first welded portion 232 is inclined relative to the auxiliary component 24 in a direction away from the weld joint 20. The first welded portion 232 includes a first welded surface 231. The second part 2332 is bent and connected to the first part 2331, and the second part 2332 is disposed opposite to the bottom wall of the housing 1. This increases the area of ​​the overlapping portion 233, thereby increasing the contact area between the overlapping portion 233 and the first welded portion 232, allowing the overlapping portion 233 to more stably support the first welded portion 232. The overlapping portion 233 is provided to support the first welded portion 232. Please refer to [link to relevant documentation]. Figure 5 On the other hand, it is used to abut against the positive electrode wire 272 of the diode element 27 to form an electrical connection. Since the diode element 27 is placed inside the housing 1, its positive electrode wire 272 is positioned against the bottom wall of the housing 1 along the thickness direction of the housing 1 (e.g., ...). Figure 5 The points (shown in the YY direction) have spacing, therefore, providing overlapping portions 233 of corresponding height facilitates contact with the positive electrode wire 272 of the diode element 27 to form an electrical connection. Overlap portions 233 can also be provided for the negative electrode wire 273 of the diode element 27 to form an electrical connection.

[0040] In an optional implementation, the positive electrode wire 272 and the negative electrode wire 273 of the diode element 27 (see [link to documentation]) Figure 5 It abuts against the bottom surface of the second part 2332 and against the first part 2331 (see also...)Figure 2 ) The side away from the body 271 of the diode element 27 (see Figure 4 ).

[0041] Please see Figure 4 In an optional embodiment, the photovoltaic junction box 100 further includes a support member 21 connected to the box body 1. The support member 21 is vertically disposed in the receiving cavity 11. The height of the support member 21 is higher than the height of the overlapping portion 233. The top end of the first welding portion 232 overlaps on the top end of the support member 21, thereby keeping the first welding portion 232 in an inclined state.

[0042] Please see Figure 2 In some embodiments, the auxiliary component 24 includes a bent second welding portion 242 and a support portion 243 connected together. The support portion 243 is connected to the housing 1. The bottom end of the second welding portion 242 is disposed on the support portion 243, and the top end of the second welding portion 242 is inclined relative to the support portion 243 in a direction away from the conductive component 23. The second welding portion 242 includes a second welding surface 241. The support portion 243 is provided so that the height of the second welding portion 242 is approximately the same as the height of the first welding portion 232, thereby facilitating welding.

[0043] In an optional embodiment, the support portion 243 may be connected to the bottom wall of the box body 1, or the support portion 243 may be connected to the side wall of the box body 1.

[0044] Please see Figure 3 and Figure 4 In some embodiments, the photovoltaic junction box 100 further includes a mounting member 26, which is located within the receiving cavity 11 and on the side of the auxiliary member 24 opposite to the conductive member 23. Please refer to [link to relevant documentation]. Figure 6 and Figure 7 The mounting bracket 26 includes a third part 261 and a fourth part 262 connected together. The third part 261 is connected to the side wall of the box body 1, and the third part 261 is along the thickness direction of the box body 1 (e.g., ...). Figure 6 A hollow portion 2611 is provided through the junction box 100 (shown in the YY direction). A fourth portion 262 extends away from the sidewall and connects to the support portion 243. After the busbar is welded, the photovoltaic junction box 100 is typically filled with adhesive. The hollow portion 2611 of the third portion 261 serves to partition off a portion of the space in the box 1. The hollow portion 2611 is not filled with adhesive, thus reducing adhesive usage. The fourth portion 262 is used to connect to the support portion 243. (See [reference needed]). Figure 5 On the other hand, it is used to abut against the side of the main body 271 of the diode element 27, which can limit the diode element 27 within the housing 1.

[0045] Please see Figure 7In an optional embodiment, the top surface of the fourth part 262 covers the bottom surface of the third part 261 to seal the hollow portion 2611 of the third part 261. One end of the fourth part 262 is connected to the side wall of the box body 1, and the other end extends in a direction away from the side wall.

[0046] Please see Figure 4 In some embodiments, the welding structure 2 includes two structures, which are respectively disposed on the abutment 26 along the length direction of the box body 1 (e.g., Figure 4 On opposite sides of the fourth part 262 (in the XX direction shown), the support portions 243 of the two auxiliary parts 24 are respectively connected to the fourth part 262 along the length direction of the box body 1 (as shown in the XX direction). Figure 4 The two opposite sides in the XX direction shown. Thus, the fourth part 262 of a mounting piece 26 can simultaneously fix the auxiliary parts 24 of two welding structures 2, which can reduce the space required to fix the welding structures 2, and thus make the internal structure of the photovoltaic junction box 100 more compact.

[0047] Please see Figure 7 In an optional embodiment, the fourth portion 262 of the mounting member 26 includes two connected long sides and two short sides. The two long sides are arranged opposite each other, and the two short sides are arranged opposite each other, with the short sides located between the two long sides. The support portions 243 of the auxiliary members 24 of the two welded structures 2 are respectively connected to the two short sides. Please refer to... Figure 3 The main body 271 of diode element 27 abuts against the long side of the fourth part 262 away from the side wall of the housing 1. Please refer to [link / reference]. Figure 4 The main body 271 of the diode element 27 is sandwiched between the auxiliary parts 24 of the welding structures 2 on both sides. Please refer to... Figure 5 The positive electrode wire 272 and the negative electrode wire 273 at both ends of the diode element 27 extend in a direction away from the body 271 of the diode element 27. The positive electrode wire 272 extends to the bend that abuts against the overlap portion 233 of one conductive member 23, and the negative electrode wire 273 extends to the bend that abuts against the overlap portion 233 of another conductive member 23.

[0048] In the optional implementation, please refer to Figure 3 The photovoltaic junction box 100 also includes components along the width direction of the box body 1 (e.g., Figure 3 A set of cover members 29 are arranged facing each other in the ZZ direction (as shown). Each cover member 29 includes a bent and connected fifth part 291 and a sixth part 292. The fifth part 291 protrudes from the bottom wall of the box body 1, and the sixth part 292 is arranged opposite to the bottom wall of the box body 1. The sixth parts 292 of the two cover members 29 are arranged facing each other. The two cover members 29 are arranged along the width direction of the box body 1 (e.g., along the ZZ direction). Figure 3The two groups of cover members 29 are arranged on both sides of the overlapping portion 233 along the Z-Z direction. The sixth portion 292 of the cover member 29 is used to support the first welding portion 232 of the conductive member 23, and the bending portion of the sixth portion 292 and the fifth portion 291 is used to abut the positive lead wire 272 or the negative lead wire 273 of the diode element 27. It can be understood that the cover member 29 includes two groups of cover members 29 arranged along the length direction of the box body 1 (e.g., the X-X direction) and each group of cover members 29 corresponds to one welding structure 2. Figure 3 The two groups of cover members 29 are arranged on both sides of the overlapping portion 233 along the Z-Z direction. The sixth portion 292 of the cover member 29 is used to support the first welding portion 232 of the conductive member 23, and the bending portion of the sixth portion 292 and the fifth portion 291 is used to abut the positive lead wire 272 or the negative lead wire 273 of the diode element 27. It can be understood that the cover member 29 includes two groups of cover members 29 arranged along the length direction of the box body 1 (e.g., the X-X direction) and each group of cover members 29 corresponds to one welding structure 2.

[0049] Please refer to Figure 7 In some embodiments, the bottom wall of the box body 1 is provided with a slot 28 which is in communication with the accommodating cavity 11 and is located at the bottom of the welding structure 2. By providing the slot 28, the glue can flow downward through the slot 28 when the photovoltaic junction box 100 is filled with glue, so that air bubbles can be avoided in the glue inside the glue filling.

[0050] Please refer to Figure 3 and Figure 7 The embodiments of the present application do not limit the specific position of the slot 28. In alternative embodiments, one slot 28 can be arranged between one group of cover members 29 and the overlapping portion 233 (please refer to Figure 3 ). Alternatively, one slot 28 can be arranged at the bottom of the fourth portion 262 of the hanging member 26 (please refer to Figure 7 ). Alternatively, one slot 28 can be arranged at the bottom of the main body 271 of the diode element 27 (please refer to Figure 5 ).

[0051] In a second aspect, the embodiments of the present application also provide a photovoltaic module. The photovoltaic module includes the photovoltaic junction box 100 of the first aspect. The photovoltaic module also includes a glass cover plate, a filling material, a solar cell, a back plate, a frame and the like. The photovoltaic junction box 100 is a component for connecting the internal output line and the external line of the photovoltaic module, and the photovoltaic junction box 100 is usually adhered to the surface of the back plate by using organic silicone glue. The positive bus bar and the negative bus bar inside the photovoltaic module enter the photovoltaic junction box 100 and are respectively welded to two welding structures 2 in the photovoltaic junction box 100. The positive bus bar is simultaneously welded to the tin material on the first welding surface 231 and the second welding surface 241 of one welding structure 2, and the negative bus bar is simultaneously welded to the tin material on the first welding surface 231 and the second welding surface 241 of the other welding structure 2. The external lead wire 22 can be electrically connected to the photovoltaic junction box 100 by means of insertion, welding and screw pressure connection.

[0052] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0053] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0054] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0055] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] It is to be noted that when an element such as a layer, film, or region is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that, when an element or layer is referred to as being "connected" to or "coupled" to another element or layer, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] Any combination of the technical features described above can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the scope of the specification includes all possible combinations.

[0058] The above-described embodiments are merely illustrative for the present application and are not to be used in a limiting manner. It should be understood by those skilled in the art that various modifications and improvements can be made to the present application without departing from the scope of the present application. Therefore, the scope of the present application should be defined by the appended claims.

Claims

1. A photovoltaic junction box (100), characterized in that The utility model relates to a welding structure of battery box, including: a box body (1) provided with a containing cavity (11); and a welding structure (2) located in the containing cavity (11) and connected with the box body (1), the welding structure (2) is provided with a welding port (20) for inserting busbar, the welding structure (2) is used for electrically connected with external lead (22), the welding structure (2) includes the first welding surface (231) and the second welding surface (241) towards the welding port (20), the first welding surface (231) and the second welding surface (241) are used to set welding material (25).

2. The photovoltaic junction box (100) according to claim 1, characterized in that The first welding surface (231) and the second welding surface (241) are inclined away from the welding port (20) in the direction of the end close to the welding port (20) relative to the end away from the welding port (20).

3. The photovoltaic junction box (100) according to claim 1, characterized in that The welding structure (2) includes a conductive part (23) and an auxiliary part (24) located in the containing cavity (11) and connected with the box body (1), the conductive part (23) and the auxiliary part (24) are oppositely arranged to form the welding port (20), the conductive part (23) includes the first welding surface (231), the auxiliary part (24) includes the second welding surface (241), and the conductive part (23) is used for electrically connected with the external lead (22).

4. The photovoltaic junction box (100) according to claim 3, characterized in that The conductive part (23) includes a first welding part (232) and a lap joint part (233) connected with each other, the lap joint part (233) includes a first part (2331) and a second part (2332) connected by bending, the first part (2331) is protruded on the bottom wall of the box body (1), the second part (2332) is oppositely arranged with the bottom wall, the bottom end of the first welding part (232) is lap jointed on the second part (2332), the top end of the first welding part (232) is inclined away from the welding port (20) relative to the auxiliary part (24), and the first welding part (232) includes the first welding surface (231).

5. The photovoltaic junction box (100) according to claim 3, characterized in that The auxiliary part (24) includes a second welding part (242) and a supporting part (243) connected by bending, the supporting part (243) is connected with the box body (1), the bottom end of the second welding part (242) is arranged on the supporting part (243), the top end of the second welding part (242) is inclined away from the conductive part (23) relative to the supporting part (243), and the second welding part (242) includes the second welding surface (241).

6. The photovoltaic junction box (100) according to claim 5, characterized in that The photovoltaic junction box (100) further comprises a hanging component (26) located in the accommodating cavity (11), the hanging component (26) is located on the side of the auxiliary component (24) away from the conductive component (23), the hanging component (26) comprises a third part (261) and a fourth part (262) connected with each other, the third part (261) is connected with the side wall of the box body (1), the third part (261) is provided with a hollow portion (2611) penetrating along the thickness direction of the box body (1), the fourth part (262) extends away from the side wall, and the fourth part (262) is connected with the supporting part (243).

7. The photovoltaic junction box (100) according to claim 6, characterized in that The welding structure (2) comprises two, and the welding structure (2) is arranged on opposite sides of the hanging component (26) along the length direction of the box body (1), and the supporting parts (243) of the two auxiliary components (24) are respectively connected to opposite sides of the fourth part (262) along the length direction of the box body (1).

8. The photovoltaic junction box (100) according to any one of claims 1 to 7, characterized in that The photovoltaic junction box (100) further comprises a diode element (27) located in the accommodating cavity (11), and the diode element (27) is electrically connected with the welding structure (2).

9. The photovoltaic junction box (100) according to any one of claims 1 to 7, characterized in that The bottom wall of the box body (1) is provided with a slot (28) communicating with the accommodating cavity (11), and the slot (28) is located at the bottom of the welding structure (2).

10. A photovoltaic module, characterized by, The photovoltaic assembly comprises the photovoltaic junction box (100) according to any one of claims 1 to 9.

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