Metal connecting piece, photovoltaic junction box device and photovoltaic module

Abstract

The embodiment of the invention provides a metal connecting piece, a photovoltaic junction box device and a photovoltaic module. The metal connecting piece comprises a first sheet, the first sheet comprises a first area, a middle area and a second area, the first area, the middle area and the second area are sequentially distributed in the first direction, and the first area and the second area are used for being electrically connected with external devices respectively; at least one side edge of the middle area extends in the second direction and protrudes out of the first area, and an included angle of 70-100 degrees is formed between the second direction and the first direction. The metal connecting piece and / or the conducting strip are / is applied to the photovoltaic junction box device, the heat dissipation area can be increased, the heat dissipation efficiency can be improved, sintering breakdown of a diode is avoided, and then the service life of a photovoltaic module is prolonged.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell technology, and in particular to a metal connector, a photovoltaic junction box device and a photovoltaic module. Background Art

[0002] Photovoltaic modules are usually equipped with a photovoltaic junction box device to output the current generated by the photovoltaic module. The photovoltaic junction box device includes at least one diode, which is electrically connected to the busbar through a conductive sheet or the like. The diode is usually encapsulated in a plastic package to improve the stability of the diode in outdoor applications. The diode generates heat during the power-on process. Due to the sealing of the plastic package, the heat generated by the diode is not easy to be discharged, which can easily lead to an excessively high junction temperature of the diode, affecting the quality of the diode and further affecting the stability of the photovoltaic module.

[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Summary of the invention

[0004] The embodiments of the present application provide a metal connector, a photovoltaic junction box device and a photovoltaic module to solve or alleviate one or more of the technical problems mentioned above.

[0005] As a first aspect of an embodiment of the present application, an embodiment of the present application provides a metal connector, comprising: a first sheet material, the first sheet material comprising a first area, an intermediate area, and a second area distributed in sequence along a first direction, the first area and the second area being respectively used for electrical connection with an external device; at least one side edge of the intermediate area extends along a second direction and protrudes from the first area, and the second direction forms an angle of 70°-100° with the first direction.

[0006] In one embodiment, the second area is a first "T"-shaped structure, the vertical side of the first "T"-shaped structure extends along the first direction; the horizontal side of the first "T"-shaped structure is located on the side away from the first area.

[0007] In one embodiment, the size of the middle area along the second direction is 3 / 2-3 times the size of the first area along the second direction; the size of the horizontal side of the first "T"-shaped structure along the second direction is 4 / 3-3 times the size of the first area along the second direction.

[0008] In one embodiment, a second sheet is further included, which is fixedly connected to the first sheet at a position close to the middle sheet area and is bent and extended in a direction away from / close to the first sheet area.

[0009] In one embodiment, the second sheet material is a corrugated sheet material, and the corrugated sheet material extends in a corrugated shape in a direction away from the first sheet area.

[0010] In one embodiment, the second sheet material is bent and extended in a direction away from the first sheet area, and the second sheet material is a second "T"-shaped structure, and the lateral side of the second "T"-shaped structure is located on the side away from the first sheet area.

[0011] In one embodiment, the first sheet and the second sheet are integrally formed.

[0012] As a second aspect of an embodiment of the present application, an embodiment of the present application provides a conductive sheet, including a conductive sheet body, the conductive sheet body including a first surface and a second surface arranged opposite to each other, at least one of the first surface and the second surface including a plurality of first grooves recessed toward the opposite surface.

[0013] In one embodiment, the plurality of first grooves are distributed in a matrix on the first surface and / or the second surface.

[0014] In one embodiment, the first surface includes a plurality of first grooves recessed toward the second surface, and the second surface is a surface of the conductive sheet body for electrical connection with an external device.

[0015] In one embodiment, the depth of the first groove is 1 / 10 to 1 / 2 of the thickness of the conductive sheet body; and the depth of the first groove is greater than 0.2 mm.

[0016] As a third aspect of an embodiment of the present application, an embodiment of the present application provides a photovoltaic junction box device, including: a diode, a metal connector, a first conductive sheet and a second conductive sheet; the first connection end of the diode is electrically connected to the first conductive sheet, the second connection end of the diode is electrically connected to the metal connector, and the metal connector is electrically connected to the second conductive sheet; the metal connector adopts the metal connector of any implementation aspect of the above-mentioned embodiments, wherein the first sheet area of ​​the metal connector is electrically connected to the second connection end, and the second sheet area is electrically connected to the second conductive sheet.

[0017] In one embodiment, a size of the middle plate region of the metal connector along the second direction is smaller than a size of the first / second conductive plate along the second direction.

[0018] In one embodiment, the size of the middle area of ​​the metal connector along the second direction is larger than the size of the first / second conductive sheet along the second direction, and the side of the middle area is bent along the side of the first / second conductive sheet from the second surface of the first / second conductive sheet and extends to the first surface of the first / second conductive sheet.

[0019] In one embodiment, the second sheet and the first sheet of the metal connector are respectively disposed on two opposite sides of the second conductive sheet.

[0020] In one implementation, the first conductive sheet and / or the second conductive sheet is / are the conductive sheet of any of the above embodiments.

[0021] In one embodiment, the side of the second conductive sheet adjacent to the first conductive sheet is a concave structure, and the side of the first conductive sheet adjacent to the second conductive sheet is a convex structure, and the convex structure is matched with the concave structure.

[0022] In one embodiment, there is a hollow area with a preset spacing between the convex structure and the concave structure, and the size of the middle area along the first direction is adapted to the size of the hollow area; the preset spacing is smaller than the concave depth of the concave structure, and the side of the middle area contacts at least one end of the concave structure.

[0023] In one embodiment, the first conductive sheet and / or the second conductive sheet is further provided with a second groove, and the second groove penetrates the first conductive sheet and / or the second conductive sheet along the second direction; The photovoltaic junction box device also includes a plastic packaging part for encapsulating the diode and the device electrically connected to the diode; a plurality of glue locking holes are respectively provided in the first conductive sheet and the second conductive sheet to inject the plastic packaging material through the glue locking holes; at least one glue locking hole is located on the side of the second groove away from the metal connector.

[0024] In one embodiment, the plastic package includes a base and an upper cover, the size of the base along the first direction is larger than the size of the upper cover along the first direction, and the upper cover is arranged near the middle of the base; the height of the base is higher than the height of the first conductive sheet and / or the second conductive sheet.

[0025] In one embodiment, the base includes two base side edges along the second direction, and both base side edges are concavely arranged and are concavely arranged to be flush with the upper cover.

[0026] In one embodiment, the base includes two base side edges along the second direction, one base side edge is concave and concave to be flush with the upper cover; the other base side edge is convex, and the depth of the convex is the same as the depth of the concave.

[0027] As a fourth aspect of an embodiment of the present application, an embodiment of the present application provides a photovoltaic component, comprising a photovoltaic component body and a photovoltaic junction box device of any implementation aspect of the above embodiments, wherein the bus bar in the photovoltaic component body is electrically connected to the first conductive sheet or the second conductive sheet in the photovoltaic junction box device.

[0028] The metal connector and / or conductive sheet provided in the embodiments of the present application is applied to a photovoltaic junction box device, which can increase the heat dissipation area, improve the heat dissipation efficiency, avoid diode sintering breakdown, and thus increase the service life of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0029] Figure 1 A schematic structural diagram of a metal connector provided in one embodiment of the present application is shown.

[0030] Figure 2 A schematic diagram showing the differentiation of a metal connector with differentiation marks provided in one embodiment of the present application is shown.

[0031] Figure 3 A schematic side view of the structure of a metal connector provided in another embodiment of the present application is shown.

[0032] Figure 4 A schematic side view of the conductive sheet provided in one embodiment of the present application is shown.

[0033] Figure 5 A schematic structural diagram showing the arrangement of the first conductive sheet and the second conductive sheet in a photovoltaic junction box device provided in an embodiment of the present application is shown.

[0034] Figure 6 A schematic structural diagram of a photovoltaic junction box device provided in one embodiment of the present application is shown.

[0035] Figure 7 A schematic side view of the structure of a plastic package provided in one embodiment of the present application is shown.

[0036] Figure 8 A schematic structural diagram of a photovoltaic junction box device provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for broadly including quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0040] Hereinafter, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited to the embodiments described herein.

[0041] The embodiment of the present application provides a metal connector, which is applied to a junction box device of a photovoltaic module to be electrically connected to a diode and a conductive sheet respectively.

[0042] Figure 1 A schematic structural diagram of a metal connector provided in one embodiment of the present application is shown. Figure 2 FIG. 1 is a schematic diagram showing a metal connector with a distinguishing mark provided in an embodiment of the present application. Figure 1 and Figure 2As shown, the metal connector 100 provided in the embodiment of the present application includes a first sheet 110. The first sheet 110 includes a first area 111, a middle area 112, and a second area 113 distributed in sequence along a first direction, and the first area 111 and the second area 113 are respectively used to electrically connect with external devices; the external device can be a diode and / or a conductive sheet. At least one side of the middle area 112 extends along a second direction and protrudes from the first area 111, and the second direction forms an angle of 70°-100° with the first direction. Figure 2 In the figure, dotted lines are used to distinguish the first area 111 , the middle area 112 and the second area 113 , and the dotted lines do not represent the specific structure of the metal connector 100 .

[0043] like Figure 1 As shown, the first direction can be Figure 1 The second direction may be a direction perpendicular to the first direction or a direction approximately perpendicular to the first direction.

[0044] Based on the setting that the side of the middle area 112 extends toward the second direction and is protruding from the first area 111, the heat dissipation area of ​​the metal connector 100 can be increased, and almost no current passes through the part protruding from the first area 111, and the heat dissipation effect is good. Therefore, the use of the metal connector 100 provided in the embodiment of the present application in the photovoltaic junction box device can increase the heat dissipation area, improve the heat dissipation efficiency, avoid sintering and breakdown of the diode 300, and thus increase the service life of the photovoltaic module.

[0045] In one embodiment, the second area 113 is a first “T”-shaped structure, the vertical side of the first “T”-shaped structure extends along the first direction; and the horizontal side of the first “T”-shaped structure is located on the side away from the first area 111 .

[0046] In the photovoltaic junction box device, the metal connector 100 has a conductive function, and the current is transmitted from the first area 111 to the second area 113, and then transmitted to an external device, such as a conductive sheet, through the second area 113. The second area 113 is a first "T"-shaped structure, which can increase the current transmission area after the current is conducted to the second area 113, improve the current transmission efficiency, and further improve the heat dissipation efficiency.

[0047] In one embodiment, the size of the middle area 112 along the second direction is 3 / 2-3 times the size of the first area 111 along the second direction; the size of the horizontal side of the first "T"-shaped structure along the second direction is 4 / 3-3 times the size of the first area 111 along the second direction.

[0048] In one example, the first area 111 is electrically connected to the pin of the external device, and the width (dimension along the second direction) of the first area 111 is relatively narrow. In order to increase heat dissipation, the dimension of the middle area 112 along the second direction cannot be too short, and needs to extend as far as possible toward the second direction. Therefore, the dimension of the middle area 112 along the second direction can also be determined based on the extendable space in a specific application scenario. The dimension of the middle area 112 along the second direction cannot be too small, for example, less than 2 / 3 of the width of the first area 111, then the heat dissipation area that can be increased is limited, and it is not of great significance to improve the heat dissipation effect, and it is not necessary to deliberately protrude from the first area 111, and it may also increase the manufacturing cost. If the dimension of the middle area 112 along the second direction is too large, for example, greater than 3 times the width of the first area 111, then the space requirement for the middle area 112 to extend along the second direction is large. In the case of such a large extension space, other simpler heat dissipation methods can be adopted. Therefore, when the metal connector 100 provided in the embodiment of the present application is used to connect external devices and the heat dissipation effect is expected to be effectively improved, the size of the middle area 112 along the second direction is 3 / 2-3 times the size of the first area 111 along the second direction, for example, 3 / 2 times, 2 times or 3 times.

[0049] In one embodiment, Figure 3 As shown, the metal connector 100 further includes a second sheet 120 , which is fixedly connected to the first sheet 110 at a position close to the middle sheet area 112 , and is bent and extended in a direction away from / close to the first sheet area 111 .

[0050] The second sheet 120 starts from the middle area 112 and extends toward a plane different from the first sheet 110, so that the metal connector 100 fully utilizes the space above and below the metal connector 100 to increase the heat dissipation area. Without increasing the space occupied by the device, more heat dissipation area is effectively increased, greatly improving the heat dissipation effect.

[0051] In one example, the second sheet area 113 of the first sheet 110 in the metal connector 100 is attached to the upper surface of the conductive sheet, and the second sheet 120 can be attached to the lower surface of the conductive sheet. Since the second sheet 120 does not need to be conductive, the second sheet 120 can be attached to the conductive sheet, either in contact or not, and no welding is required.

[0052] In one embodiment, the second sheet material 120 is a corrugated sheet material, and the corrugated sheet material extends in a wave shape in a direction away from the first sheet area 111 .

[0053] The corrugated sheet may be a structure including a plurality of crests and a plurality of troughs, wherein the plurality of crests and the plurality of troughs are staggered, and the slopes at the crests and the troughs may not be limited.

[0054] The corrugated sheet may also include a plurality of concave portions and a plurality of convex portions, and the plurality of concave portions and the plurality of convex portions may be arranged in a staggered manner. The shapes of the concave portions and the convex portions may not be limited and may be a flush structure.

[0055] In the corrugated sheet, the distance between the highest point and the lowest point is determined based on the accommodating space in the device. The larger the accommodating space is, the larger the distance can be.

[0056] In the embodiment of the present application, the second sheet 120 is designed as a corrugated sheet, so that the heat dissipation area of ​​the metal connector 100 can be further increased.

[0057] In one embodiment, the second sheet 120 bends and extends in a direction away from the first sheet area 111 , and the second sheet 120 is a second “T”-shaped structure, with the lateral side of the second “T”-shaped structure located on the side away from the first sheet area 111 .

[0058] Based on the design of the first "T"-shaped structure in the second area 113 of the first sheet 110, it can be known that there will also be space on the lower surface of the conductive sheet that can accommodate the "T"-shaped structure. Therefore, by designing the second sheet 120 as a second "T"-shaped structure, the heat dissipation area can be further increased.

[0059] In one embodiment, the first sheet 110 and the second sheet 120 are integrally formed. The integrally formed structure makes the metal connector 100 more stable, convenient for processing, and does not crack, thereby avoiding the influence of the heat dissipation effect due to disconnection.

[0060] The embodiment of the present application also provides a conductive sheet, Figure 4 FIG. 2 shows a schematic structural diagram of a conductive sheet provided by an embodiment of the present application. Figure 4 As shown, the conductive sheet includes a conductive sheet body, which includes a first surface 211 and a second surface 212 arranged opposite to each other, and at least one of the first surface 211 and the second surface 212 includes a plurality of first grooves 201 recessed toward the opposite surface.

[0061] In the embodiment of the present application, a first groove 201 is provided on the surface of the conductive sheet body to increase the heat dissipation area of ​​the conductive sheet body and improve the heat dissipation efficiency.

[0062] In one embodiment, the plurality of first grooves 201 are distributed in a matrix on the first surface 211 and / or the second surface 212 .

[0063] The plurality of first grooves 201 are distributed in a matrix on the first surface 211 and / or the second surface 212, so that the heat dissipation area can be extended not only in the lateral direction but also in the longitudinal direction, thereby increasing more heat dissipation area and further improving the heat dissipation effect.

[0064] In one embodiment, the first surface 211 includes a plurality of first grooves 201 that are recessed toward the second surface 212 . The second surface 212 is a surface of the conductive sheet body that is used for electrical connection with an external device.

[0065] In the embodiment of the present application, only the first groove 201 is provided on the first surface 211, and the second surface 212 is used for welding with external devices to conduct current. The groove-free structure of the second surface 212 can facilitate the linear transmission of current and avoid affecting the current transmission.

[0066] In one embodiment, the depth of the first groove 201 is 1 / 10 to 1 / 2 of the thickness of the conductive sheet body; and the depth of the first groove 201 is greater than 0.2 mm.

[0067] The thickness of the conductive sheet can be 0.4 mm to 2 mm. If the depth of the first groove 201 is too small, the increased heat dissipation area is limited, the significance of improving the heat dissipation effect is not great, and the increased manufacturing cost is not considered. Therefore, the embodiment of the present application limits the depth of the first groove 201 to be greater than 0.2 mm.

[0068] The depth of the first groove 201 is 1 / 10 to 1 / 2 of the thickness of the conductive sheet. For example, if the thickness of the conductive sheet is 1 mm, the depth of the first groove 201 is greater than 0.1 mm. However, the improvement of the heat dissipation effect based on 0.1 mm is not significant. Therefore, the depth of the first groove 201 needs to be greater than 0.2 mm.

[0069] In one example, the thickness of the conductive sheet is 2 mm, and the maximum depth of the first groove 201 is limited to 1 mm. If the depth is too deep, the manufacturing cost of the conductive sheet will be affected.

[0070] The present application embodiment provides a photovoltaic junction box device, such as Figures 5 to 8 As shown, the photovoltaic junction box device includes: a diode 300, a metal connector 100, a first conductive sheet 210 and a second conductive sheet 220; the first connection end of the diode 300 is electrically connected to the first conductive sheet 210, the second connection end of the diode 300 is electrically connected to the metal connector 100, and the metal connector 100 is electrically connected to the second conductive sheet 220; the metal connector 100 adopts the metal connector 100 of any implementation aspect of the above-mentioned embodiments, wherein the first sheet area 111 of the metal connector 100 is electrically connected to the second connection end, and the second sheet area 113 is electrically connected to the second conductive sheet 220.

[0071] The photovoltaic junction box device of the embodiment of the present application is applied to the photovoltaic module and is bonded to the back of the photovoltaic module to conduct current to external devices. The photovoltaic junction box device includes a diode 300, which connects the bus bar of the photovoltaic module and the external device to output a stable voltage.

[0072] The photovoltaic junction box device of the embodiment of the present application adopts the above-mentioned metal connector 100, which can increase the heat dissipation area, improve the heat dissipation efficiency, avoid sintering and breakdown of the diode 300, and thus increase the service life of the photovoltaic module.

[0073] In one embodiment, the size of the middle plate region 112 of the metal connector 100 along the second direction is smaller than the size of the first conductive plate 210 / the second conductive plate 220 along the second direction.

[0074] The middle plate area 112 of the metal connector 100 may be attached to the first conductive plate 210 or the second conductive plate 220 , and may be specifically determined according to the actual spatial structure.

[0075] The middle section 112 of the metal connector 100 is attached to the second surface 212 of the first conductive sheet 210 or the second conductive sheet 220, so the size of the middle section 112 along the second direction is smaller than the size of the first conductive sheet 210 / the second conductive sheet 220 along the second direction. The size of the middle section 112 along the second direction can be extended to the side of the first / second conductive sheet 220 as much as possible, but not beyond the side, so as to avoid increasing the area of ​​the photovoltaic junction box device due to the middle section 112 and affecting the power generation efficiency of the photovoltaic module.

[0076] Exemplarily, the size of the middle section 112 along the second direction is 2 / 3-9 / 10, such as 2 / 3, 5 / 7 or 9 / 10, of the size of the first conductive sheet 210 or the second conductive sheet 220 along the second direction, so as to fully extend the area of ​​the middle section 112 .

[0077] In one embodiment, the size of the middle section 112 of the metal connector 100 along the second direction is greater than the size of the first / second conductive sheet 220 along the second direction, and the side of the middle section 112 is bent along the side of the first / second conductive sheet 220 from the second surface 212 of the first / second conductive sheet 220 and extends to the first surface 211 of the first / second conductive sheet 220.

[0078] In this case, that is, the middle area 112 goes around the side of the first / second conductive sheet 220 to the opposite surface, the heat dissipation area can be increased to a large extent. Based on the thin thickness of the first sheet 110, the increased area due to bypassing the side is not large, and the heat dissipation effect can be better improved. Therefore, this solution is within the scope of implementation of the embodiment of the present application.

[0079] In one embodiment, the second sheet 120 and the first sheet 110 of the metal connector 100 are respectively disposed on two opposite sides of the second conductive sheet 220 .

[0080] Exemplarily, the first sheet 110 is attached to the second surface 212 of the second conductive sheet 220, and the second sheet 120 is attached to the first surface 211 of the second conductive sheet 220. By arranging in this way, the heat dissipation area is greatly increased based on the second sheet 120, while the space occupation of the photovoltaic junction box device is not affected.

[0081] In one implementation, the first conductive sheet 210 and / or the second conductive sheet 220 are / is the conductive sheet of any of the above embodiments.

[0082] The conductive sheet provided in the above embodiment is provided with a first groove 201 and has a good heat dissipation effect. Therefore, by adopting the conductive sheet provided in the above embodiment, the heat dissipation effect can be further improved to ensure that the diode 300 will not sinter and break down, thereby extending the service life of the photovoltaic module.

[0083] In one embodiment, Figure 4 As shown, the side of the second conductive sheet 220 adjacent to the first conductive sheet 210 is a concave structure, and the side of the first conductive sheet 210 adjacent to the second conductive sheet 220 is a convex structure, and the convex structure is adapted to the concave structure.

[0084] In the photovoltaic junction box device, the first conductive sheet 210 and the second conductive sheet 220 are arranged side by side, and a metal connector 100, a diode 300, etc. are connected in between. Since all the components in the photovoltaic junction box device are fixed by the plastic seal 400, the first conductive sheet 210 and the second conductive sheet 220 are designed with a convex structure and a concave structure, so that the metal connector 100 connected between the first conductive sheet 210 and the second conductive sheet 220 has a better supporting effect, and the connection between the metal connector 100 and the second conductive sheet 220 and the diode 300 is more stable.

[0085] Secondly, the first conductive sheet 210 and the second conductive sheet 220 can simultaneously increase the plastic sealing length of the first conductive sheet 210 and the second conductive sheet 220 in the plastic sealing member 400 through the coordinated design of the convex structure and the concave structure, so that the structure of the photovoltaic junction box device is more stable, the performance is more reliable, and the service life of the photovoltaic module is further extended.

[0086] In one embodiment, there is a hollow area with a preset spacing between the convex structure and the concave structure, and the size of the middle area 112 along the first direction is adapted to the size of the hollow area along the first direction; the preset spacing is smaller than the concave depth of the concave structure, and the side of the middle area 112 is in contact with at least one end of the concave structure.

[0087] The preset spacing is smaller than the concave depth of the concave structure, which can ensure that there is a cross portion between the first conductive sheet 210 and the second conductive sheet 220, thereby improving the stability and strength of the photovoltaic junction box device.

[0088] In addition, if Figure 6 and Figure 8 As shown, when the side of the second conductive sheet 220 adjacent to the first conductive sheet 210 is a concave structure and the side of the first conductive sheet 210 adjacent to the second conductive sheet 220 is a convex structure, the middle sheet area 112 of the metal connector 100 is attached to the second conductive sheet 220, and is mounted in the hollow area and overlapped with the two arms of the concave structure of the second conductive sheet.

[0089] In one embodiment, the first conductive sheet 210 and / or the second conductive sheet 220 is further provided with a second groove 205, and the second groove 205 penetrates the first conductive sheet 210 and / or the second conductive sheet 220 along the second direction; the photovoltaic junction box device also includes a plastic package 400, which is used to encapsulate the diode 300 and the device electrically connected to the diode 300; the first conductive sheet 210 and the second conductive sheet 220 are respectively provided with a plurality of glue locking holes 202, so as to inject the plastic packaging material through the glue locking holes 202; at least one glue locking hole 202 is located on the side of the second groove 205 away from the metal connector 100.

[0090] The glue locking hole 202 is located on the side of the second groove 205 away from the metal connector 100, so that the plastic sealing material can be injected into the second groove 205. The structural design of the second groove 205 can improve the water-blocking performance of the photovoltaic junction box device and prevent external water vapor from entering the plastic sealing part 400. The design of the second groove 205 requires a curved route for water vapor to enter the plastic sealing part 400, so it has a water-blocking effect. The second groove 205 passes through the first conductive sheet 210 and / or the second conductive sheet 220 along the second direction, so that the second groove 205 can block water from the entire transverse cross section to ensure the water-blocking effect.

[0091] In one example, the number of the second grooves 205 is greater than 2, and the water blocking effect is better.

[0092] In one embodiment, the plastic package 400 includes a base 410 and an upper cover 420, the size of the base 410 along the first direction is larger than the size of the upper cover 420 along the first direction, and the upper cover 420 is arranged near the middle of the base 410; the height of the base 410 is higher than the height of the first conductive sheet 210 and / or the second conductive sheet 220.

[0093] By dividing the plastic package 400 into a base 410 and an upper cover 420, and the base 410 is wider than the upper cover 420, the first conductive sheet 210 and / or the second conductive sheet 220 are supported by the base 410 after being led out of the plastic package 400, thereby improving the impact resistance of the first conductive sheet 210 and / or the second conductive sheet 220 and preventing the first conductive sheet 210 and / or the second conductive sheet 220 from being bent upward or downward after being led out of the plastic package 400.

[0094] In one embodiment, the base 410 includes two base side edges along the second direction, and both base side edges are concave and are concave to be flush with the upper cover 420 .

[0095] After the base 410 supports the first conductive sheet 210 / the second conductive sheet 220 , the concave configuration in the middle portion can increase the heat dissipation area of ​​the first conductive sheet 210 / the second conductive sheet 220 and improve the heat dissipation effect.

[0096] The inner recessed portion 420 is flush with the upper cover 420 , which can increase the heat dissipation area to the maximum extent while ensuring the impact resistance of the first conductive sheet 210 and / or the second conductive sheet 220 , improve the overall aesthetics of the plastic package 400 , and reduce unnecessary protrusions.

[0097] In one embodiment, the base 410 includes two base side edges along the second direction, one base side edge is concave and concave to be flush with the upper cover 420; the other base side edge is convex and the depth of the convex is the same as the depth of the concave.

[0098] The two side edges of the base 410 are concave on one side and convex on the other side, so that the heat dissipation area of ​​the first conductive sheet 210 and / or the second conductive sheet 220 can be increased based on the concave setting. At the same time, the convex setting on the other side can enhance the impact resistance of the middle part of the first conductive sheet 210 and / or the second conductive sheet 220, thereby improving the balanced impact resistance performance of the photovoltaic junction box device.

[0099] The embodiment of the present application further provides a photovoltaic assembly, comprising a photovoltaic assembly body and a photovoltaic junction box device according to any one of the above embodiments, wherein the bus bar in the photovoltaic assembly body is electrically connected to the first conductive sheet 210 or the second conductive sheet 220 in the photovoltaic junction box device.

[0100] The first conductive sheet 210 and / or the second conductive sheet 220 are further provided with busbar through-holes 203 for the busbars of the photovoltaic module body to pass through the busbar through-holes 203 and be welded to the welding areas 206 of the first conductive sheet 210 and / or the second conductive sheet 220 .

[0101] The first conductive sheet 210 and / or the second conductive sheet 220 are also provided with mounting holes 204 to fix the plastic-sealed photovoltaic junction box device on the photovoltaic module body.

[0102] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0103] For the convenience of description, the orientation or position relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" is usually based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0104] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; 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 this application can be understood according to specific circumstances.

[0105] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

[0106] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0107] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0108] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0109] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A metal connector, characterized in that: include: A first sheet material, comprising a first area, a middle area, and a second area distributed in sequence along a first direction, wherein the first area and the second area are respectively used for electrical connection with external devices; at least one side of the middle area extends along a second direction and protrudes from the first area, and the second direction forms an angle of 70°-100° with the first direction.

2. The metal connector according to claim 1, characterized in that: The second area is a first "T"-shaped structure, the vertical side of the first "T"-shaped structure extends along the first direction; the horizontal side of the first "T"-shaped structure is located on the side away from the first area.

3. The metal connector according to claim 2, characterized in that: The size of the middle area along the second direction is 3 / 2-3 times the size of the first area along the second direction; the size of the horizontal side of the first "T"-shaped structure along the second direction is 4 / 3-3 times the size of the first area along the second direction.

4. The metal connector according to claim 1, characterized in that: It also includes a second sheet material, which is fixedly connected to the first sheet material at a position close to the middle sheet area and is bent and extended in a direction away from / close to the first sheet area.

5. The metal connector according to claim 4, characterized in that: The second sheet material is a corrugated sheet material, and the corrugated sheet material extends in a corrugated shape in a direction away from the first sheet area.

6. The metal connector according to claim 4, characterized in that: The second sheet material is bent and extended in a direction away from the first sheet area, and the second sheet material is a second "T"-shaped structure, and the horizontal side of the second "T"-shaped structure is located on a side away from the first sheet area.

7. The metal connector according to any one of claims 4 to 6, characterized in that: The first sheet material and the second sheet material are integrally formed.

8. A photovoltaic junction box device, characterized in that: include: A diode, a metal connector, a first conductive sheet and a second conductive sheet; the first connection end of the diode is electrically connected to the first conductive sheet, the second connection end of the diode is electrically connected to the metal connector, and the metal connector is electrically connected to the second conductive sheet; the metal connector adopts the metal connector according to any one of claims 1 to 7, wherein the first sheet area of ​​the metal connector is electrically connected to the second connection end, and the second sheet area is electrically connected to the second conductive sheet.

9. The photovoltaic junction box device according to claim 8, characterized in that: A size of a middle plate region of the metal connector along the second direction is smaller than a size of the first / second conductive plate along the second direction.

10. The photovoltaic junction box device according to claim 8, characterized in that: The size of the middle area of ​​the metal connector along the second direction is greater than the size of the first / second conductive sheet along the second direction, and the side of the middle area is bent along the side of the first / second conductive sheet from the second surface of the first / second conductive sheet and extends to the first surface of the first / second conductive sheet.

11. The photovoltaic junction box device according to claim 8, characterized in that: The second sheet and the first sheet of the metal connecting member are respectively arranged on two opposite sides of the second conductive sheet.

12. The photovoltaic junction box device according to claim 11, characterized in that: The side of the second conductive sheet adjacent to the first conductive sheet is a concave structure, and the side of the first conductive sheet adjacent to the second conductive sheet is a convex structure, and the convex structure is matched with the concave structure.

13. The photovoltaic junction box device according to claim 12, characterized in that: There is a hollow area with a preset spacing between the convex structure and the concave structure, and the size of the middle area of ​​the metal connector along the first direction is adapted to the size of the hollow area; the preset spacing is smaller than the concave depth of the concave structure, and the side of the middle area is in contact with at least one end of the concave structure.

14. The photovoltaic junction box device according to claim 11, characterized in that: The first conductive sheet and / or the second conductive sheet is further provided with a second groove, and the second groove penetrates the first conductive sheet and / or the second conductive sheet along a second direction; The photovoltaic junction box device also includes a plastic packaging member for encapsulating the diode and a device electrically connected to the diode; a plurality of glue locking holes are respectively provided in the first conductive sheet and the second conductive sheet to inject plastic packaging material through the glue locking holes; at least one of the glue locking holes is located on a side of the second groove away from the metal connector.

15. The photovoltaic junction box device according to claim 14, characterized in that: The plastic package includes a base and an upper cover, the size of the base along the first direction is larger than the size of the upper cover along the first direction, and the upper cover is arranged close to the middle of the base; the height of the base is higher than the height of the first conductive sheet and / or the second conductive sheet.

16. The photovoltaic junction box device according to claim 15, characterized in that: The base includes two base side edges along the second direction, and both of the base side edges are concavely arranged and are concavely arranged to be flush with the upper cover.

17. The photovoltaic junction box device according to claim 15, characterized in that: The base includes two base side edges along the second direction, one of the base side edges is concave and is concave to be flush with the upper cover; the other base side edge is convex, and the depth of the convex is the same as the depth of the concave.

18. A photovoltaic module, characterized in that: It comprises a photovoltaic component body and the photovoltaic junction box device according to any one of claims 8 to 17, wherein the bus bar in the photovoltaic component body is electrically connected to the first conductive sheet or the second conductive sheet in the photovoltaic junction box device.

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