Photovoltaic bypass protection and countercurrent prevention module, junction box assembly and junction box

Abstract

The utility model relates to a photovoltaic bypass protection and countercurrent prevention module, a junction box assembly and a junction box. The device mainly comprises N groups of first electronic devices with unilateral conductivity, the N groups of first electronic devices are configured to be arranged in a junction box assembly and connected in series, and the first electronic devices are configured to be second electronic devices with an anti-reflux function and used for being connected in series and parallel with a solar cell sub-series. The second electronic device is configured to be arranged in the junction box assembly and connected with the N groups of first electronic devices in series, a first electrode of the second electronic device is configured to be electrically connected with a second electrode of a series circuit formed by the N groups of first electronic devices, and a second electrode of the second electronic device is configured to be electrically connected with an external cable. The junction box assembly is beneficial to preventing the photovoltaic bypass protection and anti-reflux module from being influenced by reverse current, and is convenient to quickly assemble and use.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar photovoltaic power generation technical field especially is involved in photovoltaic bypass protection and prevent reverse flow module, junction box subassembly and junction box. BACKGROUND

[0002] The photovoltaic bypass protection module is an important component in the photovoltaic assembly, and is mainly used for improving the reliability and efficiency of the photovoltaic system. When the current of a certain cell in the photovoltaic cell string is not matched due to shading, damage or performance degradation, the photovoltaic bypass protection module can provide a low-resistance bypass path for the cell, so that the current bypasses the faulty cell and continues to flow, thereby reducing the hot spot effect and maintaining the power generation efficiency of the entire photovoltaic assembly.

[0003] When the photovoltaic assembly in the photovoltaic string is completely shaded by more than a certain proportion, and the other strings connected thereto are working normally, the current of the normally working string may flow in the opposite direction (backflow), which may cause damage to the connected backflow assembly. In order to prevent the backflow current from causing damage to the connected backflow assembly, some schemes are used in the prior art to prevent reverse current, but these schemes have a complex structure, are not convenient for quick assembly and use, and have a high cost. SUMMARY

[0004] Therefore, a photovoltaic bypass protection and reverse current prevention module is provided. The photovoltaic bypass protection and reverse current prevention module is beneficial to prevent the photovoltaic bypass protection and reverse current prevention module from being affected by reverse current, and has a simple structure, is convenient for quick assembly and use.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A photovoltaic bypass protection and reverse current prevention module is configured to be arranged in a junction box assembly, comprising:

[0007] N groups of first electronic devices with one-way conduction performance and bypass protection function, wherein N≥1, the N groups of first electronic devices are connected in series with each other, and the first electronic devices are configured to be connected in parallel with the solar cell sub-string,

[0008] A second electronic device with reverse current prevention function, the second electronic device is connected in series with the N groups of first electronic devices,

[0009] The first electrode of the second electronic device is configured to be electrically connected with the second electrode of the series circuit composed of the N groups of first electronic devices.

[0010] In one embodiment, a resistor is further included, one end of the resistor is electrically connected with the first electrode of the second electronic device, and the other end of the resistor is electrically connected with the second electrode of the second electronic device.

[0011] In one of the embodiments,

[0012] The first electronic device comprises a first electronic device body and a first pin and a second pin fixedly and electrically connected with the first electronic device body, the first pin representing a first electrode of the first electronic device, and the second pin representing a second electrode of the first electronic device.

[0013] The second electronic device comprises a second electronic device body and a third pin and a fourth pin fixedly and electrically connected with the second electronic device body, the third pin representing a first electrode of the second electronic device, and the fourth pin representing a second electrode of the second electronic device.

[0014] In one of the embodiments,

[0015] Further comprising a first conductive module for electrically connecting with the first electronic device and a second conductive module for electrically connecting with the second electronic device.

[0016] The number of the first electronic devices electrically connected with the first conductive module is one or more.

[0017] In one of the embodiments, the first electronic device is a first MOS tube, the first MOS tube is integrated with a controller module, the controller module is used for controlling the first MOS tube, the first conductive module is a first PCB board or other conductive carrier board, the first MOS tube is fixedly installed on the first PCB board, the first PCB board has a first conductive area and a second conductive area insulated and separated from each other, a first electrode of the first MOS tube is electrically connected with the first conductive area, and a second electrode of the first MOS tube is electrically connected with the second conductive area.

[0018] In one of the embodiments, the first PCB board is provided with a first bus bar welding area and a second bus bar welding area insulated and separated from each other, the first bus bar welding area and the first conductive area are arranged together to form an electrical connection, or the first bus bar welding area and the first conductive area are electrically connected through a conductive circuit of the first PCB board.

[0019] The second bus bar welding area and the second conductive area are arranged together to form an electrical connection, or the second bus bar welding area and the second conductive area are electrically connected through a conductive circuit of the first PCB board.

[0020] In one of the embodiments, the second electronic device is a second MOS tube, the second MOS tube is integrated with a controller module, the controller module is used to control the second MOS tube, the second conductive module is a second PCB or other conductive carrier board, the second MOS tube is fixedly installed on the second PCB, the second PCB has a third conductive area and a fourth conductive area insulated and separated, the first electrode of the second MOS tube is electrically connected with the third conductive area, the second electrode of the second MOS tube is electrically connected with the fourth conductive area, and the fourth conductive area is configured as an output end for electrical connection with other photovoltaic components.

[0021] In one of the embodiments, the first electronic device body is a chip with PN poles, the first conductive body is electrically connected with a first surface of the chip to form a first pin, the second conductive body is electrically connected with a second surface of the chip to form a second pin, the first conductive body and the second conductive body are insulated and separated, the first conductive body is provided with a third busbar welding area, and the second conductive body is provided with a fourth busbar welding area.

[0022] In one of the embodiments, the second conductive module is a third PCB, the third PCB is provided with a first conductive area, a second conductive area, a third conductive area, a fourth conductive area, a first busbar welding area and a second busbar welding area, the first busbar welding area and the second busbar welding area are insulated and separated, the third conductive area and the fourth conductive area are insulated and separated, the first conductive area and the second conductive area are insulated and separated, the first busbar welding area is electrically connected with the first conductive area, the second busbar welding area is electrically connected with the second conductive area, the second conductive area and the third conductive area are electrically connected, the first electrode of the first electronic device is electrically connected with the first conductive area, the second electrode of the first electronic device is electrically connected with the second conductive area, the first electrode of the second electronic device is electrically connected with the third conductive area, and the second electrode of the second electronic device is electrically connected with the fourth conductive area, wherein the fourth conductive area is configured as an output end for electrical connection with other photovoltaic components.

[0023] In one of the embodiments, the third PCB is provided with a first via hole and a second via hole, the first conductive area, the second conductive area, the third conductive area, the fourth conductive area, the first busbar welding area and the second busbar welding area are all arranged on the upper surface of the third PCB, a conductive circuit is arranged on the lower surface of the third PCB, the second conductive area is electrically connected with the conductive circuit through the first via hole, and the third conductive area is electrically connected with the conductive circuit through the second via hole, so that the second conductive area and the third conductive area are electrically connected.

[0024] In one of the embodiments, the first conductive area and the first busbar welding area are arranged together to form an electrical connection, and the third conductive area and the second busbar welding area are arranged together to form an electrical connection.

[0025] A junction box assembly comprising junction boxes and the photovoltaic bypass protection and anti-backflow module, the number of junction boxes is at least 1.

[0026] A junction box assembly comprising junction boxes and the photovoltaic bypass protection and anti-backflow module, the number of junction boxes is N+1, the first to the Nth junction boxes are configured to accommodate N groups of first electronic devices with unidirectional conduction performance, the N+1th junction box is configured to accommodate a second electronic device, the first to the Nth junction boxes are electrically connected by a bus bar, and the Nth junction box is electrically connected to the N+1th junction box by a conductor.

[0027] A junction box assembly comprising junction boxes and the photovoltaic bypass protection and anti-backflow module, the number of junction boxes is N, the N junction boxes are configured to accommodate N groups of first electronic devices with unidirectional conduction performance respectively, and the N junction boxes are electrically connected by a bus bar.

[0028] The last junction box in the order is configured to accommodate a second electronic device.

[0029] A junction box assembly comprising junction boxes and the photovoltaic bypass protection and anti-backflow module, the number of junction boxes is M, the M junction boxes are configured to accommodate N groups of first electronic devices with unidirectional conduction performance respectively, and the M junction boxes are electrically connected by a bus bar, wherein M is not equal to N, and the last junction box in the order is configured to accommodate a second electronic device.

[0030] A junction box assembly comprising junction boxes, connectors and the photovoltaic bypass protection and anti-backflow module, the number of junction boxes is L, the L junction boxes are configured to accommodate N groups of first electronic devices with unidirectional conduction performance, the connectors are configured to accommodate a second electronic device, the first to the Lth junction boxes are electrically connected by a bus bar, and the Lth junction box is electrically connected to the connector by a conductor.

[0031] A junction box comprising a box body and a box cover for closing the box body, the box body is configured to be dedicated to placing the photovoltaic bypass protection and anti-backflow module.

[0032] The beneficial effects of the present application are:

[0033] 1. The plurality of first electronic devices of the present application are used to form a traditional bypass module, that is, when a certain battery in a solar cell string is blocked, damaged or performance degraded, the bypass module can provide a low-resistance bypass path for this part of the battery, so that the current continues to flow around the faulty battery, and the second electronic device is used to prevent the current from flowing back in the opposite direction and damaging the circuit.

[0034] 2、The bypass protection module of the application adopts the combination of MOS tube and PCB board, the installation process is simple and convenient, and the disassembly and assembly efficiency is improved.

[0035] 3、The first electronic device and the second electronic device are integrated in the junction box, and the PCB board is used for circuit layout, so that the overall structure is compact and simple, and the second electronic device is convenient for connecting with the external cable, the assembly process of the junction box can be simplified to the maximum extent, the junction box can also effectively protect the second electronic device, and the long-term stable work of the second electronic device is beneficial. At the same time, the cost of the scheme of the application is low.

[0036] 4、The first electronic device and the second electronic device are respectively stored in different junction boxes, so that the rapid heat dissipation of each electronic device is beneficial. Since multiple junction boxes are used, the junction boxes are connected through the bus bars, so that the installation positions of the multiple junction boxes can be flexibly arranged according to the actual installation site.

[0037] 5、The application integrates multiple first electronic devices and second electronic devices and multiple bus bar welding areas on one PCB board, which is beneficial to save space and make the structure compact. It is convenient for rapid disassembly and assembly, and is beneficial to improve the assembly efficiency of the junction box.

[0038] 6、The pitch of the bus bar of many solar cell panels is fixed, so the position of the bus bar perforation should be considered when designing the junction box and the bypass protection module. The scheme of the application realizes PCB board wiring through the setting of the via, which is convenient for the connection of the bus bar and the bypass protection module. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a schematic diagram of the photovoltaic bypass protection and anti-backflow module of the application connected with multiple solar cell strings.

[0040] Figure 2 It is an exploded structural schematic diagram of the first electronic device of one embodiment of the application. The first electronic device in the figure includes a first MOS tube and a first PCB board.

[0041] Figure 3 It is a schematic diagram of the first bus bar welding area and the first conductive area provided on the first PCB board of one embodiment of the application, which realizes electrical connection through the conductive circuit of the first PCB board.

[0042] Figure 4 It is a schematic diagram of the first pin and the second pin of the first MOS tube of one embodiment of the application.

[0043] Figure 5 It is an exploded structural schematic diagram of the first electronic device of one embodiment of the application. The first electronic device in the figure includes a PN pole chip, a first conductive body and a second conductive body.

[0044] Figure 6 The exploded structural schematic diagram of the second electronic device for one embodiment of the present application.

[0045] Figure 7 The schematic diagram of the third pin and the fourth pin of the second MOS tube for one embodiment of the present application.

[0046] Figure 8 The exploded structural schematic diagram of the integration of various components in one junction box for one embodiment of the present application.

[0047] Figure 9 The schematic diagram of the placement of N sets of the first electronic device and the second electronic device in N+1 and the junction box for one embodiment of the present application, wherein the second electronic device is placed in one junction box alone.

[0048] Figure 10 The schematic diagram of the placement of N sets of the first electronic device and the second electronic device in N junction boxes for one embodiment of the present application, wherein the Nth set of the first electronic device and the second electronic device are placed in the same junction box, and the junction box has multiple PCB boards.

[0049] Figure 11 The schematic diagram of the placement of N sets of the first electronic device and the second electronic device in N junction boxes for one embodiment of the present application, wherein the Nth set of the first electronic device and the second electronic device are placed in the same junction box, and the junction box has only one PCB board.

[0050] Figure 12 The schematic diagram of the placement of N sets of the first electronic device and the second electronic device in N junction boxes for one embodiment of the present application, wherein the last junction box has only one PCB board, and the PCB board is provided with a via hole.

[0051] Figure 13 The schematic diagram of the lower surface of the third PCB board provided with a conductive circuit for one embodiment of the present application.

[0052] Figure 14 The schematic diagram of the third PCB board provided with a first via hole and a second via hole for one embodiment of the present application.

[0053] Figure 15 The perspective view of the third PCB board provided with a first via hole and a second via hole for one embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0055] It should be noted that in the description of the utility model, the terms "top", "bottom", "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0056] As shown in Figure 1 and Figure 9 The embodiment of the present application provides a photovoltaic bypass protection and anti-reverse flow module, which is configured to be arranged in a junction box assembly, wherein the junction box assembly can comprise a junction box and a connector, etc., the junction box 100 can comprise a box body 101 and a box cover 102, the photovoltaic bypass protection and anti-reverse flow module comprises N groups of first electronic devices 1 with bypass protection function and one-way conductive performance, wherein N >= 1, for example, N = 1, 3, 5, 10 and the like positive integer. One group of first electronic devices 1 can comprise one or more first electronic devices 1. N groups of first electronic devices 1 are configured to be arranged in the junction box 100 and connected in series with each other, the first electronic device 1 is configured to be connected in parallel with the solar cell sub-string 5, the second electronic device 2 with anti-reverse flow function is configured to be arranged in the junction box 100 and connected in series with N groups of first electronic devices 1, the first electrode of the second electronic device 2 is configured to be electrically connected with the second electrode of the series circuit composed of N groups of first electronic devices 1, and the second electrode of the second electronic device 2 is configured to be connected with an external device, for example, can be electrically connected with an external cable 4.

[0057] In actual use, a plurality of first electronic devices 1 and second electronic devices 2 are installed in the junction box 100, and each first electronic device 1 and the second electronic device 2 are connected in series. Each first electronic device 1 can be connected in parallel with the solar cell sub-string 5, and the second electrode of the second electronic device 2 is electrically connected with the external cable 4. The second electronic device 2 is specially used for preventing reverse flow of current. That is, a plurality of first electronic devices 1 are used to form a conventional bypass module, that is, when some of the solar cell sub-strings 5 are blocked, damaged or performance degraded, the bypass module can provide a low-resistance bypass path for the part of the battery, so that the current continues to flow around the faulty battery, and the current can pass through the second electronic device 2 in the forward direction. At the same time, the second electronic device 2 is also used to prevent reverse current from passing, thereby protecting the circuit.

[0058] On the basis of the above embodiment, as shown in Figure 1As shown, the second electronic device 2 further includes a resistor 23, one end of the resistor 23 is electrically connected with the first electrode of the second electronic device 2, and the other end of the resistor 23 is electrically connected with the second electrode of the second electronic device 2, that is, a resistor 23 is connected in parallel with the second electronic device 2.

[0059] Specifically, in the above embodiment, the first electronic device 1 includes a first electronic device body and a first pin and a second pin fixedly and electrically connected with the first electronic device body, the first pin represents the first electrode of the first electronic device 1, and the second pin represents the second electrode of the first electronic device 1. The second electronic device 2 includes a second electronic device body and a third pin and a fourth pin fixedly and electrically connected with the second electronic device body, the third pin represents the first electrode of the second electronic device 2, and the fourth pin represents the second electrode of the second electronic device 2.

[0060] On the basis of the above embodiment, further, a first conductive module electrically connected with the first electronic device 1 is further included, and the second electronic device 2 further includes a second conductive module electrically connected with the second electronic device 2. By electrically connecting the first conductive module and the second conductive module, the first electronic device 1 and the second electronic device 2 can be connected in series.

[0061] On the basis of the above embodiment, further, the number of the first electronic devices 1 electrically connected with the first conductive module on the first conductive module is one or more. For example, the number of the first electronic devices 1 electrically connected with the first conductive module on the first conductive module is two, three, five, etc.

[0062] The above embodiment of the first electronic device 1 and the first conductive module has multiple forms. For example, as shown in Figure 2 and Figure 4 In one of the embodiments, the first electronic device 1 is a first MOS tube 111, the first MOS tube 111 is integrated with a controller module, the controller module is used for controlling the first MOS tube 111, and the first conductive module is a first PCB board 112 or other carrier board with a conductive function. The first MOS tube 111 is fixedly installed on the first PCB board 112, the first PCB board 112 has a first conductive area 1121 and a second conductive area 1122 insulated from each other, the first electrode (a first pin 1111) of the first MOS tube 111 is electrically connected with the first conductive area 1121, and the second electrode (a second pin 1112) of the first MOS tube 111 is electrically connected with the second conductive area 1122.

[0063] It should be noted that the above first PCB board 112 has the first conductive area 1121 and the second conductive area 1122 insulated from each other means that the first conductive area 1121 and the second conductive area 1122 corresponding to the same first MOS tube 111 are insulated from each other on the first PCB board 112.

[0064] Specifically, one first MOS tube 111 can be arranged on one first PCB board 112, that is, one first PCB board 112 is provided for each first MOS tube 111, and then the first PCB boards 112 are electrically connected, so that the first MOS tubes 111 are connected in series. Alternatively, a plurality of first MOS tubes 111 can be arranged on one first PCB board 112, that is, a plurality of first conductive areas 1121 and second conductive areas 1122 are arranged, and the second conductive area 1122 corresponding to one first MOS tube 111 is electrically connected with the first conductive area 1121 corresponding to another first MOS tube 111, so that the first MOS tubes 111 are connected in series.

[0065] Further, as shown in Figure 2 and Figure 3 , the first PCB board 112 is provided with insulatively isolated first bus bar welding areas 1123 and second bus bar welding areas 1124, the first bus bar welding areas 1123 are arranged together with the first conductive areas 1121 to form electrical connection, or the first bus bar welding areas 1123 are electrically connected with the first conductive areas 1121 through the conductive lines 1126 of the first PCB board 112, and the second bus bar welding areas 1124 are arranged together with the second conductive areas 1122 to form electrical connection, or the second bus bar welding areas 1124 are electrically connected with the second conductive areas 1122 through the conductive lines 1125 of the first PCB board 112.

[0066] Specifically, in the above embodiment, the first bus bar welding areas 1123 and the second bus bar welding areas 1124 are used for welding the bus bar of the assembly.

[0067] In one embodiment, as shown in Figure 5 , the first electronic device body is a chip 121 with PN poles, the first conductive body 1221 is electrically connected with a first surface of the chip 121 to form the first pin 1111, the second conductive body 1222 is electrically connected with a second surface of the chip 121 to form the second pin 1112, the first conductive body 1221 and the second conductive body 1222 are insulatively isolated, the first conductive body 1221 is provided with a third bus bar welding area 1223, and the second conductive body 1222 is provided with a fourth bus bar welding area 1224.

[0068] Specifically, in the above embodiment, the connection mode of the two adjacent first electronic devices 1 can be that the second pin 1112 of one first electronic device 1 is electrically connected with the first pin 1111 of another first electronic device 1. The third bus bar welding area 1223 and the fourth bus bar welding area 1224 are used for welding the bus bar of the assembly.

[0069] The implementation modes of the above second electronic device 2 and the second conductive module are various, for example, as shown inFigure 6 and Figure 7 As shown in FIG. 2, in one embodiment, the second electronic device 2 is a second MOS tube 21, the second MOS tube 21 is integrated with a controller module for controlling the second MOS tube 21, the second conductive module is a second PCB board 22 or other conductive carrier board, the second MOS tube 21 is fixedly installed on the second PCB board 22, the second PCB board 22 has an insulatively isolated third conductive area 221 and a fourth conductive area 222, the first electrode (third pin 211) of the second MOS tube 21 is electrically connected with the third conductive area 221, the second electrode (fourth pin 212) of the second MOS tube 21 is electrically connected with the fourth conductive area 222, and the fourth conductive area 222 is configured as an output end for electrically connecting with other photovoltaic components, for example, can be electrically connected with the external cable 4.

[0070] Specifically, in the above embodiment, the third conductive area 221 on the second PCB board 22 can be electrically connected with the adjacent first PCB board 112 through a cable to realize the series connection of the second MOS tube 21 and each first MOS tube 111. Alternatively, the third conductive area 221 on the second PCB board 22 can be electrically connected with the adjacent second conductive body 1222 through a cable.

[0071] In one embodiment, as shown in FIG. 3, the first electronic device 1 is a first MOS tube 111, the second electronic device 2 is a second MOS tube 21, and the third electronic device 3 is a third MOS tube 31. Figure 11 and Figure 12 As shown in FIG. 4, the third PCB board 3 is provided with a first conductive area 1121, a second conductive area 1122, a third conductive area 221, a fourth conductive area 222, a first busbar welding area 1123, and a second busbar welding area 1124. The first busbar welding area 1123 and the second busbar welding area 1124 are insulatively isolated, the third conductive area 221 and the fourth conductive area 222 are insulatively isolated, the first conductive area 1121 and the second conductive area 1122 are insulatively isolated, the first busbar welding area 1123 is electrically connected with the first conductive area 1121, the second busbar welding area 1124 is electrically connected with the second conductive area 1122, the second conductive area 1122 and the third conductive area 221 are electrically connected, the first electrode of the first electronic device 1 is electrically connected with the first conductive area 1121, the second electrode of the first electronic device 1 is electrically connected with the second conductive area 1122, the first electrode of the second electronic device 2 is electrically connected with the third conductive area 221, the second electrode of the second electronic device 2 is electrically connected with the fourth conductive area 222, and the fourth conductive area 222 is configured as an output end for electrically connecting with other photovoltaic components, for example, can be electrically connected with the external cable 4.

[0072] In the above embodiment, the first electronic device 1 and the second electronic device 2 can be mounted on the same third PCB 3. For example, when the first electronic device 1 is a first MOS tube 111, and the second electronic device 2 is a second MOS tube 21, the first MOS tube 111 and the second MOS tube 21 can be mounted on the third PCB 3.

[0073] It can be understood that when the number of the first MOS tubes 111 is multiple, the number of the first conductive areas 1121, the second conductive areas 1122, the first busbar soldering areas 1123 and the second busbar soldering areas 1124 on the third PCB 3 is also multiple, and each of the first conductive areas 1121, the second conductive areas 1122, the first busbar soldering areas 1123 and the second busbar soldering areas 1124 is matched with one of the first MOS tubes 111.

[0074] Specifically, the first conductive areas 1121 and the first busbar soldering areas 1123 can be electrically connected by a conductive circuit, and the second conductive areas 1122 and the third conductive areas 221 can also be electrically connected by a conductive circuit.

[0075] Further, on the basis of the above embodiment, as shown in Figures 12 to 15 the third PCB 3 is provided with a first via hole 321 and a second via hole 322, the first conductive areas 1121, the second conductive areas 1122, the third conductive areas 221, the fourth conductive areas 222, the first busbar soldering areas 1123 and the second busbar soldering areas 1124 are arranged on the upper surface of the third PCB 3, the conductive circuit 31 is arranged on the lower surface of the third PCB 3, the second conductive areas 1122 are electrically connected with the conductive circuit 31 through the first via hole 321, and the third conductive areas 221 are electrically connected with the conductive circuit 31 through the second via hole 322, so that the second conductive areas 1122 and the third conductive areas 221 are electrically connected.

[0076] It can be understood that in the above embodiment, when the number of the first conductive areas 1121, the second conductive areas 1122, the first busbar soldering areas 1123 and the second busbar soldering areas 1124 on the third PCB 3 is multiple, the different conductive areas can also be electrically connected by arranging via holes and corresponding conductive circuits on the third PCB 3.

[0077] In the above embodiment, further, the first conductive areas 1121 and the first busbar soldering areas 1123 are arranged together to form an electrical connection, and the third conductive areas 221 and the second busbar soldering area 1124 closest to the third conductive areas 221 are arranged together to form an electrical connection.

[0078] One embodiment of the present application also provides a terminal box assembly, which comprises a terminal box 100, as shown in Figure 8As shown, the number of the junction boxes 100 is 1. That is, in actual installation and use, all the components are integrated in one junction box 100. In this way, the overall structure is very compact, and it is convenient to assemble with external devices. The occupied space is small.

[0079] One embodiment of the present application also provides a junction box assembly, as shown in Figure 9 As shown, it includes the junction boxes 100 and the above-mentioned photovoltaic bypass protection and anti-reverse flow module, the number of the junction boxes 100 is N+1, the first to the Nth junction boxes 100 are configured to accommodate N groups of the first electronic devices with unidirectional conduction performance, the N+1th junction box 100 is configured to accommodate the second electronic device, the first to the Nth junction boxes 100 are electrically connected through the bus bar, the Nth junction box 100 and the N+1th junction box 100 are electrically connected through a conductor, and the conductor can be a cable or the like.

[0080] Specifically, in the above-mentioned embodiment, in actual installation and use, the first to the Nth junction boxes 100 are used to respectively place N groups of the first electronic devices 1, and the last junction box 100 arranged in order, that is, the N+1th junction box 100 is used to place the second electronic device 2. For example, the N+1th junction box 100 does not have any first electronic device 1, and only has the second electronic device 2.

[0081] In one embodiment, as shown in Figure 10 The number of the junction boxes 100 is N, N junction boxes 100 are configured to accommodate N groups of the first electronic devices 1 with unidirectional conduction performance, N junction boxes 100 are electrically connected through the bus bar, and the last junction box 100 arranged in order is configured to accommodate the second electronic device 2.

[0082] Specifically, in the above-mentioned embodiment, the last junction box 100 arranged in order is installed with the Nth group of the first electronic devices 1 and the second electronic device 2.

[0083] In one embodiment, as shown in Figure 11 and Figure 12As shown, the number of the junction boxes 100 is N, the N junction boxes 100 are configured to accommodate N groups of the first electronic devices 1 respectively, the N junction boxes 100 are electrically connected through the bus bars, the second electronic device 2 is installed in the last junction box 100 arranged in sequence, and the junction box 100 where the second electronic device 2 is located further comprises a third PCB board, the third PCB board 3 is provided with a first conductive area 1121, a second conductive area 1122, a third conductive area 221, a fourth conductive area 222, a first bus bar welding area 1123 and a second bus bar welding area 1124, the first bus bar welding area 1123 and the second bus bar welding area 1124 are insulated and separated, the third conductive area 221 and the fourth conductive area 222 are insulated and separated, the first conductive area 1121 and the second conductive area 1122 are insulated and separated, the first bus bar welding area 1123 is electrically connected with the first conductive area 1121, the second bus bar welding area 1124 is electrically connected with the second conductive area 1122, the second conductive area 1122 is electrically connected with the third conductive area 221, the first electrode of the first electronic device 1 is electrically connected with the first conductive area 1121, the second electrode of the first electronic device 1 is electrically connected with the second conductive area 1122, the first electrode of the second electronic device 2 is electrically connected with the third conductive area 221, the second electrode of the second electronic device 2 is electrically connected with the fourth conductive area 222, and the fourth conductive area 222 is configured as an output end for electrical connection with other photovoltaic components, for example, electrical connection with an external cable 4.

[0084] Specifically, in the above embodiment, the last junction box 100 arranged in sequence is provided with the Nth group of the first electronic devices 1 and the second electronic device 2, and both the Nth group of the first electronic devices 1 and the second electronic device 2 are installed on the third PCB board 3. It can be understood that when the Nth group of the first electronic devices 1 comprises a plurality of first electronic devices 1, the number of the first conductive area 1121, the second conductive area 1122, the first bus bar welding area 1123 and the second bus bar welding area 1124 on the third PCB board 3 is a plurality, and is matched with each first electronic device 1.

[0085] One embodiment of the present application further provides a junction box assembly comprising the junction box 100 and the photovoltaic bypass protection and anti-reverse flow module, the number of the junction boxes 100 is M, the M junction boxes 100 are configured to accommodate N groups of the first electronic devices 1 respectively, the M junction boxes 100 are electrically connected through the bus bars, wherein M is not equal to N, and the last junction box 100 arranged in sequence is configured to accommodate the second electronic device 2.

[0086] In the above embodiment, M can be greater than N, or M can be less than N. One group of the first electronic devices 1 can be placed in each junction box 100, or a plurality of groups of the first electronic devices 1 can be placed.

[0087] One embodiment of the present application also provides a junction box assembly, which comprises L junction boxes 100 configured to accommodate N groups of first electronic devices 1 with unidirectional conduction performance, a connector configured to accommodate second electronic devices 2, and the photovoltaic bypass protection and anti-backflow module as described above, wherein the first to Lth junction boxes 100 are electrically connected through bus bars, and the Lth junction box 100 is electrically connected to the connector through a conductor, which can be a cable or the like.

[0088] It should be noted that L and N can be equal or not equal, that is, L can be greater than N or less than N.

[0089] One embodiment of the present application also provides a junction box 100, which comprises a box body 101 and a box cover 102 for closing the box body 101, and the box body 101 is configured to be used for placing the photovoltaic bypass protection and anti-backflow module as described above.

[0090] Specifically, the box body 101 can be provided with a support structure, a positioning structure or the like for mounting and fixing the photovoltaic bypass protection and anti-backflow module.

[0091] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A photovoltaic bypass protection and anti- reverse current module, characterized in that, The photovoltaic bypass protection and anti-backflow module configured to be arranged in the junction box assembly comprises: N groups of first electronic devices (1) with bypass protection function and unidirectional conduction performance, wherein N≥1, the N groups of first electronic devices (1) are connected in series with each other, and the first electronic device (1) is configured to be connected in parallel with the solar cell sub-string (5), a second electronic device (2) with anti-backflow function, the second electronic device (2) being connected in series with the N groups of first electronic devices (1), a first electrode of the second electronic device (2) being configured to be electrically connected with a second electrode of a series circuit composed of the N groups of first electronic devices (1).

2. The photovoltaic bypass protection and anti- reverse current module of claim 1, wherein, Further comprising a resistor (23), one end of the resistor (23) being electrically connected with the first electrode of the second electronic device (2), and the other end of the resistor (23) being electrically connected with the second electrode of the second electronic device (2).

3. The photovoltaic bypass protection and anti-backflow module according to claim 1, wherein the first electronic device (1) comprises a first electronic device body and a first pin (1111) and a second pin (1112) electrically connected with the first electronic device body, the first pin (1111) representing a first electrode of the first electronic device (1), and the second pin (1112) representing a second electrode of the first electronic device (1), the second electronic device (2) comprises a second electronic device body and a third pin (211) and a fourth pin (212) electrically connected with the second electronic device body, the third pin (211) representing a first electrode of the second electronic device (2), and the fourth pin (212) representing a second electrode of the second electronic device (2).

4. The photovoltaic bypass protection and anti- reverse current module of claim 3, wherein, Further comprising a first conductive module for electrically connecting with the first electronic device (1) and a second conductive module for electrically connecting with the second electronic device (2), and the number of the first electronic devices (1) electrically connected on the first conductive module is one or more.

5. The photovoltaic bypass protection and anti- reverse current module of claim 4, wherein, the first electronic device (1) is a first MOS tube (111), the first MOS tube (111) is integrated with a controller module for controlling the first MOS tube, the first conductive module is a first PCB board (112) or other conductive carrier board, the first MOS tube (111) is fixedly installed on the first PCB board (112), the first PCB board (112) has a first conductive area (1121) and a second conductive area (1122) insulated and separated from each other, a first electrode of the first MOS tube (111) is electrically connected with the first conductive area (1121), and a second electrode of the first MOS tube (111) is electrically connected with the second conductive area (1122).

6. The photovoltaic bypass protection and anti- reverse current module of claim 5, wherein, the first PCB board (112) is provided with a first bus ribbon welding area (1123) and a second bus ribbon welding area (1124) insulated and separated from each other, the first bus ribbon welding area (1123) and the first conductive area (1121) are arranged together to form an electrical connection, or the first bus ribbon welding area (1123) and the first conductive area (1121) are electrically connected through a conductive circuit (1126) of the first PCB board (112), The second busbar welding area (1124) is arranged with the second conductive area (1122) to form an electrical connection, or the second busbar welding area (1124) and the second conductive area (1122) are electrically connected through the conductive circuit (1125) of the first PCB (112).

7. The photovoltaic bypass protection and anti- reverse current module of claim 4, wherein, The second electronic device (2) is a second MOS tube (21), the second MOS tube (21) is integrated with a controller module, the controller module is used for controlling the second MOS tube, the second conductive module is a second PCB (22) or other conductive carrier board, the second MOS tube (21) is fixedly installed on the second PCB (22), the second PCB (22) has an insulatively isolated third conductive area (221) and a fourth conductive area (222), a first electrode of the second MOS tube (21) is electrically connected with the third conductive area (221), a second electrode of the second MOS tube (21) is electrically connected with the fourth conductive area (222), and the fourth conductive area (222) is configured as an output end and used for electrical connection with other photovoltaic components.

8. The photovoltaic bypass protection and anti- reverse current module of claim 3, wherein, The first electronic device body is a chip (121) with PN poles, a first conductive body (1221) is electrically connected with a first surface of the chip (121) to form a first pin, and a second conductive body (1222) is electrically connected with a second surface of the chip (121) to form a second pin. The first conductive body (1221) and the second conductive body (1222) are insulatively isolated. The first conductive body (1221) is provided with a third busbar welding area (1223), and the second conductive body (1222) is provided with a fourth busbar welding area (1224).

9. The photovoltaic bypass protection and anti- reverse current module of claim 3, wherein, The third PCB (3) is provided with a first conductive area (1121), a second conductive area (1122), a third conductive area (221), a fourth conductive area (222), a first busbar welding area (1123) and a second busbar welding area (1124), The first conductive area (1121) and the second conductive area (1122) are insulatively isolated, The first busbar welding area (1123) is electrically connected with the first conductive area (1121), The second busbar welding area (1124) is electrically connected with the second conductive area (1122), The second conductive area (1122) and the third conductive area (221) are electrically connected, The first electrode of the first electronic device (1) is electrically connected with the first conductive area (1121), and the second electrode of the first electronic device (1) is electrically connected with the second conductive area (1122), The first electrode of the second electronic device (2) is electrically connected with the third conductive area (221), and the second electrode of the second electronic device (2) is electrically connected with the fourth conductive area (222), and the fourth conductive area (222) is configured as an output end and used for electrical connection with other photovoltaic components.

10. A junction box assembly characterized by, The photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 9, wherein the number of junction boxes (100) is at least one.

11. A junction box assembly characterized by, The photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 8, wherein the number of junction boxes (100) is N+1, the first to Nth junction boxes (100) are configured to accommodate N groups of first electronic devices (1) having unidirectional conduction performance, the N+1th junction box (100) is configured to accommodate the second electronic device (2), the first to Nth junction boxes (100) are electrically connected by the bus bar, and the Nth junction box (100) is electrically connected to the N+1th junction box (100) by a conductor.

12. A junction box assembly characterized by, The photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 9, wherein the number of junction boxes (100) is N, the N junction boxes (100) are configured to accommodate N groups of first electronic devices (1) having unidirectional conduction performance respectively, and the N junction boxes (100) are electrically connected by the bus bar. The last junction box (100) in the sequence is configured to accommodate the second electronic device (2).

13. A junction box assembly characterized by, The photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 9, wherein the number of junction boxes (100) is M, the M junction boxes (100) are configured to accommodate N groups of first electronic devices (1) having unidirectional conduction performance respectively, the M junction boxes (100) are electrically connected by the bus bar, M is not equal to N, and the last junction box (100) in the sequence is configured to accommodate the second electronic device (2).

14. A junction box assembly characterized by, The photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 8, wherein the number of junction boxes (100) is L, the L junction boxes (100) are configured to accommodate N groups of first electronic devices (1) having unidirectional conduction performance, the connector is configured to accommodate the second electronic device (2), the first to Lth junction boxes (100) are electrically connected by the bus bar, and the Lth junction box (100) is electrically connected to the connector by a conductor.

15. A terminal box comprising a box body (101) and a box cover (102) for closing the box body (101), characterized in that The box body (101) is configured to be dedicated to placing the photovoltaic bypass protection and anti-backflow module according to any one of claims 1 to 9.

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