WO2015010245A1

WO2015010245A1 - Micro-inverter, photovoltaic module and photovoltaic module system

Info

Publication number: WO2015010245A1
Application number: PCT/CN2013/079866
Authority: WO
Inventors: 孙创成; 倪健
Original assignee: 浙江昱辉阳光能源有限公司
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2015-01-29

Abstract

A micro-inverter, a photovoltaic module and a photovoltaic module system. The micro-inverter is provided with a housing, an AC output connector and a DC input connector, wherein the housing is provided with mounting holes; the AC output connector and the DC input connector are located at respective mounting holes, and the connecting wires of the two connectors and a printing circuit board in the housing are located in the housing of the micro-inverter. Both the AC output connector and the DC input connector of the micro-inverter are located at the mounting holes, i.e. the micro-inverter has no external conductor, so that there is no need to wind and package the external conductor in the process of transport packaging, thereby improving efficiency; and when the micro-inverter has no external conductor to be installed to a photovoltaic module, the connecting wire between the micro-inverter and a junction box and the connecting wire between the micro-inverters can be used according to an actual demand, thereby saving material costs. In addition, such a design can also prevent rainwater from leaking onto the printing circuit board provided with electronic components in the housing of the micro-inverter.

Description

Micro inverters and photovoltaic modules, photovoltaic module systems

The present invention relates to the field of photovoltaic technology, and in particular to a micro inverter and a photovoltaic module and a photovoltaic module system. Background technique

Solar photovoltaic modules generate direct current through the photovoltaic effect, while ordinary electrical equipment and power are usually transmitted as alternating current. Therefore, when the PV module is installed and used, an inverter is generally provided for converting the DC power outputted by the PV module into a local AC power of the user. Micro inverters, as one of the inverters, have their own unique advantages.

Please refer to Figure 1 and Figure 2, Figure 1 is a schematic diagram of a typical micro-inverter structure; Figure 2 is a schematic diagram of the installation of several PV modules.

The micro-inverter 10 includes a mounting board 12, an AC output connection terminal for connecting an internal circuit board, a DC input connection terminal, and a DC female connector 131 connected to an external component, a DC male connector 133, and an AC female connector. The connector 141 and the AC male connector 143, the DC input connection terminal and the DC connector are connected by a DC wire 132, and the AC output connection terminal and the AC connector are connected by an AC wire 142. The housing 11 of the transformer 10 is configured to interface with external components.

The photovoltaic module 20 has a junction box 201. The DC input connector of the micro-inverter 10 is connected to the junction box 201. The DC power generated by the PV module 20 is connected to the micro-inverter 10 through the junction box 201, and is converted into an AC power and then connected via an AC output. Output. In order to obtain a certain amount of electricity, a plurality of photovoltaic modules 20 are usually used in series, and in this case, the micro inverters 10 connected to the respective photovoltaic modules 20 need to be connected in parallel.

The structure of the above micro-inverter 10 has the following drawbacks:

The DC female connector 131, the DC male connector 133, the AC female connector 141, and the AC male connector 143 of the micro-inverter 10 are all disposed outside the casing 11 and have a long wiring. In the first embodiment, the DC electric wire 132 and the AC electric wire 142 are both extended outside the casing 11. This causes the micro-inverter 10 to consume manpower and material force to wrap the package during the packaging and transportation process. Moreover, the length of the wiring extending out of the casing 11 is a fixed value at the time of shipment, in order to prevent the wiring from being short and cannot be adapted to the actual working condition, the length of the wiring is processed to be too long, resulting in high cost.

In addition, as shown in Figure 2, the assembly process of several photovoltaic modules 20 is as follows:

At the installation site, the photovoltaic module 20 and the micro-inverter 10 are respectively mounted to the mounting bracket 21;

The DC female connector 131 and the DC male connector 133 of the micro-inverter 10 are connected to the positive and negative terminals of the junction box 201, and the AC female connector 141 communicates with the adjacent one of the micro-inverters 10 The male connector 143 is connected, and its AC male connector 143 is connected to the AC female connector 141 of the next next micro-inverter 10. One terminal of a string of micro-inverters 10 is connected to the grid, and the other terminal is sealed with an end cap.

The installation of the above photovoltaic module 20 has the following technical problems:

First, the installation process of the photovoltaic module 20 is cumbersome. At the installation site, it is necessary to mount a plurality of micro inverters 10 to the mounting bracket 21, and then insert the connectors, and the installation cost is high.

Second, each micro-inverter 10 needs to be plugged into four connectors, and the installation efficiency is low. Moreover, for a site with limited installation space, such as installing a photovoltaic module 20 on a roof, the space between the photovoltaic module 20 and the roof is narrow, and four connectors are interposed for each micro-inverter 10, which is difficult to operate.

In view of this, how to simplify the structure of the micro-inverter, reduce the transportation package and the processing cost are technical problems to be solved by those skilled in the art. Summary of the invention

In order to solve the above technical problems, the present invention provides a micro-inverter and a photovoltaic module, a photovoltaic module system, which can reduce transportation packaging and processing costs.

The micro inverter provided by the present invention has a housing, and an AC output connector and a DC input connector, the housing is provided with a mounting hole, and the AC output connector and the DC input connector are located at corresponding places At the mounting hole, the AC output connector and the DC input connector and the wiring of the internal printed circuit board of the housing are located in the housing of the micro inverter.

The AC output connector and the DC input connector of the micro-inverter are located at the mounting hole, that is, the micro-inverter has no external wires. In the process of transportation and packaging, there is no need to wrap the external wires. Improve efficiency; Moreover, when there is no external wiring, when installing to the PV module, the wiring between the micro inverter and the junction box and the wiring between the micro inverters can be used according to actual needs, thereby saving material cost. In addition, this design also prevents rainwater from penetrating from the wiring to the printed circuit board on which the electronic components are mounted in the micro-inverter housing.

Preferably, the side wall of the housing is provided with an inner recess, and the mounting hole for mounting the direct current input connector and/or the alternating current output connector is located at the inner recess;

One side of the housing has an opening, and the micro-inverter further includes a cover that covers the open of the housing; the cover covers the inner portion.

Preferably, the micro-inverter further has a connection ear plate, and the micro-inverter is fixed on the frame of the photovoltaic module or the mounting bracket of the assembled photovoltaic component through the connection ear plate.

The present invention also provides a photovoltaic module having a frame, further comprising the micro-inverter of the above item 1 or 2, the micro-inverter being disposed on a back surface of the photovoltaic module and fixed to the photovoltaic module The border.

In this way, the micro-inverter is installed, and the micro-inverter is installed on the photovoltaic module when the photovoltaic module is shipped from the factory. When the photovoltaic module system is installed in the field, it is not necessary to install the micro-reverse for each photovoltaic component on the mounting bracket. Transformers simplify installation steps, increase installation efficiency, and reduce installation costs. Moreover, the micro-inverter is installed at the factory, and has sufficient space and field of view when it is assembled from the factory. Compared with the on-site installation, it obviously improves the installation reliability of the micro-inverter, thus ensuring the running performance of the photovoltaic module system. In addition, the DC input connector of the micro-inverter can be directly connected to the junction box of the corresponding PV module, and the installation is not required in the field installation, which further simplifies the installation procedure.

Preferably, the micro inverter is fixed at a corner of the frame.

Preferably, the micro-inverter has a connecting ear plate corresponding to two sides of the frame corner, and the micro-inverter is fixed to the frame by the connecting ear plate.

Preferably, the two sides of the connecting lug and the corner of the frame are respectively provided with corresponding mounting holes, and the connecting lug and the frame are fixed by bolts, rivets or pins inserted into the mounting holes. .

Preferably, the micro-inverter has a predetermined gap between the backplane of the photovoltaic module. The invention also provides a photovoltaic module system comprising a photovoltaic component and assembling a plurality of said photovoltaics The mounting bracket of the component further includes a micro-inverter disposed on a back surface of the photovoltaic module or disposed on the mounting bracket, and the micro-inverter is the micro-inverter according to any one of the above.

Since the micro-inverter has the above technical effects, the photovoltaic module system has the same technical effect.

Preferably, the bus further includes a bus, the bus is disposed along the mounting bracket, and the AC output connectors of the micro-inverters of each of the photovoltaic modules are connected to the bus to connect the micro-inverters in parallel Device.

Preferably, the utility model further includes a branch line corresponding to each of the micro inverters, wherein the bus line is provided with a bus connector corresponding to each of the micro inverters; and two ends of the branch line are respectively provided with a first branch line connector And a second branch connector, the first branch connector is connected to the corresponding AC output connector of the micro inverter, and the second branch connector is connected to the bus connector.

Preferably, the two mounting brackets are included, one of the mounting brackets is located at an upper portion of the photovoltaic module, and the other of the mounting brackets is located at a lower portion of the photovoltaic module, and the bus is disposed at an upper portion of the photovoltaic module. The mounting bracket; the junction box of the photovoltaic module is located at an upper portion of the photovoltaic module, and the micro inverter is fixed to an upper side of the frame of the photovoltaic module. DRAWINGS

Figure 1 is a schematic view showing the structure of a typical micro inverter;

Figure 2 is a schematic view showing the assembly of several photovoltaic modules;

3 is a schematic structural view of a specific embodiment of a photovoltaic module system according to the present invention; FIG. 4 is a partial enlarged view of a portion C of FIG. 3;

Figure 5 is a schematic view showing the structure of a micro-inverter mounted on a frame of a photovoltaic module;

Figure 6 is a front elevational view of the micro-inverter of Figure 5;

Figure 7 is an exploded view of the micro-inverter of Figure 6;

Figure 8 is a rear elevational view of the micro-inverter of Figure 6;

Figure 9 is a cross-sectional view taken along line A-A of Figure 6;

Figure 10 is a cross-sectional view of the frame;

Figure 11 is a schematic structural view of the upper right corner of the photovoltaic module of Figure 5;

12 is a schematic structural view of the photovoltaic module of FIG. 5; Figure 13 is a partial enlarged view of the portion B of Figure 12;

Figure 14 is a front elevational view of yet another micro-inverter.

Fig. 15 is a structural schematic view showing a specific embodiment of a micro inverter mounted on a mounting bracket; Fig. 16 is a rear elevational view of Fig. 15. Figure 1-2:

10 micro inverter, 11 housing, 12 mounting plate, 131 DC female connector, 132 DC wire, 133 DC male connector, 141 AC female connector, 142 AC cable, 143 AC male connector, 20 PV modules, 201 junction box, 21 mounting bracket

In Figure 3-16:

30 micro inverter, 31 housing, 311 connection ear plate, 311a ear plate mounting hole, 312 mounting hole, 32 cover, 321 tin foil, 33 printed circuit board, 34 AC output connector, 35 DC input connector, 36 light guide, 37 silicone, 40 PV modules, 401 frame, 401a frame mounting hole, 402 junction box, 402a DC cable, 403 back panel, 50 mounting bracket, 60 bus, 601 bus connector, 70 branch line, 701 first Branch line connector, 702 second branch line connector

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 3-8. FIG. 3 is a schematic structural view of a specific embodiment of a photovoltaic module system according to the present invention; FIG. 4 is a partially enlarged schematic view of a portion C of FIG. 3; Figure 6 is a front view of the micro-inverter of Figure 5; Figure 7-8 is understood, Figure 7 is an exploded view of the micro-inverter of Figure 6; Figure 8 is a micro-inverter of Figure 6 Rear view, that is, a view of one side of the back panel after installation.

The photovoltaic module system is formed from a plurality of photovoltaic modules 40 that are connected in parallel, and the plurality of photovoltaic modules 40 are generally assembled by mounting brackets 50 at the mounting locations. The photovoltaic module 40 in this embodiment has a frame 401 which generally functions as a battery panel for fixing the photovoltaic module 40. The photovoltaic assembly 40 also includes a micro-inverter 30 that converts the direct current obtained by the photovoltaic assembly 40 into alternating current for use by a user. Each photovoltaic module 40 has a junction box 402 for outputting direct current, a micro inverter 30 having an alternating current output connector 34 for outputting alternating current, and a direct current input connector 35 for inputting direct current, and a direct current input connector 35 connected to the photovoltaic The junction box 402 of the assembly 40, the AC output connectors 34 of each of the photovoltaic modules 40 micro-inverters 30 are sequentially connected in parallel, and the alternating current is collectively output.

In this embodiment, the AC output connector 34 of the micro-inverter 30 and the DC input connector

35 are mounted on the housing 31 of the micro-inverter 30, and the AC output connector 34 and the DC input connector 35 are connected by wires to a printed circuit board 33 in which the electronic components are mounted in the micro-inverter 30. As shown in FIGS. 7 and 8, the housing 31 is provided with mounting holes, and the AC output connector 34 and the DC input connector 35 are both mounted at respective mounting holes and extend out of the mounting holes for corresponding other connectors. And the connector only protrudes from the mounting hole, that is, at the mounting hole, and does not bring out the wiring. The wiring of the AC output connector 34 and the DC input connector 3 and the printed circuit board 33 are all located in the housing of the micro inverter 30. The interior of 31. In this way, cost can be saved and rainwater can be prevented from penetrating from the wiring to the printed circuit board 33 on which the electronic components are mounted.

The AC output connector 34 and the DC input connector 35 of the micro-inverter 30 are located at the mounting holes, i.e., the micro-inverter 30 has no external wires. In the process of transportation and packaging, there is no need to wrap the external wires to improve the efficiency; Moreover, when there is no external wire, when installing to the photovoltaic module 40, the wiring and phase between the micro inverter 30 and the junction box 402 can be used according to actual needs. The wiring between the adjacent micro-inverters 30 saves material costs.

Please refer to FIG. 7 and understand with reference to FIG. 9, which is a cross-sectional view taken along line A-A of FIG.

The micro-inverter 30 includes a cover 32, a housing 31, a printed circuit board 33, and electronic components, and a light guide 36 for displaying the operational state of the micro-inverter 30 may be provided. A printed circuit board 33 containing electronic components is placed in the housing 31, and the housing 31 has an opening, and the cover 32 covers the housing 31 to form a sealed cavity. The cover body 32 is provided with a potting hole, and the potting hole cover is provided with tin foil 321 . The formation process of the micro-inverter 30 can be as follows:

The printed circuit board 33 and the electronic components are bolted to the mounting post of the housing 31; the DC input connector 35 and the AC output connector 34 are mounted to the corresponding mounting holes of the housing 31, and the connector can be extended Outside the mounting hole for connection to external components;

The DC input connector 35 and the AC output connector 34 are connected to the printed circuit board 33 and the corresponding positions of the electronic components through wires; The cover body 32 covers the housing 31, and the sealing surface of the cover body 32 and the housing 31 can be coated with a sealant and fastened by screws;

The silicone rubber 37 is poured into the inside of the casing 31 from the filling hole of the cover body 32, so that the silicone rubber 37 enters the space between the lid body 32 and the casing 31, and the internal components such as the printed circuit board 33 and electronic components are filled. All voids except.

The design makes the micro-inverter 30 have better waterproof and thermal conductivity effects.

As shown in FIGS. 7 and 8, the side wall of the casing 31 is recessed to form an inner recess. The mounting hole for mounting the DC input connector 35 is disposed in the inner recess, and the direct current input connector 35 can be directly inserted into the inner recess. The mounting hole is thus in the recessed position, and after the cover 32 covers the housing 31, the cover 32 also covers the inner recess. After installation, the DC input connector 35 is hidden from the back side of the micro-inverter 30, preventing rainwater from penetrating from here to the printed circuit board 33 on which the electronic component is mounted, while making the DC input connector 35 more Reliable and prevent loosening. The other side wall of the housing 31 can directly machine the mounting holes of the AC output connector 34, and the DC input connector 35 and the AC output connector 34 can be located at the adjacent side walls of the housing 31. It can be understood that, under the premise of rationally designing the printed circuit board 33, the other side wall of the casing 31 can also process the inner concave portion. The mounting hole of the alternating current output connector 34 is disposed in the inner concave portion, and the alternating current output connector 34 is provided. The cover 32 can be hidden in the manner of the DC input connector 35 described above, achieving the same technical effect.

For ease of connection, the mounting holes of the AC output connector 34 and the DC input connector 35 are disposed on the two side walls of the housing 31. It is understood that it is also possible to provide the same side wall, and it is necessary to combine the internal wiring arrangement design.

Please refer to FIG. 10-13, FIG. 10 is a cross-sectional view of the frame; FIG. 11 is a schematic structural view of the photovoltaic module in the upper right corner of FIG. 5; FIG. 12 is a structural schematic view of the photovoltaic module of FIG. Zoom in on the schematic.

In this embodiment, the micro-inverter 30 of the photovoltaic module 40 is disposed on the back side of the photovoltaic module 40, and the open-type inverter 30 is fixed to the bezel 401 of the photovoltaic module 40. The photovoltaic module 40 panel is located on the front side to generate a photovoltaic effect to form a direct current, and the junction box 402 is generally mounted on the back panel 403 of the photovoltaic module 40 to output the generated direct current, so that the microinverter 30 is disposed on the back side. In order to connect the junction box 402. Additionally, the micro-inverter 30 is directly attached to the bezel 401 of the photovoltaic module 40. As shown in FIG. 5, the micro-inverter 30 is fixed to the upper right corner of the bezel 401. Referring to FIG. 3, the micro-inverter 30 is arranged in this manner, and the micro-inverter 30 is installed on the photovoltaic module 40 when the photovoltaic module 40 is shipped from the factory. When the PV module system is installed in the field, it is not necessary to install. A micro-inverter 30 is mounted on each of the photovoltaic modules 40 on the bracket 50, thereby simplifying the installation steps, improving installation efficiency, and reducing installation costs. Moreover, the micro-inverter 30 is installed at the time of shipment from the factory, and has sufficient space and field of view when assembled from the factory. Compared with the on-site installation, the installation reliability of the micro-inverter 30 is obviously improved, thereby ensuring the operation performance of the photovoltaic module system. . In addition, the DC input connector 35 of the micro-inverter 30 can be directly connected to the junction box 402 of the corresponding photovoltaic module 40 at the time of shipment, and no need to be connected during field installation, further simplifying the installation procedure.

As a preferred solution, the micro-inverter 30 can be fixed at the corner of the frame 401. The micro-inverter 30 shown in FIG. 5 is mounted on the upper right corner of the frame 401. Actually, it is installed in the upper left corner, the lower left corner or The bottom right corner is feasible. When disposed at the corners, it is not easy to interfere with other members; and, the corners are formed by two adjacent sides of the frame 401, and the micro-inverter 30 can be fixed with the two sides to ensure the fixing effect. It can be understood that the micro-inverter 30 is not disposed at the corners, but at other positions, and is fixed to one side of the frame 401 to achieve the purpose of positioning.

On the basis of this, the micro-inverter 30 can have a connecting ear plate 311 corresponding to the two sides of the corner of the frame 401. As shown in FIG. 5, the micro-inverter 30 can be fixed to the frame 401 through the connecting ear plate 311. .

The upper portion of the bezel 401 in FIG. 10 (corresponding to the front surface of the photovoltaic module 40) has a gap 401c at which the cell, glass, and EVA film of the photovoltaic module 40 are stuck, and the back plate 403 generally serves as the back surface of the photovoltaic module 40. Then, the back plate 403 is disposed on the bottom surface 401b of the gap 401c. The lower portion of the frame 401 has a frame body 401a extending a certain length along the back surface of the photovoltaic module 40. The connection ear plate 311 can be fixed to the frame body 401a. As can be seen from FIG. 10, the frame body 401a and the bottom surface 401b of the card loading back plate 403 are There is a certain distance between the distances of 33.5 mm, and the fixed position of the micro-inverter 30 and the frame 401 does not increase the thickness of the photovoltaic module 40, and the front surface (the outer surface after installation) of the micro-inverter 30 does not exceed The back of the frame 401 can be flush with the back of the frame 401 without affecting the packaging of the photovoltaic module 40.

After the micro-inverter 30 is mounted on the photovoltaic module frame 401, the distance between the micro-inverter 30 and the back plate 403 of the photovoltaic module 40 can be controlled to be between 6-8 mm, so that sufficient ventilation space is reserved for the micro-inverter. The heat dissipation requirement of the inverter 30 prevents the heat dissipation of the micro-inverter 30 from affecting the performance of the photovoltaic module 40. In fact, a distance of 7 mm can be reserved to meet the ventilation requirements, and the outer surface of the micro-inverter 30 can be flush with the back surface of the frame 401 without reducing the thickness of the micro-inverter 30.

When the connection ear plate 311 is set, the specific connection manner of the connection ear plate 311 and the frame 401 can be as shown in Figs. The two sides of the corners of the connecting ear plate 311 and the frame 401 are provided with mounting holes corresponding to the positions. Generally, the frame 401 has a rectangular shape, and the upper and lower sides are called short borders, and the two sides are called long borders. At this time, the corresponding mounting holes can be set at the long and short borders at the corners. In the figure, the micro-inverter 30 has two connecting ears 311 connected to the short frame of the frame 401. The two connecting ear plates 311 are respectively provided with the ear plate mounting holes 311a, and the short frame of the frame 401 is provided with two ears respectively. Two frame mounting holes 401a corresponding to the board mounting holes 311a; one connecting ear plate 311 connected to the long frame of the frame 401 is also provided with an ear plate mounting hole 311a, and correspondingly, the long border of the frame 401 is also provided with a corresponding frame. The hole 401a is mounted. During installation, the micro-inverter 30 is placed at the corner of the frame 401, and the three sides 411 are mounted with holes 401a and three ear plate mounting holes 311a-correspondingly. At this time, the bolts can be inserted into the corresponding mounting holes, Rivets or pins are fixed. It can be understood that when the micro-inverter 30 is not disposed at the corners, it is not necessary to provide the connecting lug 311 corresponding to both sides of the frame 401, and it is sufficient to fix either side with the above-mentioned manner.

In this embodiment, there are three connection ear plates 311, two short side frames for connecting the bezel 401 (for connecting the lower side when the lower corner is attached), and the other for connecting the long bezel. In fact, the number of the attachment ear plates 311 is not limited by this.

As shown in Fig. 14, Fig. 14 is a front view of still another type of inverter.

The micro-inverter 30 is provided with two connecting ears 311 on both sides, and when fixed at the corners of the frame 401, the long frame and the short frame adjacent to the frame 401 are connected by two connecting ears 311. In fact, based on the actual fixed demand, it is possible to connect to either side of the bezel 401 through one or more of the connecting lugs 311. In addition, the connecting ear plates 311 need not be separately provided, and the area of the connecting ear plates 311 is increased, and one or more mounting holes may be provided thereon. It should be understood that when the micro-inverter 30 is disposed at the corner, the connecting ear plate 311 with the short frame of the frame 401 plays a main supporting role, and the side connecting ear plate 311 serves as an auxiliary supporting function, so the short frame is provided with the connecting ear plate. The number of 311 is extra long and long, which not only meets the fixed demand, but also simplifies the micro The structure of the inverter 30 reduces the processing difficulty and processing cost. In addition to the ear plate connection, those skilled in the art can fix the micro inverter 30 to the back side of the photovoltaic module 40 by other conventional connection methods, such as clamping, clamping, and the like.

The photovoltaic module system provided by the present invention comprises a photovoltaic module 40 and a mounting bracket 50 for assembling a plurality of the photovoltaic modules 40, and further includes a micro inverter 30 disposed on the back surface of the photovoltaic module 40 or disposed on the mounting bracket 50, The transformer 30 is the micro-inverter 30 described in any of the above embodiments. Since the micro-inverter 30 has the above technical effects, the photovoltaic module system has the same technical effect.

Further, the photovoltaic module system can be provided with a bus 60, and the bus 60 can be disposed along the mounting bracket 50, and the bus 60 can be fixed to the mounting bracket 50 by a tie or the like. Taking the micro-inverter 30 mounted on the frame 401 of the photovoltaic module 40 as an example, the AC output connectors 34 of the optical micro-inverters 30 can be connected to the bus 60, and the micro-inverters 30 of the bus 60 are connected in parallel. As shown in FIG. 3, three sets of photovoltaic modules 40 are arranged side by side, and are mounted on the bracket 50 by dedicated clamps, and the bus 60 fixed to the mounting bracket 50 can extend from the end of the photovoltaic module 40 to the tail photovoltaic module 40, each The micro-inverter 30 of the photovoltaic module 40 can be connected to its corresponding bus 60 portion. Three sets of photovoltaic modules 40 are shown in Figure 3, and the number of photovoltaic modules 40 is not limited, depending on actual usage requirements.

So designed, in the field installation, the AC output connectors 34 of each micro-inverter 30 are connected to the corresponding bus 60 portions, and the connectors of the AC output connectors 34 of the adjacent micro-inverters 30 need not be sequentially arranged. Plug-in, which further simplifies the installation steps and reduces installation costs.

In order to facilitate the connection of the micro-inverter 30 to the bus 60, a branch line 70 corresponding to each of the micro-inverters 30 may be further provided, which can be further understood with reference to Figs.

The bus 60 can be provided with a bus connector 601 corresponding to each micro-inverter 30; each branch line 70 is provided with a branch connector at each end thereof, as shown in FIG. 3, the first branch connector 701 and the second branch connector 702, the first branch line connector 701 is connected to the AC output connector 34 of the corresponding micro inverter 30, and the second branch line connector 702 is connected to the corresponding bus connector 601. In Fig. 4, in order to prevent the branch line 70 from shaking, the length of the branch line 70 may be slightly longer, and the branch line 70 may pass through the inside of the mounting bracket 50 from the top to the bottom and then be connected to the bus connector 601.

So designed, the branch line 70 can be installed on the bus 60 in advance, and the installer only needs to install it. The AC output connector 34 of the micro-inverter 30 is connected to the first branch connector 701 of the branch line 70. Or the branch line 70 is connected to the micro-inverter 30 before assembling the photovoltaic module 40 to the mounting bracket 50, for example, when assembling the micro-inverter 30 to the photovoltaic module 40, the branch line 70 is also connected at the same time, so that the factory-made photovoltaic module 40 is With a branch line 70, as shown in FIG. In the case of on-site installation, the second branch connector 702 of the branch line 70 can be directly connected to the bus connector 601, and the serial connection can be completed only once. Compared with the technical solutions in which the micro-inverters 30 of the prior art need to insert four connectors, it is obvious that the solution of the embodiment can make the installation process very simple.

Moreover, when the solution is installed, the distance between the junction box 402 and the micro-inverter 30 is constant, and the DC line 402a of the junction box 402 can be directly connected to the DC input connector 35 of the micro-inverter 30, and the length of the DC line 402a can be The control is more than half shorter than the standard DC wire, thereby saving cost; the first branch connector 701 of the branch line 70 is directly connected to the AC output connector 34, and the length of the bus 60 can be adjusted according to actual installation requirements.

The photovoltaic module 40 is typically implemented by two mounting brackets 50 when assembled. With FIG. 3 as the viewing angle, one mounting bracket 50 is located at the upper portion of the photovoltaic module 40, and another mounting bracket 50 is located at the lower portion of the photovoltaic module 40. The junction box 402 of the photovoltaic module 40 is generally located at the upper portion of the photovoltaic module 40. When the bus 60 is set, the bus 60 can be disposed on the mounting bracket 50 at the upper portion of the photovoltaic module 40, and the micro-inverter 30 is mounted on the upper side of the frame 401 of the photovoltaic module 40, such as the upper right corner shown in FIG. At this time, the connection distance between the micro-inverter 30 and the junction box 402 or the bus 60 is short, and the lengths of the DC wires 402a and the branch wires 70 of the junction box 402 are reduced to reduce the installation cost.

Referring to Figures 15-16, Figure 15 is a schematic structural view of a specific embodiment of a micro-inverter mounted on a mounting bracket; Figure 16 is a rear elevational view of Figure 15.

The photovoltaic module system provided by the present invention, in addition to being disposed on the back surface of the photovoltaic module 40, may be directly mounted on the mounting bracket 50. At this time, the mounting hole 312 can be provided on the micro-inverter 30, and can be fixed by a pin or a connecting member such as a bolt. Based on the structure of the mounting bracket 50, the mounting hole 312 can be provided only at one end of the micro-inverter 30. At this time, the line connection manner of the bus 60 and the branch line 70 described in the above embodiments can be applied to the mounting of the mounting bracket 50, and the same technical effects can be achieved, which will not be described herein.

A micro inverter and a photovoltaic module and a photovoltaic module system provided by the invention It is to be understood that the above description of the embodiments is merely to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

A micro-inverter having a housing (31), and an AC output connector (34) and a DC input connector (35), wherein the housing (31) is provided with a mounting hole, The AC output connector (34) and the DC input connector (35) are located at the corresponding mounting holes, the AC output connector (34) and the DC input connector (35) and the case The wiring of the internal printed circuit board (33) of the body (31) is located in the housing (31) of the micro-inverter (30).

2. The micro-inverter according to claim 1, wherein a side wall of the casing (31) is provided with an inner recess, and the DC input connector (35) and/or the alternating current output are mounted The mounting hole of the connector (34) is located in the inner recess;

One side of the casing (31) has an opening, and the micro-inverter (30) further includes a cover body (32) covering the open casing (31); the cover body (32) Covering the inner recess.

The micro-inverter according to claim 1, wherein the micro-inverter (30) further has a connection ear plate (311) through which the micro-inverter (30) passes The plate (311) is fixed to the bezel (401) of the photovoltaic module (40) or the mounting bracket (50) of the assembled photovoltaic component (40).

A photovoltaic module having a frame (401), characterized by further comprising the micro-inverter (30) according to claim 1 or 2, wherein the micro-inverter (30) is disposed on the photovoltaic module

The back side of (40) is fixed to the bezel (401) of the photovoltaic module (40).

5. A photovoltaic module according to claim 4, characterized in that the micro-inverter (30) is fixed at the corner of the bezel (401).

The photovoltaic module according to claim 5, wherein the micro-inverter (30) has a connecting lug (311) corresponding to two sides of a corner of the bezel (401), respectively. The micro inverter (30) is fixed to the frame (401) through the connecting lug plate (311).

The photovoltaic module according to any of claims 4-6, characterized in that the micro-inverter (30) has a predetermined gap with the backing plate (403) of the photovoltaic module.

8. A photovoltaic module system comprising a photovoltaic module (40) and a mounting bracket (50) for assembling a plurality of said photovoltaic modules (40), further comprising a rear surface or a setting disposed on said photovoltaic module (40) a micro inverter (30) on the mounting bracket (50), the micro inverter The device (30) is the micro-inverter (30) according to any one of claims 1-3.

9. The photovoltaic module system of claim 8, further comprising a bus (60) disposed along the mounting bracket (50), each of the micro-inverters (30) The AC output connectors (34) are both connected to the bus (60) to connect the micro-inverters (30) in parallel.

10. The photovoltaic module system according to claim 9, further comprising a branch line (70) corresponding to each of the micro inverters (30), wherein the bus line (60) is provided with each of the miniatures a bus connector (601) corresponding to the inverter (30);

Two ends of the branch line (70) are respectively provided with a first branch connector (701) and a second branch connector (702), and the first branch connector (701) is connected to the corresponding micro inverter ( The AC output connector (34) of the 30), the second branch connector (702) is connected to the bus connector (601).

The photovoltaic module system according to any one of claims 8 to 10, characterized in that it comprises two of the mounting brackets (50), wherein the mounting brackets (50) are located in the photovoltaic module (40) In the upper part, another mounting bracket (50) is located at a lower portion of the photovoltaic module (40), and the bus (60) is disposed on the mounting bracket (50) located at an upper portion of the photovoltaic module (40); A junction box (402) of the photovoltaic module (40) is located above the photovoltaic module (40), and the micro-inverter (30) is secured to the bezel (401) of the photovoltaic module (40).