CN108418544A - Solar Panel Junction Box and Solar Power System - Google Patents

Abstract

The invention discloses a kind of solar panel terminal box and solar power systems.Solar panel terminal box includes：Box body；It with bypass diode module, is contained in the box body, including at least one bypass diode.The positive terminal and negative pole end of each bypass diode are connected with the negative bus bar of a corresponding battery blade unit on solar panel and positive bus bar respectively.The solar panel terminal box further includes failure monitoring module, and the failure monitoring module is contained in the box body, for monitoring whether the solar panel breaks down.In the present invention, solar panel terminal box, which has, can monitor the failure monitoring module whether solar panel works normally in real time, repaired in time so as to the solar panel to failure, improve generating efficiency.

Description

Solar Panel Junction Box and Solar Power System

technical field

The invention relates to a solar panel junction box and a solar power generation system comprising the solar panel junction box.

Background technique

In the prior art, each solar panel generally includes a plurality of battery cells connected in series, and each battery cell unit includes a plurality of battery cells (for example, silicon cells or thin film cells) connected in series. A solar panel junction box generally includes a box body and a diode bypass module accommodated in the box body. The diode bypass module usually includes a plurality of bypass diodes connected in series. The positive terminal and the negative terminal of each bypass diode are respectively connected to the negative bus bar and the positive bus bar of a corresponding cell unit on the solar panel.

When each cell unit on the solar panel is working normally, the current generated by each cell unit directly flows into the electrical equipment or power supply network. When a cell unit on the solar panel fails and cannot work normally, for example, when a cell unit has a hot spot effect due to being blocked or stops working due to internal circuit breakage, other normally working cell units will The current will bypass the failed battery unit and flow through the bypass diode connected to the failed battery unit, thereby providing a bypass protection function for the solar panel to prevent the solar panel from being burned.

However, the existing solar panel junction box does not have a fault monitoring module for real-time monitoring of whether the solar panel is working normally, resulting in the inability to repair the failed solar panel in time and reducing the power generation efficiency.

Contents of the invention

The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and deficiencies in the prior art.

According to an object of the present invention, a junction box for a solar panel is provided, which has a fault monitoring module capable of real-time monitoring of whether the solar panel is working normally, so that the faulty solar panel can be repaired in time, and the power generation efficiency is improved.

According to one aspect of the present invention, there is provided a solar panel junction box, comprising: a box body; and a diode bypass module accommodated in the box body, including at least one bypass diode. The positive terminal and the negative terminal of each bypass diode are respectively connected to the negative bus bar and the positive bus bar of a corresponding cell unit on the solar panel. The solar panel junction box also includes a fault monitoring module, which is accommodated in the box body and used to monitor whether the solar panel is faulty.

According to an exemplary embodiment of the present invention, the fault monitoring module includes: at least one voltage acquisition circuit, each voltage acquisition circuit is connected in parallel with a corresponding bypass diode, and is used to acquire voltage at both ends of a corresponding battery slice unit. Voltage; and a wireless communication module, adapted to send the collected voltages of each battery slice unit to the power station control center, wherein the power station control center is adapted to collect the voltage of each battery slice unit according to each voltage acquisition circuit Determine if the solar panel is faulty.

According to another exemplary embodiment of the present invention, when the wireless communication module sends the collected voltage of each battery slice unit to the power station control center, it also sends the address information of each battery slice unit to the power station control center , so that the power station control center can quickly lock the location of the faulty battery slice unit.

According to another exemplary embodiment of the present invention, the fault monitoring module further includes a micro control unit, and the micro control unit is electrically connected with the wireless communication module and each voltage acquisition circuit; each voltage acquisition circuit will collect The received voltage of each battery slice unit is transmitted to the micro-control unit, and the address information of each battery slice unit is pre-stored in the micro-control unit; the micro-control unit will receive the voltage of each battery slice unit and the The stored address information of each battery slice unit is transmitted to the wireless communication module together.

According to another exemplary embodiment of the present invention, the fault monitoring module further includes a DC/DC power supply module, and the DC/DC power supply module communicates with the wireless communication module, the micro control unit and each voltage acquisition circuit Electrical connection for supplying power to the wireless communication module, the micro control unit and each voltage acquisition circuit.

According to another exemplary embodiment of the present invention, the DC/DC power supply module is connected in parallel with the entire diode bypass module.

According to another exemplary embodiment of the present invention, the wireless communication module is a wireless communication module using the GPRS communication protocol.

According to another exemplary embodiment of the present invention, the solar panel has a plurality of cell units, and the plurality of cell units are connected in series; the diode bypass module includes a plurality of bypass diodes, each The positive terminal and the negative terminal of the bypass diode are respectively connected to the negative bus bar and the positive bus bar of a corresponding cell unit; and the fault monitoring module includes a plurality of voltage acquisition circuits, and each voltage acquisition circuit is connected to a corresponding bypass The diodes are connected in parallel.

According to another exemplary embodiment of the present invention, the diode bypass module further includes a plurality of conductive terminals, and each bypass diode is connected in series between two adjacent conductive terminals; the positive terminal of each bypass diode One of the two adjacent conductive terminals is electrically connected to the negative bus bar of a corresponding cell unit; the negative terminal of each bypass diode is connected to the other conductive terminal of the adjacent two conductive terminals. The positive bus bar of a corresponding cell unit is electrically connected.

According to another exemplary embodiment of the present invention, the fault monitoring module further includes a circuit board, and the DC/DC power supply module, the micro control unit, the wireless communication module and each voltage acquisition circuit are integrated on on the circuit board.

According to another exemplary embodiment of the present invention, the box body includes a first accommodation chamber and a second accommodation chamber, and the diode bypass module and the fault monitoring module are respectively accommodated in the first accommodation chamber and the second accommodation chamber. in the second storage chamber.

According to another exemplary embodiment of the present invention, the solar panel junction box further includes a first box cover and a second box cover adapted to respectively cover the openings of the first accommodation chamber and the second accommodation chamber.

According to another exemplary embodiment of the present invention, at least one of the first box cover and the second box cover is detachably locked on the box body.

According to another exemplary embodiment of the present invention, the solar panel junction box further includes a first connector and a second connector located outside the box, the first connector is connected to the one end of the diode bypass module, and the second connector is connected to the other end of the diode bypass module via a second cable.

According to another exemplary embodiment of the present invention, one of the first connector and the second connector is a male connector, and the other is a female connector suitable for mating with the male connector device.

According to another aspect of the present invention, a solar power generation system is provided, comprising: a solar panel having at least one cell unit; the aforementioned solar panel junction box, the solar panel junction box being installed on the solar panel; and a power station control center, communicating wirelessly with the solar panel junction box. The power station control center judges whether the solar panel fails according to the voltage of each cell unit collected by each voltage collection circuit.

According to an exemplary embodiment of the present invention, when the collected voltage of any battery slice unit is lower than a predetermined value, the power station control center determines that the solar panel is faulty.

According to another exemplary embodiment of the present invention, the solar power generation system further includes an alarm device for sending out an alarm when the solar panel fails.

In each of the foregoing exemplary embodiments according to the present invention, the solar panel junction box has a fault monitoring module capable of real-time monitoring of whether the solar panel is working normally, so that faulty solar panels can be repaired in time, and power generation efficiency is improved.

Other objects and advantages of the present invention will be apparent from the following description of the present invention with reference to the accompanying drawings, and may help to provide a comprehensive understanding of the present invention.

Description of drawings

Fig. 1 shows the three-dimensional schematic view of the solar panel junction box according to an exemplary embodiment of the present invention;

Fig. 2 shows the three-dimensional schematic view of the fault monitoring module of the solar panel junction box shown in Fig. 1;

Fig. 3 shows the circuit block diagram of the solar panel junction box according to an exemplary embodiment of the present invention; With

FIG. 4 shows a schematic diagram of a diode bypass module of a solar panel junction box according to an exemplary embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as a limitation of the present invention.

In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.

According to a general technical idea of the present invention, a solar panel junction box is provided, comprising: a box body; and a diode bypass module accommodated in the box body, including at least one bypass diode. The positive terminal and the negative terminal of each bypass diode are respectively connected to the negative bus bar and the positive bus bar of a corresponding cell unit on the solar panel. The solar panel junction box also includes a fault monitoring module, which is accommodated in the box body and used to monitor whether the solar panel is faulty.

Fig. 1 shows the three-dimensional schematic diagram of the solar panel junction box according to an exemplary embodiment of the present invention; Fig. 2 shows the three-dimensional schematic diagram of the failure monitoring module 120 of the solar panel junction box shown in Fig. 1; Fig. 3 shows the three-dimensional schematic diagram according to the present invention A circuit block diagram of a solar panel junction box according to an exemplary embodiment; FIG. 4 shows a schematic diagram of a diode bypass module 110 of a solar panel junction box according to an exemplary embodiment of the present invention.

As shown in FIGS. 1 to 4 , in the illustrated embodiment, the solar panel junction box mainly includes: a box body 100 , a diode bypass module 110 and a fault monitoring module 120 . The diode bypass module 110 and the fault monitoring module 120 are accommodated in the box body 100 .

As shown in FIG. 3 , in the illustrated embodiment, the diode bypass module 110 includes at least one bypass diode D1 , D2 , D3 . The positive terminal and the negative terminal of each bypass diode D1 , D2 , D3 are respectively connected to the negative bus bar C− and the positive bus bar C+ of a corresponding battery cell C1 , C2 , C3 on the solar panel 200 .

In an exemplary embodiment of the present invention, the aforementioned fault monitoring module 120 is used to monitor whether the solar panel 200 is faulty in real time.

As shown in FIG. 3 , in the illustrated embodiment, the aforementioned fault monitoring module 120 mainly includes: a wireless communication module 123 and at least one voltage acquisition circuit V1 , V2 , V3 . As shown in FIG. 3 , each voltage acquisition circuit V1 , V2 , V3 is connected in parallel with a corresponding bypass diode D1 , D2 , D3 for acquiring the voltage across a corresponding cell C1 , C2 , C3 . The wireless communication module 123 is adapted to send the collected voltages of each battery slice unit C1, C2, C3 to a remote power station control center (not shown). In this way, the power station control center can judge whether the solar panel 200 is faulty according to the voltages of the battery cells C1 , C2 , C3 collected by each voltage collection circuit V1 , V2 , V3 .

In an exemplary embodiment of the present invention, when the collected voltage of any battery slice unit C1 , C2 , C3 is lower than a predetermined value, the power station control center determines that the solar panel 200 is faulty.

In another exemplary embodiment of the present invention, the aforementioned wireless communication module 123 sends the collected voltages of each battery slice unit C1, C2, and C3 to the power station control center, and also sends the collected voltages of each battery slice unit C1, C2, and C3 to the power station control center. The address information of C2 and C3 is sent to the power station control center, so that the power station control center can quickly lock the location of the faulty battery unit.

As shown in FIG. 3 , in the illustrated embodiment, the fault monitoring module 120 further includes a microcontroller unit 122 . The micro control unit 122 is electrically connected with the wireless communication module 123 and each voltage acquisition circuit V1, V2, V3. Each voltage collection circuit V1 , V2 , V3 transmits the collected voltage of each cell C1 , C2 , C3 to the micro control unit 122 . The address information of each battery slice unit C1 , C2 , C3 may be pre-stored in the micro control unit 122 . The micro control unit 122 transmits the received voltage of each battery slice unit C1 , C2 , C3 and the pre-stored address information of each battery slice unit C1 , C2 , C3 to the wireless communication module 123 .

As shown in FIG. 3 , in the illustrated embodiment, the fault monitoring module 120 further includes a DC/DC power supply module 121 . The DC/DC power supply module 121 is electrically connected with the wireless communication module 123, the micro control unit 122 and each voltage acquisition circuit V1, V2, V3, and is used to supply the wireless communication module 123, the micro control unit 122 and each voltage acquisition circuit V1 , V2, V3 power supply.

As shown in FIG. 3 , in the illustrated embodiment, the DC/DC power module 121 is connected in parallel with the entire diode bypass module 110 . At this time, when a part of the bypass diodes in the entire diode bypass module 110 is broken down, the DC/DC power supply module 121 can still provide power for the wireless communication module 123, the micro control unit 122 and each voltage acquisition circuit V1, V2, V3 powered by. When all the bypass diodes in the entire diode bypass module 110 are broken down, the DC/DC power supply module 121 will not be able to supply power to the wireless communication module 123, the micro control unit 122 and each voltage acquisition circuit V1, V2, V3 , at this time, the wireless communication module 123 cannot send any information to the power station control center, and the power station control center will not receive the information sent by the solar panel junction box. At this time, the power station control center can judge the fault in the solar panel junction box The monitoring module 120 fails.

In another exemplary embodiment of the present invention, the aforementioned wireless communication module 123 is a wireless communication module using the GPRS communication protocol.

As shown in FIG. 3 and FIG. 4 , in the illustrated embodiment, the solar panel has a plurality of cell units C1 , C2 , and C3 , and the plurality of cell units C1 , C2 , and C3 are connected in series. The diode bypass module 110 includes a plurality of bypass diodes D1, D2, D3, and the positive and negative terminals of each bypass diode D1, D2, D3 are respectively connected to the negative bus bar of a corresponding cell C1, C2, C3. C- is connected to the positive bus bar C+. The fault monitoring module 120 includes a plurality of voltage acquisition circuits V1, V2, V3, and each voltage acquisition circuit V1, V2, V3 is connected in parallel with a corresponding bypass diode D1, D2, D3.

As shown in Figure 3 and Figure 4, in the illustrated embodiment, the diode bypass module 110 also includes a plurality of conductive terminals B1, B2, B3, B4, each bypass diode D1, D2, D3 is connected in series to adjacent Between the two conductive terminals B1, B2, B3, B4 of the The positive end of each bypass diode D1, D2, D3 is connected to a corresponding battery cell C1, C2 through one of the two adjacent conductive terminals B1, B2, B3, B4. , The negative bus bar C- of C3 is electrically connected. The negative end of each bypass diode D1, D2, D3 is connected to a corresponding battery cell C1, The positive bus bar C+ of C2 and C3 is electrically connected.

As shown in FIGS. 1 and 2 , in the illustrated embodiment, the fault monitoring module 120 further includes a circuit board 120a. The aforementioned DC/DC power supply module 121, micro control unit 122, wireless communication module 123 and each voltage acquisition circuit V1, V2, V3 are integrated on the circuit board 120a.

As shown in FIG. 1 and FIG. 2, in the illustrated embodiment, the box body 100 includes a first accommodating chamber 101 and a second accommodating chamber 102, and a diode bypass module 110 and a fault monitoring module 120 are respectively accommodated in the first accommodating chamber 101 and the second accommodating chamber 102.

As shown in Figures 1 and 2, in the illustrated embodiment, the solar panel junction box further includes a first cover 103 and a second cover 103 adapted to cover the openings of the first receiving chamber 101 and the second receiving chamber 102 respectively. Two lids 104.

As shown in FIGS. 1 and 2 , in the illustrated embodiment, at least one of the first cover 103 and the second cover 104 is detachably locked on the box body 100 .

As shown in Figures 1 and 2, in the illustrated embodiment, the solar panel junction box further includes a first connector 131 and a second connector 132 located outside the box body 100, the first connector 131 is connected via a first cable 141 is connected to one end of the diode bypass module 110 , and the second connector 132 is connected to the other end of the diode bypass module 110 via a second cable 142 .

As shown in Figures 1 and 2, in the illustrated embodiment, one of the first connector 131 and the second connector 132 is a male connector, and the other is a male connector suitable for docking with the male connector. Female connector.

Although not shown, in another exemplary embodiment of the present invention, a solar power generation system is also disclosed. The solar power generation system mainly includes: a solar panel 200, which has at least one cell unit C1, C2, and C3; the aforementioned solar panel junction box, which is installed on the solar panel 200; and a power station control center, which is connected to the solar panel box for wireless communication. The power station control center judges whether the solar panel 200 is faulty or not according to the voltage of each battery cell C1 , C2 , C3 collected by each voltage collection circuit V1 , V2 , V3 .

In one embodiment of the present invention, when the collected voltage of any one of the battery slice units C1 , C2 , C3 is lower than a predetermined value, the power station control center determines that the solar panel 200 is faulty.

Although not shown in the figure, in another exemplary embodiment of the present invention, the aforementioned solar power generation system may further include an alarm device for sending out an alarm when the solar panel 200 fails. In this way, maintenance personnel can be notified in time to repair the failed solar panel 200 in time.

Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can improve them, and the structures described in various embodiments do not conflict with each other in terms of structure or principle Can be combined freely.

Although the present invention has been described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation of the present invention.

While certain embodiments of the present general inventive concept have been shown and described, it will be understood by those of ordinary skill in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept. The scope is defined by the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Furthermore, any element references in the claims should not be construed as limiting the scope of the invention.

Claims (18)

1. A solar panel junction box, comprising: box body (100); and a diode bypass module (110), housed in said box (100), comprising at least one bypass diode (D1, D2, D3), Wherein, the positive end and the negative end of each bypass diode (D1, D2, D3) are respectively connected to the negative electrode bus bar (C-) of a corresponding cell unit (C1, C2, C3) on the solar panel (200). Connect to the positive bus bar (C+), It is characterized by: The solar panel junction box also includes a fault monitoring module (120), which is accommodated in the box body (100) and used to monitor whether the solar panel (200) is faulty. 2. The solar panel junction box according to claim 1, characterized in that, the fault monitoring module (120) comprises: At least one voltage acquisition circuit (V1, V2, V3), each voltage acquisition circuit (V1, V2, V3) is connected in parallel with a corresponding bypass diode (D1, D2, D3), used to acquire a corresponding cell the voltage across the cells (C1, C2, C3); and The wireless communication module (123) is suitable for sending the collected voltages of each battery slice unit (C1, C2, C3) to the power station control center, Wherein, the power station control center is suitable for judging whether the solar panel (200) fails according to the voltage of each battery unit (C1, C2, C3) collected by each voltage collection circuit (V1, V2, V3). 3. The solar panel junction box according to claim 2, characterized in that: The wireless communication module (123) sends the collected voltage of each battery slice unit (C1, C2, C3) to the power station control center, and also sends the address information of each battery slice unit (C1, C2, C3) The information is sent to the power station control center, so that the power station control center can quickly lock the location of the faulty battery slice unit. 4. The solar panel junction box according to claim 3, characterized in that: The fault monitoring module (120) also includes a micro control unit (122), and the micro control unit (122) is electrically connected to the wireless communication module (123) and each voltage acquisition circuit (V1, V2, V3); Each voltage acquisition circuit (V1, V2, V3) transmits the collected voltage of each battery slice unit (C1, C2, C3) to the micro control unit (122), and each battery slice unit (C1, C2, C3 ) address information is pre-stored in the micro control unit (122); The micro control unit (122) transmits the received voltage of each battery slice unit (C1, C2, C3) and the pre-stored address information of each battery slice unit (C1, C2, C3) together to the wireless communication modules (123). 5. The solar panel junction box according to claim 4, characterized in that: The fault monitoring module (120) also includes a DC/DC power supply module (121), and the DC/DC power supply module (121) communicates with the wireless communication module (123), the micro control unit (122) and each The voltage acquisition circuits (V1, V2, V3) are electrically connected to supply power to the wireless communication module (123), the micro control unit (122) and each voltage acquisition circuit (V1, V2, V3). 6. The solar panel junction box according to claim 5, characterized in that: The DC/DC power supply module (121) is connected in parallel with the entire diode bypass module (110). 7. The solar panel junction box according to claim 2, characterized in that: The wireless communication module (123) is a wireless communication module adopting GPRS communication protocol. 8. The solar panel junction box according to claim 2, characterized in that: The solar panel has a plurality of cell units (C1, C2, C3), and the plurality of cell units (C1, C2, C3) are connected in series; The diode bypass module (110) includes a plurality of bypass diodes (D1, D2, D3), and the positive terminal and negative terminal of each bypass diode (D1, D2, D3) are respectively connected to a corresponding cell unit ( The negative bus bar (C-) of C1, C2, C3) is connected to the positive bus bar (C+); and The fault monitoring module (120) includes a plurality of voltage acquisition circuits (V1, V2, V3), each voltage acquisition circuit (V1, V2, V3) is connected in parallel with a corresponding bypass diode (D1, D2, D3) . 9. The solar panel junction box according to claim 7, characterized in that: The diode bypass module (110) also includes a plurality of conductive terminals (B1, B2, B3, B4), and each bypass diode (D1, D2, D3) is connected in series to two adjacent conductive terminals (B1, B2 , B3, B4); The positive end of each bypass diode (D1, D2, D3) is connected to a corresponding one of the two adjacent conductive terminals (B1, B2, B3, B4) The negative bus bar (C-) of the cell unit (C1, C2, C3) is electrically connected; The negative terminal of each bypass diode (D1, D2, D3) is connected to a corresponding The positive bus bar (C+) of the battery slice units (C1, C2, C3) is electrically connected. 10. The solar panel junction box according to claim 5, characterized in that: The fault monitoring module (120) also includes a circuit board (120a), the DC/DC power supply module (121), the micro control unit (122), the wireless communication module (123) and each voltage acquisition Circuits (V1, V2, V3) are integrated on said circuit board (120a). 11. The solar panel junction box according to claim 1, characterized in that: The box body (100) includes a first accommodating chamber (101) and a second accommodating chamber (102), the diode bypass module (110) and the fault monitoring module (120) are respectively accommodated in the first accommodating chamber cavity (101) and the second accommodating cavity (102). 12. The solar panel junction box according to claim 11, characterized in that: The solar panel junction box further includes a first box cover (103) and a second box cover (104) adapted to cover openings of the first accommodation chamber (101) and the second accommodation chamber (102) respectively. 13. The solar panel junction box according to claim 12, characterized in that: At least one of the first box cover (103) and the second box cover (104) is detachably locked on the box body (100). 14. The solar panel junction box according to claim 1, characterized in that: The solar panel junction box also includes a first connector (131) and a second connector (132) located outside the box body (100), and the first connector (131) is connected via a first cable (141) Connected to one end of the diode bypass module (110), the second connector (132) is connected to the other end of the diode bypass module (110) via a second cable (142). 15. The solar panel junction box according to claim 14, characterized in that: One of the first connector (131) and the second connector (132) is a male connector, and the other is a female connector suitable for mating with the male connector. 16. A solar power generation system comprising: A solar panel (200) having at least one cell unit (C1, C2, C3); The solar panel junction box according to any one of the preceding claims 2-15, the solar panel junction box being mounted on the solar panel (200); and a plant control center, in wireless communication with said solar panel junction box, The power station control center judges whether the solar panel (200) is faulty according to the voltage of each battery slice unit (C1, C2, C3) collected by each voltage collection circuit (V1, V2, V3). 17. The solar power generation system according to claim 16, characterized in that: When the collected voltage of any battery slice unit (C1, C2, C3) is lower than a predetermined value, the power station control center determines that the solar panel (200) is faulty. 18. The solar power generation system according to claim 16, characterized in that: The solar power generation system also includes an alarm device for sending out an alarm when the solar panel (200) fails.