Portable photovoltaic power generation apparatus

Abstract

Provided in the present application is a portable photovoltaic power generation apparatus. The portable photovoltaic power generation apparatus comprises: a transmission line; a photovoltaic module, which is electrically connected to the transmission line; a changeover switch, which is arranged on the transmission line, and is used for switching the connection mode between the photovoltaic module and the transmission line, wherein the connection mode comprises series connection and / or parallel connection; and a protective member, which is arranged on the changeover switch, and is used for protecting the photovoltaic module from damage when the photovoltaic module is shaded or malfunctions. In the portable photovoltaic power generation apparatus provided by the present application, the changeover switch is provided to perform switching between series connection and parallel connection, such that rapid switching can be realized, thereby improving the switching efficiency. The photovoltaic module can be protected from damage when the photovoltaic module is shaded or malfunctions, and there is no need to provide a bypass diode on each single panel of the photovoltaic module, such that the number of bypass diodes provided is reduced, thereby lowering the costs.

Description

Portable photovoltaic power generation device

[0001] The present application claims priority from the Chinese patent application No. 202422287860.X filed on September 19, 2024, and entitled "Portable photovoltaic power generation device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of photovoltaic power generation, in particular to a portable photovoltaic power generation device. BACKGROUND

[0003] At present, the series-parallel switching mode of photovoltaic solar panels is realized by additionally setting parallel bus and series bus to switch series-parallel connection, and this switching mode is low in efficiency. In addition, in the related art, in order to improve the power of photovoltaic modules, it is usually to increase the size of a single photovoltaic panel or increase the number of folds to improve the overall module power, but this way needs to set bypass diodes on the junction box of each photovoltaic panel to prevent photovoltaic panel damage. Since bypass diodes need to be set on each photovoltaic panel, the cost is increased.

[0004] Therefore, the inventor realizes that it is urgent to design a portable photovoltaic power generation device which is convenient to switch between series and parallel connection and low in cost. SUMMARY

[0005] The present application aims to at least solve the problems of low switching efficiency and high cost of photovoltaic power generation device series-parallel connection.

[0006] To this end, the first aspect of the present application provides a portable photovoltaic power generation device.

[0007] Therefore, the first aspect of the present application provides a portable photovoltaic power generation device.

[0008] The portable photovoltaic power generation device provided in the application comprises a transmission line, a photovoltaic assembly, a switching switch and a protection piece. The photovoltaic assembly is electrically connected with the transmission line, and the switching switch is arranged on the transmission line and can switch the connection mode of the photovoltaic assembly and the transmission line. For example, the series connection mode of the transmission line and the photovoltaic assembly can be switched to the parallel connection mode, or the parallel connection mode between the transmission line and the photovoltaic assembly can be switched to the series connection mode. It can be understood that, in actual application, the photovoltaic assembly and the transmission line are often switched between series connection and parallel connection to meet actual requirements due to the requirement of voltage. Therefore, compared with the mode of switching by additionally arranging series busbars and parallel busbars in the related art, the switching switch is arranged to switch between series connection and parallel connection in the application, so that the switching efficiency is improved. At the same time, since the protection piece is arranged on the switching switch in the application, the photovoltaic assembly can be protected from being damaged when the photovoltaic assembly is blocked or fails. Therefore, it is not necessary to arrange a bypass diode on each single panel of the photovoltaic assembly, thereby reducing the number of bypass diodes and reducing the cost. Since the photovoltaic assembly is connected with the transmission line through the switching switch, the protection piece arranged on the switching switch can protect the photovoltaic assembly. Therefore, the protection piece can protect the whole photovoltaic assembly, so that it is not necessary to arrange a bypass diode on each single panel, thereby saving cost.

[0009] The portable photovoltaic power generation device provided in the application can further have the following additional technical features.

[0010] In some embodiments, optionally, the protection piece comprises at least one of a bypass diode, an intelligent diode, a micro-inverter and an optimizer.

[0011] In some embodiments, optionally, the protection piece is arranged in parallel with the switching switch.

[0012] In some embodiments, optionally, the switching switch comprises a first connection end and a second connection end, the first connection end is connected with the transmission line, the second connection end is connected with the photovoltaic assembly, and the protection piece is arranged at the second connection end.

[0013] In some embodiments, optionally, the transmission line comprises a first busbar and a second busbar, the first connection end comprises a first connecting head and a second connecting head, the first connecting head is electrically connected with one of the first busbar and the second busbar, the second connecting head can be switched between a first position and a second position, the second connecting head is electrically connected with the first busbar when the second connecting head is at the first position, and the second connecting head is electrically connected with the second busbar when the second connecting head is at the second position.

[0014] In some embodiments, the portable photovoltaic power generation device further comprises an energy storage device electrically connected to the transmission line, configured to store the electric energy transmitted by the transmission line.

[0015] In some embodiments, the portable photovoltaic power generation device further comprises an output terminal arranged on the transmission line, and the transmission line and the energy storage device are electrically connected through the output terminal.

[0016] In some embodiments, the portable photovoltaic power generation device further comprises a voltage detection module arranged on the transmission line, configured to detect the voltage on the transmission line; and a control module connected to the voltage detection module, configured to control the switching switch to switch according to the voltage detected by the voltage detection module.

[0017] In some embodiments, the number of photovoltaic assemblies is multiple, and any photovoltaic assembly comprises a plurality of photovoltaic panels, and the plurality of photovoltaic panels are connected to each other to form a foldable structure.

[0018] In some embodiments, the number of switching switches is multiple, and the switching switches correspond to the photovoltaic assemblies one by one.

[0019] Additional aspects and advantages of the present application will become apparent from the following description with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0021] FIG. 1 shows a structural schematic diagram of a portable photovoltaic power generation device according to an embodiment of the present application;

[0022] FIG. 2 shows a partial structural schematic diagram of a portable photovoltaic power generation device according to an embodiment of the present application;

[0023] FIG. 3 shows a structural schematic diagram of a portable photovoltaic power generation device according to an embodiment of the present application.

[0024] In FIGS. 1-3, the correspondence between the reference signs and the component names is as follows: 1 transmission line, 12 first bus, 14 second bus, 2 photovoltaic assembly, 22 photovoltaic panel, 24 positive electrode of photovoltaic assembly, 26 negative electrode of photovoltaic assembly, 3 switching switch, 32 first connection end, 322 first connecting head, 324 second connecting head, 34 second connection end, 342 third connecting head, 344 fourth connecting head, 4 protection member, 42 bypass diode, 5 energy storage device, 6 output terminal, 7 voltage detection module, 8 control module. DETAILED DESCRIPTION

[0025] In order to enable a clearer understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other manners different from those described herein, and therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0027] The portable photovoltaic power generation device according to some embodiments of the present application is described below with reference to FIGS. 1 to 3.

[0028] According to one embodiment of the first aspect of the present application, as shown in FIGS. 1, 2 and 3, a portable photovoltaic power generation device is provided, comprising a transmission line 1, a photovoltaic assembly 2, a switching switch 3 and a protection 4. The photovoltaic assembly 2 is electrically connected to the transmission line 1. The switching switch 3 is arranged on the transmission line 1, and is used to switch the connection mode of the photovoltaic assembly 2 and the transmission line 1, wherein the connection mode includes series connection and / or parallel connection. The protection 4 is arranged on the switching switch 3, and is used to protect the photovoltaic assembly 2 from being damaged when the photovoltaic assembly 2 is blocked or fails.

[0029] The portable photovoltaic power generation device provided in the application comprises a transmission line 1, a photovoltaic assembly 2, a switching switch 3 and a protection piece 4. The photovoltaic assembly 2 is electrically connected with the transmission line 1, and the switching switch 3 is arranged on the transmission line 1 and can switch the connection mode of the photovoltaic assembly 2 and the transmission line 1, for example, the series connection mode of the transmission line 1 and the photovoltaic assembly 2 can be switched to the parallel connection mode, or the parallel connection mode between the transmission line 1 and the photovoltaic assembly 2 can be switched to the series connection mode. It can be understood that, in actual application, the photovoltaic assembly 2 and the transmission line 1 are often switched between series connection and parallel connection to meet actual requirements due to voltage requirements, and therefore, compared with the mode of switching by additionally arranging series bus lines and parallel bus lines in the related art, the switching switch 3 is arranged to switch between series connection and parallel connection, so that quick switching is realized and the switching efficiency is improved. Meanwhile, the protection piece 4 is arranged on the switching switch 3, so that the photovoltaic assembly 2 can be protected from being damaged when the photovoltaic assembly 2 is shaded or fails, and therefore, it is not necessary to arrange bypass diodes on each single panel of the photovoltaic assembly 2, so that the number of bypass diodes arranged is reduced and the cost is reduced. The reason why the protection piece 4 arranged on the switching switch 3 can protect the photovoltaic assembly 2 is that the photovoltaic assembly 2 is connected with the transmission line 1 through the switching switch 3 as a whole, and therefore, the protection piece 4 can protect the photovoltaic assembly 2 as a whole, so that bypass diodes do not need to be arranged on each single panel, thereby saving cost.

[0030] In some embodiments, optionally, the protection piece 4 comprises at least one of a bypass diode 42, an intelligent diode, a micro inverter and an optimizer.

[0031] In the embodiments, the protection piece 4 comprises at least one of a bypass diode 42, an intelligent diode, a micro inverter and an optimizer. Preferably, the protection piece 4 can be a bypass diode, when a part of the photovoltaic assembly 2 is shaded or fails to generate electricity, the bypass diode is turned on to make the current bypass the failed part and continue to flow, so that the electricity generation of other normal assemblies is not affected.

[0032] In some embodiments, optionally, the protection piece 4 is arranged in parallel with the switching switch 3.

[0033] In the embodiments, the protection piece 4 can be arranged in parallel with the switching switch 3, so that the current can bypass the failed assembly to protect the electricity generation efficiency of other normal assemblies, and also protect the bypassed assembly (the bypassed assembly refers to an assembly that cannot work normally due to shading, damage or performance degradation) from being damaged.

[0034] In some embodiments, the switching switch 3 comprises a first connecting end 32 and a second connecting end 34, the first connecting end 32 is connected with the transmission line 1, the second connecting end 34 is connected with the photovoltaic module 2, and the protection member 4 is arranged at the second connecting end 34.

[0035] In some embodiments, the switching switch 3 comprises a first connecting end 32 and a second connecting end 34, the first connecting end 32 is connected with the transmission line 1, the second connecting end 34 is connected with the photovoltaic module 2, and the protection member 4 is arranged at the second connecting end 34, i.e. the protection member 4 is arranged at one end close to the photovoltaic module 2, which is conducive to the arrangement of the protection member 4.

[0036] In some embodiments, the protection member 4 is arranged on the photovoltaic module 2 and located at the connection between the photovoltaic module 2 and the transmission line 1.

[0037] In some embodiments, the transmission line 1 comprises a first busbar 12 and a second busbar 14, the first connecting end 32 comprises a first connecting head 322 and a second connecting head 324, the first connecting head 322 is electrically connected with one of the first busbar 12 and the second busbar 14, and the second connecting head 324 is switchable between a first position and a second position, the second connecting head 324 is electrically connected with the first busbar 12 when the second connecting head 324 is in the first position, and the second connecting head 324 is electrically connected with the second busbar 14 when the second connecting head 324 is in the second position.

[0038] In some embodiments, the transmission line 1 comprises a first busbar 12 and a second busbar 14, the first connecting end 32 comprises a first connecting head 322 and a second connecting head 324, the first connecting head 322 is electrically connected with one of the first busbar 12 and the second busbar 14, and the second connecting head 324 is switchable between a first position and a second position, the second connecting head 324 is electrically connected with the first busbar 12 when the second connecting head 324 is in the first position, and the second connecting head 324 is electrically connected with the second busbar 14 when the second connecting head 324 is in the second position. With this arrangement, the switching between series connection and parallel connection can be realized by switching the second connecting head 324 between the first position and the second position, for example, the photovoltaic module 2 and the transmission line 1 are in parallel connection when the second connecting head 324 is in the first position, and the photovoltaic module 2 and the transmission line 1 are in series connection when the second connecting head 324 is in the second position.

[0039] In some embodiments, the first busbar 12 is a positive busbar, and the second busbar 14 is a negative busbar.

[0040] In some embodiments, optionally, the second connecting end 34 comprises a third connecting head 342 and a fourth connecting head 344, the third connecting head 342 is in conduction with the first connecting head 322, and the fourth connecting head 344 is in conduction with the second connecting head 324; the positive pole 24 of the photovoltaic module is connected with the fourth connecting head 344, and the negative pole 26 of the photovoltaic module is connected with the third connecting head 342.

[0041] In some embodiments, optionally, the positive pole of the bypass diode is electrically connected with the fourth connecting head 344, and the negative pole of the bypass diode is electrically connected with the third connecting head 342.

[0042] In some embodiments, optionally, the portable photovoltaic power generation device further comprises an energy storage device 5, which is electrically connected with the transmission line 1 and used for storing the electric energy transmitted by the transmission line 1.

[0043] In some embodiments, the portable photovoltaic power generation device further comprises an energy storage device 5. The energy storage device 5 is electrically connected with the transmission line 1 and can store the electric energy transmitted by the transmission line 1, thereby providing power for the user.

[0044] In some embodiments, optionally, the portable photovoltaic power generation device further comprises an output end head 6, which is arranged on the transmission line 1, and the transmission line 1 and the energy storage device 5 are electrically connected through the output end head 6.

[0045] In some embodiments, the portable photovoltaic power generation device further comprises an output end head 6. The output end head 6 is arranged on the transmission line 1, and the transmission line 1 and the energy storage device 5 are electrically connected through the output end head 6. The arrangement of the output end head 6 can facilitate the connection between the transmission line 1 and the energy storage device 5 and improve the stability of the connection.

[0046] In some embodiments, optionally, the output end head 6 comprises an MC4 connector and a DC8020 connector.

[0047] In some embodiments, optionally, the portable photovoltaic power generation device further comprises a voltage detection module 7 arranged on the transmission line 1 and used for detecting the voltage on the transmission line 1, and a control module 8 connected with the voltage detection module 7 and used for controlling the switching of the switch 3 according to the voltage detected by the voltage detection module 7.

[0048] In some embodiments, the portable photovoltaic power generation device further comprises a voltage detection module 7 and a control module 8. The voltage detection module 7 is arranged on the transmission line 1 and can detect the voltage on the transmission line 1. The control module 8 is connected with the voltage detection module 7 and can control the switching of the switch 3 according to the voltage detected by the voltage detection module 7. The arrangement of the voltage detection module 7 and the control module 8 can realize automatic switching circuit, reduce the operation of the user, and improve the experience of the user.

[0049] Wherein, when the voltage reaches the preset value, the control module 8 controls the switching switch 3 to switch, and the preset value can be set by the user.

[0050] In some embodiments, optionally, the number of photovoltaic assemblies 2 is multiple, any photovoltaic assembly 2 includes multiple photovoltaic panels 22, and the multiple photovoltaic panels 22 are connected to each other to form a foldable structure.

[0051] In these embodiments, the number of photovoltaic assemblies 2 is multiple, and the multiple photovoltaic assemblies 2 are connected to the transmission line 1. Any photovoltaic assembly 2 includes multiple photovoltaic panels 22, and the multiple photovoltaic panels 22 are connected to each other to form a foldable structure, so as to increase the power of the photovoltaic assembly 2, improve the power generation efficiency, and facilitate the storage of the photovoltaic assembly 2 due to the foldable structure.

[0052] In some embodiments, optionally, the number of switching switches 3 is multiple, and the switching switches 3 correspond to the photovoltaic assemblies 2 one by one.

[0053] In these embodiments, the number of switching switches 3 is multiple, and the switching switches 3 correspond to the photovoltaic assemblies 2 one by one, so as to switch the series and parallel connection according to the actual situation of each photovoltaic assembly 2 to ensure the normal power generation of other photovoltaic assemblies 2.

[0054] In some embodiments, optionally, the power of a single panel (single photovoltaic panel) assembly is within 100W, multiple single panels are connected through a full parallel structure to meet a 400W-600W high-power portable assembly, and the overall size and the area of the single panel are the same through the folding storage function of the structure.

[0055] In some embodiments, optionally, the switching switch includes a bus with switch control series and parallel connection, and multiple assemblies (photovoltaic assemblies) can be connected in series or in parallel on the bus.

[0056] In some embodiments, optionally, a bypass diode is installed at each joint position of the bus to provide a bypass function for the assembly, and the final output end is provided with an MC4 or DC8020 joint.

[0057] The beneficial effects of the present application are as follows:

[0058] 1. The high-power portable assembly has a small size, and the storage area size of 400W-600W is the same as that of 100W, facilitating storage and transportation.

[0059] 2. The single panels of the high-power portable assembly are connected through a bus and controlled by a switch, and the series and parallel connection can be quickly realized without additional separate parallel bus or series bus.

[0060] 3. The high-voltage system in series in the array process, the bypass diode is installed in the busbar end internal joint, after the single component generates the abnormal power, the current generated by other systems will continue to flow to the busbar output end through the bypass diode, and the power generation efficiency of other components in the whole array will not be affected. At the same time, it is not necessary to install a bypass diode separately for the junction box of the component, thereby saving materials and installation cost.

[0061] In a specific embodiment, as shown in FIG. 3, each photovoltaic component is a 400W-600W high-power portable component, the positive electrode of the first component is connected with the positive output end of the busbar, the negative electrode of the first component is connected with the negative electrode of the busbar, and the positive and negative electrodes of the busbar are connected in parallel with a bypass diode.

[0062] The positive and negative electrodes of the second component are selectively connected with the positive and negative electrodes of the busbar, and the output port needs to meet high voltage, and the output end is a DC2050 or an MC4 universal connector.

[0063] The specific switch mode is shown in FIG. 2 and FIG. 3.

[0064] The second starts, and the busbar joint position corresponding to the photovoltaic component behind is provided with a switch in addition to the bypass diode, A is the switch contact, and the contact is connected with the negative electrode line of the first component.

[0065] When two components are connected in series, the A contact is connected with the B contact of the negative electrode of the busbar, and is disconnected with the C contact.

[0066] When two components are connected in parallel, the A contact is connected with the C contact of the positive electrode of the busbar, and is disconnected with the B contact.

[0067] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A portable photovoltaic power generation device, characterized by comprising: The portable photovoltaic power generation device comprises: a transmission line; a photovoltaic assembly electrically connected to the transmission line; a switching switch arranged on the transmission line and used for switching a connection mode of the photovoltaic assembly and the transmission line, wherein the connection mode comprises series connection and / or parallel connection; a protection device arranged on the switching switch and used for protecting the photovoltaic assembly from being damaged when the photovoltaic assembly is shaded or fails.

2. The portable photovoltaic power generation device according to claim 1, wherein the protection device comprises at least one of a bypass diode, an intelligent diode, a micro-inverter and an optimizer.

3. The portable photovoltaic power generation device according to claim 1, wherein the protection device is arranged in parallel with the switching switch.

4. The portable photovoltaic power generation device according to claim 1, wherein the switching switch comprises a first connection end and a second connection end, the first connection end is connected to the transmission line, the second connection end is connected to the photovoltaic assembly, and the protection device is arranged on the second connection end.

5. The portable photovoltaic power generation device according to claim 1, wherein the protection device is arranged on the photovoltaic assembly and located at a connection position of the photovoltaic assembly and the transmission line.

6. The portable photovoltaic power generation device according to any one of claims 4 to 5, wherein the transmission line comprises a first busbar and a second busbar, the first connection end comprises a first connecting head and a second connecting head, the first connecting head is electrically connected to one of the first busbar and the second busbar, and the second connecting head is switchable between a first position and a second position, the second connecting head is electrically connected to the first busbar when the second connecting head is in the first position, and the second connecting head is electrically connected to the second busbar when the second connecting head is in the second position.

7. The portable photovoltaic power generation device according to claim 6, wherein the photovoltaic assembly is connected in parallel with the transmission line when the second connecting head is in the first position, and the photovoltaic assembly is connected in series with the transmission line when the second connecting head is in the second position.

8. The portable photovoltaic power generation device according to claim 6, wherein the second connection end comprises a third connecting head and a fourth connecting head, the third connecting head is conductive with the first connecting head, and the fourth connecting head is conductive with the second connecting head.

9. The portable photovoltaic power generation device according to claim 8, wherein a positive electrode of the photovoltaic assembly is connected to the fourth connecting head, and a negative electrode of the photovoltaic assembly is connected to the third connecting head.

10. The portable photovoltaic power generation device according to claim 8, wherein a positive electrode of the protection device is connected to the fourth connecting head, and a negative electrode of the protection device is connected to the third connecting head.

11. The portable photovoltaic power device according to any one of claims 1 to 10, characterized in that, Further comprising: an energy storage device electrically connected to the transmission line and used for storing electric energy transmitted by the transmission line.

12. The portable photovoltaic power device of claim 11, wherein, Further comprising: an output terminal arranged on the transmission line, and the transmission line and the energy storage device are electrically connected through the output terminal.

13. The portable photovoltaic power generation device according to claim 12, wherein the output terminal is one of an MC4 connector, a DC8020 connector and a DC2050 connector. Further comprising:

14. The portable photovoltaic power device according to any one of claims 1 to 10, wherein, a voltage detection module arranged on the transmission line and configured to detect a voltage on the transmission line; a control module connected to the voltage detection module and configured to control the switching switch to switch according to the voltage detected by the voltage detection module.

15. The portable photovoltaic power generation device according to any one of claims 1 to 10, wherein the number of photovoltaic assemblies is plural, and any one of the photovoltaic assemblies comprises a plurality of photovoltaic panels connected to each other to form a foldable structure.

16. The portable photovoltaic power generation device according to claim 15, wherein the plurality of photovoltaic panels are connected in parallel by a structural member to form the photovoltaic assembly, so that the photovoltaic assembly is foldable or unfoldable, and when the photovoltaic assembly is in a folded state, the area of the photovoltaic assembly is the same as the area of any one of the photovoltaic panels.

17. The portable photovoltaic power generation device according to claim 16, wherein the power of the photovoltaic panel is P0, and P0 satisfies P0≤100W, and the power of the photovoltaic assembly is P1, and P1 satisfies 400W≤P1≤600W.

18. The portable photovoltaic power generation device according to claim 15, wherein the number of switching switches is plural, and the switching switches correspond to the photovoltaic assemblies one by one.

19. The portable photovoltaic power generation device according to claim 18, wherein the switching switch comprises a series bus or a parallel bus, the series bus is provided with a switch to control the plurality of photovoltaic assemblies to be connected in series, or the parallel bus is provided with a switch to control the plurality of photovoltaic assemblies to be connected in parallel.

20. The portable photovoltaic power generation device according to claim 19, wherein the position of the connector of the series bus or the parallel bus is provided with the protection member. ​ ​ ​ ​ ​ ​ ​

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