Solar power generation equipment and solar power generation systems

Abstract

Embodiments of the present disclosure provide photovoltaic equipment and photovoltaic systems. The photovoltaic equipment includes a photocell array, a photocell panel having a first surface and a second surface facing each other, a plurality of connection terminal members independently mounted on the first surface of the photocell panel and each electrically coupled to a corresponding portion of the photocells in the photocell array, and an inverter device mounted on the first surface of the photocell panel, comprising an elongated hollow case and an inverter circuit located within the elongated hollow case, wherein the inverter circuit is electrically coupled to the plurality of connection terminal members and converts DC power received from the photocell array via the plurality of connection terminal members into AC power, and the elongated hollow case is configured to extend along the direction of arrangement of the plurality of connection terminal members and to abut against the plurality of connection terminal members.

Description

Technical Field

[0001] The present disclosure relates to the field of photovoltaic power generation technology, and more specifically, to photovoltaic power generation equipment and a photovoltaic power generation system including the photovoltaic power generation equipment.

Background Art

[0002] Photovoltaic power generation utilizes the photovoltaic effect of a photovoltaic cell to convert solar energy or light energy into electrical energy, and has many advantages such as being clean, environmentally friendly, and renewable. In order to ensure that the electrical energy generated from the photovoltaic cell can meet the usage requirements of the power grid or load and improve the power generation efficiency of the photovoltaic cell, generally, power conversion equipment, such as a micro-inverter, needs to be deployed to convert the voltage or current generated from the photovoltaic cell into the required voltage and current.

[0003] Currently, generally at the installation site of a solar assembly, it is necessary to electrically connect power conversion equipment such as a micro-inverter to the solar assembly. The installation and connection process is relatively complicated and prone to errors. In addition, since the installation site is generally a place where it is difficult for personnel to approach, such as a roof, the installation difficulty is relatively high and safety problems are likely to occur.

Summary of the Invention

[0004] To at least partially solve the above and other possible problems, embodiments of the present disclosure provide a photovoltaic power generation device and a photovoltaic power generation system.

[0005] According to a first aspect of the present disclosure, a photovoltaic power generation device is provided, which includes a photovoltaic cell array, a photovoltaic panel having a first surface and a second surface facing each other, a plurality of connection terminal members independently mounted on the first surface of the photovoltaic panel and each electrically coupled to a corresponding portion of the photovoltaic cells in the photovoltaic cell array, and an inverter device mounted on the first surface of the photovoltaic panel and including an elongated hollow case and an inverter circuit located within the elongated hollow case, wherein the inverter circuit is electrically coupled to the plurality of connection terminal members and configured to convert DC power received from the photovoltaic cell array via the plurality of connection terminal members into AC power, and the elongated hollow case is configured to extend along the direction of arrangement of the plurality of connection terminal members and to abut against the plurality of connection terminal members.

[0006] In some embodiments of the present disclosure, the photovoltaic cell array includes a first subarray and a second subarray separated from each other by a partition region in the photovoltaic panel, and a plurality of connection terminal members and inverter devices are arranged on the surface of the portion of the first surface corresponding to the partition region.

[0007] In some embodiments of the present disclosure, the width of the side of the elongated hollow case toward the first surface is less than the partition distance between the first subarray and the second subarray.

[0008] In some embodiments of the present disclosure, a long, hollow case is detachably fixed to a plurality of connection terminal members, and an inverter circuit is electrically coupled to the plurality of connection terminal members in a detachable manner.

[0009] In some embodiments of the present disclosure, a plurality of connection terminal members are fixed to a first surface of a photovoltaic panel by adhesive.

[0010] In some embodiments of the present disclosure, each connection terminal member includes a housing, a connection terminal, and a waterproof member.

[0011] In some embodiments of the present disclosure, a photovoltaic cell array includes multiple sets of photovoltaic cells corresponding to multiple connection terminal members, wherein the photovoltaic cells in each set are connected to each other in series, parallel, or series-parallel configuration and are electrically coupled to the corresponding connection terminal members, and an inverter circuit includes a DC-AC converter and multiple DC-DC converters, wherein the multiple DC-DC converters are electrically coupled to multiple connection terminal members at their input side and are connected to each other in series, parallel, or series-parallel at their output side.

[0012] In some embodiments of this disclosure, the inverter circuit includes a gallium nitride power device.

[0013] In some embodiments of this disclosure, the first surface is the back surface of the solar panel, and the second surface is the front surface of the solar panel.

[0014] In some embodiments of the present disclosure, the photovoltaic panel further includes a frame, the height projecting outward from the first surface of the elongated hollow case not exceeding the height projecting outward from the first surface of the frame.

[0015] In some embodiments of the present disclosure, the elongated hollow case includes a heat dissipation mechanism, which is located on a side surface of the elongated hollow case away from a first surface.

[0016] According to a second aspect of this disclosure, a photovoltaic power generation system is provided, which includes photovoltaic equipment according to at least one of the first aspects.

[0017] The summary section of the invention is provided in a simplified form to introduce a selection of concepts, which are further described in the specific embodiments below. The summary section of the invention is not intended to identify any important or main features of the disclosure, nor is it intended to limit the scope of the disclosure. [Brief explanation of the drawing]

[0018] The above and other purposes, features and advantages of this disclosure will become more apparent by describing the exemplary embodiments of this disclosure in more detail with reference to the drawings, where the same reference numerals generally represent the same components. [Figure 1] This diagram shows a schematic representation of the solar power generation system and AC power grid of an embodiment of the present disclosure. [Figure 2] This shows a perspective view of the photovoltaic equipment in the photovoltaic power generation system of the embodiment of this disclosure. [Figure 3] This shows a bottom view of the photovoltaic equipment in the photovoltaic power generation system of the embodiment of this disclosure. [Figure 4] This shows a local perspective view of a photovoltaic power generation device according to an embodiment of the present disclosure. [Figure 5] This diagram shows a perspective view of the inverter device of a solar power generation system according to an embodiment of the present disclosure. [Figure 6] This diagram shows a perspective view of a solar cell panel and a plurality of connection terminal members according to an embodiment of the present disclosure. [Figure 7] This shows a schematic block diagram of an inverter device according to an embodiment of the present disclosure. [Figure 8] The diagrams shown here illustrate the schematics of multiple DC-DC converters in an inverter device according to an embodiment of the present disclosure. [Modes for carrying out the invention]

[0019] The following describes embodiments of the present disclosure in more detail with reference to the drawings. While the drawings illustrate embodiments of the present disclosure, it should be understood that the present disclosure can be implemented in various forms without being limited to the embodiments described herein. Conversely, these embodiments are provided to make the present disclosure more thorough and complete, and to fully communicate the scope of the present disclosure to those skilled in the art. Those skilled in the art can derive alternative technical solutions from the following description without departing from the spirit and scope of the present disclosure.

[0020] As used herein, the term "comprising" and its variations represent open inclusion, i.e., "including but not limited to". Unless otherwise specified, the term "or" represents "and / or". The term "based on" represents "at least partially based on". The terms "an example" and "one embodiment" represent "at least one embodiment". The following may include other explicit and implicit definitions.

[0021] Embodiments of the present disclosure provide an improved solar power generation device. In the improvement scheme, the case of the inverter device is formed in a long shape and extends along and is arranged along a plurality of connection terminal members, whereby the entire inverter device can be pre-mounted on the solar panel and joined to the plurality of connection terminal members. Thereby, the assembly of the solar assembly and the inverter device can be completed in advance before shipment, which avoids the complexity and inconvenience of on-site wiring and installation, reduces the amount of work for installing the solar assembly on-site, and facilitates the transportation of the solar assembly and its accessories.

[0022] FIG. 1 shows a schematic diagram of a solar power generation system 10 and an AC power grid 20 according to an embodiment of the present disclosure. As shown in FIG. 1, the solar power generation system 10 includes one or more solar power generation devices, for example, a first set of solar power generation devices 100-1, 100-2, 100-3... 100-N-1, 100-N and a second set of solar power generation devices 100-1', 100-2', 100-3'... 100-N-1', 100-N'. By way of example, the first set of solar power generation devices 100-1, 100-2, 100-3... 100-N-1, 100-N are connected in series with each other and connected to the live wire L, neutral wire N and ground wire PE of the AC power grid 20, and the second set of solar power generation devices 100-1', 100-2', 100-3'... 100-N-1', 100-N' are connected in series with each other and output to the live wire L, neutral wire N and ground wire PE of the AC power grid 20. The AC power grid 20 may be, for example, a distribution grid, and thereby receives and transmits the power output from the solar power generation system 10. However, as can be understood, in addition to the distribution grid, the solar power generation system 10 may be coupled to other types of AC devices or loads, and the present disclosure is not limited thereto.

[0023] FIG. 2 and FIG. 3 show a perspective view and a bottom view of a solar power generation device 100 in the solar power generation system 10 according to an embodiment of the present disclosure. The solar power generation device 100 may be one of the first set of solar power generation devices 100-1, 100-2, 100-3... 100-N-1, 100-N and the second set of solar power generation devices 100-1', 100-2', 100-3'... 100-N-1', 100-N'.

[0024] As shown in Figures 2 and 3, the photovoltaic power generation equipment 100 includes a photovoltaic panel 110, which includes a photovoltaic cell array and a first surface F1 and a second surface F2 facing each other. For example, the photovoltaic cell array is composed of a plurality of photovoltaic cells, and at least one of the first surface F1 and the second surface F2 of the photovoltaic panel 110 may receive sunlight, thereby allowing the plurality of photovoltaic cells in the photovoltaic panel 110 to convert light energy into electrical energy. In one example, the photovoltaic panel 110 may be a double-glass photovoltaic assembly, employing a double-layer glass packaging with high light transmittance, sandwiching the photovoltaic cells between the double-layer glass, thereby allowing both surfaces of the photovoltaic panel 110 to receive light energy. The photovoltaic panel 110 may also include other members or elements as needed, such as a frame or backplate, packaging adhesive film, etc. In one example, the photovoltaic cells in the photovoltaic panel 110 include crystalline silicon cells, that is, a photovoltaic cell array is formed by a plurality of crystalline silicon cell cells. In another example, the photocells in the photocell panel 110 include a stacked battery formed from perovskite cells and crystalline silicon cells. In the stacked battery, a battery cell array formed from multiple crystalline silicon cells is installed on the photocell panel 110, and a film layer of perovskite cells is further covered on the crystalline silicon cell array. By stacking sheet-like perovskite cells and sheet-like crystalline silicon cell arrays in a stacked manner, two types of photocells can be placed in the same solar assembly, thereby enabling the combination of cells with different band gaps to achieve segmented utilization of the solar spectrum. This results in more efficient light absorption and conversion, effectively improves power conversion efficiency, reduces energy loss, and does not occupy additional floor space.

[0025] In some embodiments of this disclosure, the photovoltaic cell array includes a first subarray 111A and a second subarray 111B separated from each other by a partition region 112 in the photovoltaic panel 110. Specifically, the photovoltaic cell array in the photovoltaic panel 110 may be divided into two parallel-connected subarrays and arranged in two opposing regions, which may be separated by a partition region 112. In other words, no photovoltaic cells are located in the partition region 112. By installing two parallel-connected subarrays, the internal resistance of the entire photovoltaic cell can be effectively reduced, improving heat dissipation of the cell and helping to reduce the risk of hot spots.

[0026] In some embodiments of this disclosure, a photovoltaic cell array comprises multiple sets of photovoltaic cells 111-1, 111-2, 111-3, wherein the photovoltaic cells in each set are connected to one another in series, parallel, or series-parallel configurations. For example, the first and second rows of cells in a first subarray 111A and the first and second rows of cells in a second subarray 111B may constitute the first set of photovoltaic cells 111-1, where the first and second rows of cells in the first subarray 111A may be connected in series to form one battery string, or the first and second rows of cells in the second subarray 111B may be connected in series to form another battery string, and the two battery strings may be further connected in parallel to each other and thereby connected to downstream equipment. The second and third sets of photovoltaic cells may be formed in a similar manner. Specifically, the battery cells in the third and fourth rows of the first sub-array 111A and the battery cells in the third and fourth rows of the second sub-array 111B may constitute a second set of solar cell cells 111-2. Here, the battery cells in the third and fourth rows of the first sub-array 111A may be connected in series to form one battery string, while the battery cells in the third and fourth rows of the second sub-array 111B may be connected in series to form another battery string, and the two battery strings may be further connected in parallel. Furthermore, the fifth and sixth rows of battery cells in the first subarray 111A and the fifth and sixth rows of battery cells in the second subarray 111B may constitute a third set of photovoltaic cells 111-3, where the fifth and sixth rows of battery cells in the first subarray 111A may be connected in series to form one battery string, while the fifth and sixth rows of battery cells in the second subarray 111B may be connected in series to form another battery string, and the two battery strings may be further connected in parallel. To make it clear, the number of sets, rows, and columns of photovoltaic cells shown in the figure are merely illustrative, and the photovoltaic panel 110 may have more or fewer sets, rows, and columns.

[0027] According to embodiments of the present disclosure, the photovoltaic power generation equipment 100 further includes a plurality of connection terminal members 120-1, 120-2, and 120-3, which are independently mounted on a first surface F1 of the photovoltaic panel 110 and are each electrically coupled to a corresponding portion of the photovoltaic cells in the photovoltaic cell array. Specifically, each connection terminal member is independent of the other connection terminal members and is an electrical interface for providing power output to a corresponding set or portion of the photovoltaic cells. For example, connection terminal member 120-1 may be coupled to a first set of photovoltaic cells 111-1, i.e., a battery cell string formed by the first and second rows of battery cells of a first subarray 111A and a battery cell string formed by the first and second rows of battery cells of a second subarray 111B are connected in parallel to each other and coupled to the connection terminals in connection terminal member 120-1. Similarly, the connection terminal member 120-2 may be connected to a second set of solar cell cells 111-2, that is, the battery cell string formed by the third and fourth rows of battery cells of the first subarray 111A and the battery cell string formed by the third and fourth rows of battery cells of the second subarray 111B are connected in parallel to each other and connected to the connection terminal of the connection terminal member 120-2. The connection terminal member 120-3 may be connected to a third set of solar cell cells 111-3, that is, the battery cell string formed by the fifth and sixth rows of battery cells of the first subarray 111A and the battery cell string formed by the fifth and sixth rows of battery cells of the second subarray 111B are connected in parallel to each other and connected to the connection terminal of the connection terminal member 120-3.

[0028] According to embodiments of the present disclosure, the photovoltaic power generation equipment 100 further includes an inverter device 130, which is mounted on a first surface F1 of the photovoltaic panel 110. The inverter device 130 includes an elongated hollow case 131 and an inverter circuit 132 located within the elongated hollow case 131 (see Figure 7). The inverter circuit 132 is electrically coupled to a plurality of connection terminal members 120-1, 120-2, 120-3 and converts DC power from the photovoltaic cell array received via the plurality of connection terminal members 120-1, 120-2, 120-3 into AC power. The elongated hollow case 131 extends along the arrangement direction of the plurality of connection terminal members 120-1, 120-2, 120-3 and is configured to abut against the plurality of connection terminal members 120-1, 120-2, 120-3.

[0029] Specifically, the inverter device 130 is mounted on the same surface as a plurality of connection terminal members 120-1, 120-2, and 120-3, and is connected to the plurality of connection terminal members 120-1, 120-2, and 120-3, thereby converting the DC power generated by the solar cells in the solar cell array into AC power, which is then output to downstream equipment such as an AC power grid 20. The inverter device 130 and its case 131 are formed in an elongated shape and extend along the direction of arrangement of the multiple connection terminal members 120-1, 120-2, and 120-3, and abut against the connection terminal members. Therefore, the inverter device 130 can be quickly and conveniently pre-attached and joined to the multiple connection terminal members 120-1, 120-2, and 120-3, thereby forming a single unit with the solar cell panel 110 and the multiple connection terminal members 120-1, 120-2, and 120-3. Furthermore, these components do not need to be transported individually, but are transported and installed as a whole, eliminating the need for additional on-site wiring and installation steps. This method simplifies the transportation and on-site installation of solar power generation equipment, thereby avoiding potential problems associated with on-site installation, such as the complexity of installation, wiring errors, and personnel safety issues.

[0030] In some embodiments of this disclosure, a plurality of connection terminal members 120-1, 120-2, 120-3 and an inverter device 130 are arranged on the surface of a portion of the first surface F1 corresponding to a partition region 112. Specifically, since the connection terminal members 120-1, 120-2, 120-3 and the inverter device 130 are all opaque materials, they may block light and affect the light reception by the photovoltaic cells. The partition region 112 is the area between two subarrays 111A and 111B of the photovoltaic cells, and no photovoltaic cells are attached to it. By arranging the connection terminal members 120-1, 120-2, 120-3 and the inverter device 130 in the partition region 112, the connection terminal members and the inverter device can be integrated onto the photovoltaic panel while avoiding adverse effects on the light energy reception by the photovoltaic cells, thereby preventing a reduction in the power generation efficiency of the photovoltaic equipment.

[0031] In some embodiments of this disclosure, the width W1 of the side of the elongated hollow case 131 facing the first surface F1 is smaller than the partition distance W2 between the first subarray 111A and the second subarray 111B. In this manner, the inverter device 130 is mounted in a fully integrated manner within the partition area 112 of the solar panel 110 without shielding the solar cells, thereby minimizing the impact of these auxiliary components on power generation efficiency.

[0032] In some embodiments of this disclosure, the photovoltaic panel 110 further includes a frame 113, and the height protruding outward from the first surface F1 of the elongated hollow case 131 does not exceed the height protruding outward from the first surface F1 of the frame 113. For example, the frame 113 is used to fix components such as photovoltaic cells and glass, and has a certain thickness, which is also the actual thickness of the photovoltaic panel 110. By ensuring that the height protruding outward from the elongated hollow case 131 does not exceed the height protruding outward from the first surface F1 of the frame 113, it is possible to ensure that the overall thickness of the photovoltaic equipment 100 does not change due to the mounting of the inverter device 130 and its case 131. This allows multiple photovoltaic equipment 100 to be stacked back-to-back during transport, which is advantageous because photovoltaic equipment with pre-installed inverter devices can be transported in a more compact and stable manner, thereby maximizing the convenience of attaching, detaching, and transporting the photovoltaic equipment.

[0033] In some embodiments of this disclosure, the elongated hollow case 131 includes a heat dissipation mechanism (not shown) located on a side surface away from the first surface F1 of the elongated hollow case 131. For example, the heat dissipation mechanism may consist of one or more heat conductors and / or one or more heat dissipation openings for conducting and releasing heat from within the elongated hollow case 131 to the external environment. Such a configuration is advantageous for improving heat dissipation of the inverter device 130 and effectively avoiding adverse effects on the photovoltaic cells due to heat generated from the inverter device 130.

[0034] In some embodiments of this disclosure, the first surface F1 is the back surface of the photovoltaic panel 110, and the second surface F2 is the front surface of the photovoltaic panel 110. Specifically, the back surface of the photovoltaic panel 110 is the side facing the front surface, and after the photovoltaic power generation equipment 100 is installed, the front surface of the photovoltaic panel 110 faces the sun. By installing the inverter device 130 and the multiple connection terminal members 120-1, 120-2, and 120-3 on the back surface of the photovoltaic panel 110, the influence of these members on light reception can be avoided, and the appearance of the photovoltaic power generation equipment can be made more aesthetically pleasing and simpler.

[0035] Figure 4 shows a local perspective view of the photovoltaic power generation equipment 100 of an embodiment of the present disclosure, Figure 5 shows a perspective view of the inverter device 130 of an embodiment of the present disclosure, and Figure 6 shows a perspective view of the photovoltaic panel 110 and a plurality of connection terminal members 120-1, 120-2, and 120-3 of an embodiment of the present disclosure.

[0036] In some embodiments of this disclosure, the elongated hollow case 131 of the inverter device 130 is detachably fixed to a plurality of connection terminal members 120-1, 120-2, and 120-3, and the inverter circuit 132 is electrically coupled to the plurality of connection terminal members 120-1, 120-2, and 120-3 in a removable manner. For example, fixing columns 1311, 1312, and 1313 may be installed on the elongated hollow case 131, and fixing holes for fitting onto the fixing columns 1311, 1312, and 1313 may be provided in the connection terminal members 120-1, 120-2, and 120-3, thereby allowing the case 131 to be easily mechanically fixed to the connection terminal members. Furthermore, electrical plugs or plug ports 1332, 1333, and 1334 that can be mated to each other on the connection terminals of the connection terminal members 120-1, 120-2, and 120-3 may be installed on the inverter device 130. For example, the electrical plugs or plug ports 1332, 1333, and 1334 may be either plugs or sockets. By fixing the case 131 to the connection terminal members and simultaneously connecting using the electrical plugs or plug ports, an electrical connection can be achieved between the internal circuitry of the inverter device 130 and the connection terminal members and the solar cell cells. To make it clear, the detachable fixing and removable electrical connection between the inverter device 130 and the multiple connection terminal members 120-1, 120-2, and 120-3 may be achieved by other suitable methods, such as snap connections or screw connections. This method allows the inverter device 130 to be easily mounted on the solar cell panel 110, and in the event of a malfunction, the inverter device 130 can be easily replaced and repaired, thereby significantly reducing the difficulty and cost of installing and replacing the inverter device.

[0037] In some embodiments of this disclosure, a plurality of connection terminal members 120-1, 120-2, and 120-3 are fixed to the first surface F1 of the photovoltaic panel 110 by adhesive. For example, adhesive can be used to attach the connection terminal members 120-1, 120-2, and 120-3 to the glass layer of the photovoltaic panel 110, thereby enabling the attachment of the connection terminal members 120-1, 120-2, and 120-3 and avoiding damage to the surface packaging member, such as glass.

[0038] In some embodiments of this disclosure, each of the terminal members 120-1, 120-2, and 120-3 includes a housing 121-1, 121-2, and 121-3, a terminal 122-1, 122-2, and 122-3, and a waterproof member. For example, by housing the terminals 122-1, 122-2, and 122-3 in housings 121-1, 121-2, and 121-3 respectively, the terminals can be prevented from being exposed to the external environment. The relatively robust housings 121-1, 121-2, and 121-3 are also advantageous for stably and reliably attaching the terminal members to the photovoltaic panel 110 and to the case 131 of the inverter device 130. Furthermore, waterproof materials such as sealing strips or sealing films are installed inside the housings 121-1, 121-2, and 121-3. These materials effectively prevent water from the external environment from entering the inside of the solar cell panel 110 through the connection terminal members, thereby protecting the internal solar cell cells from the influence of the external environment.

[0039] Figure 7 shows a schematic block diagram of an inverter device 130 according to an embodiment of the present disclosure. As shown in Figure 7, in some embodiments of the present disclosure, the inverter device 130 includes a case 131 and an inverter circuit 132, the inverter circuit 132 includes a DC-AC converter 1321 and a plurality of DC-DC converters 1322, 1323, and 1324, the plurality of DC-DC converters 1322, 1323, and 1324 are suitable for electrical coupling to a plurality of connection terminal members 120-1, 120-2, and 120-3 on their input side, and are connected in series with each other on their output side. In addition to the connection method in which the plurality of DC-DC converters 1322, 1323, and 1324 shown in Figure 7 are connected in series with each other, the plurality of DC-DC converters 1322, 1323, and 1324 may be connected in parallel with each other or in series-parallel with each other on their output side.

[0040] For example, multiple DC-DC converters 1322, 1323, and 1324 may be coupled to plug ports 1332, 1333, and 1334 on case 131, and respectively, and also to multiple connection terminal members 120-1, 120-2, and 120-3 via plug ports 1332, 1333, and 1334. The multiple DC-DC converters 1322, 1323, and 1324 are coupled to a DC-AC converter 1321 on their output side and are coupled to other photovoltaic equipment or an AC power grid 20 via ports 1341 and 1342. As a result, DC-DC converters 1322, 1323, and 1324 perform appropriate DC power conversion for the DC power generated by the first set of solar cells 111-1, the second set of solar cells 111-2, and the third set of solar cells 111-3, respectively, and perform maximum power point tracking (MPPT) operations to adjust the output voltage and current of the corresponding set of solar cells to the maximum power point. This allows for independent MPPT operation for each set of solar cells, thereby providing greater flexibility and higher power generation efficiency. Then, DC-AC converter 1321 converts the DC power output from the multiple DC-DC converters 1322, 1323, and 1324 into AC power and outputs it externally. To ensure clarity, the number of DC-DC converters, plug ports, connection terminals, and battery cell assemblies is approximate, and more or fewer DC-DC converters, plug ports, connection terminals, and battery cell assemblies may be installed as needed.

[0041] Because multiple DC-DC converters 1322, 1323, and 1324 are employed, there is no need to install a distribution box and bypass diodes for the solar cell cells. In a typical design, a solar assembly needs to be equipped with a distribution box to extract the DC power generated by the solar assembly to downstream circuits such as inverter devices. The distribution box typically contains bypass diodes connected in parallel to each set of battery cells in a set of multiple battery cells. These bypass diodes can bypass the corresponding set of battery cells in the solar assembly under certain circumstances. For example, if a set of battery cells is shielded or partially damaged, a bypass diode connected in parallel to this set of battery cells can bypass it to prevent damage due to the hot spot effect, ensuring that the other battery cells can continue to operate normally. However, even if a set of battery cells is partially shielded or partially damaged, such a bypass diode will cause the entire bypassed set of battery cells to stop outputting power. Furthermore, since the distribution box and its bypass diodes are components that are relatively prone to damage and failure in solar power systems, it is necessary to repair and replace the distribution box and its bypass diodes at all times during the service life of the solar power system and its solar assembly. By installing multiple DC-DC converters in the inverter device 130, the power generated by each set of solar cells among multiple sets of solar cells can be directly adjusted and output. For example, if shielding occurs in a set of solar cells, the corresponding DC-DC converter can adjust the output voltage of this set of solar cells and output it externally without bypassing it. This eliminates the need to install conventional bypass diodes and distribution boxes in the solar assembly. This method not only improves the reliability of the system by eliminating the distribution box and its bypass diodes, which have a relatively high failure rate, but also improves energy utilization efficiency by ensuring that a shielded or partially damaged set of solar cells can still output a certain amount of power.

[0042] Figure 8 shows exemplary circuit diagrams of multiple DC-DC converters 1322, 1323, and 1324 in an inverter device 130 of an embodiment of the present disclosure. As shown in Figure 8, the multiple DC-DC converters 1322, 1323, and 1324 are DC boost converters. For example, DC-DC converter 1322 includes an inductor L1-1, power switching devices Q1-1 and Q2-1, and capacitors C1-1 and C2-1, with one side of capacitor C1-1 coupled to plug port 1332; DC-DC converter 1323 includes an inductor L1-2, power switching devices Q1-2 and Q2-2, and capacitors C1-2 and C2-2, with one side of capacitor C1-2 coupled to plug port 1333; and DC-DC converter 1324 includes an inductor L1-3, power switching devices Q1-3 and Q2-3, and capacitors C1-3 and C2-3, with one side of capacitor C1-3 coupled to plug port 1334. By controlling the power switching devices Q1-1, Q1-2, and Q1-3 (e.g., in PWM control mode), boost and MPPT operations can be performed on each set of battery cells coupled to the connection terminal members 120-1, 120-2, and 120-3, respectively. Although several DC-DC converters 1322, 1323, and 1324 have been described using the BOOST converter as an example, these DC-DC converters 1322, 1323, and 1324 may be implemented as other types of DC-DC conversion circuits, such as DC buck (BUCK) converters, as required by actual needs.

[0043] Furthermore, if the solar cell panel 110 employs the stacked solar cell described in the preceding paragraph, the output voltage level of the perovskite cell is generally much higher than that of the crystalline silicon cell. Therefore, the output of the crystalline silicon cell array can be coupled to multiple DC-DC converters 1322, 1323, and 1324 to boost the relatively low voltage output from the crystalline silicon cell array to a voltage nearly equal to that of the perovskite cell. Alternatively, the output of the perovskite cell may be directly coupled to the DC-AC converter 1321. This allows for the effective integration of the power output from the two solar cells into a single output to the DC-AC converter 1321, thereby enabling power output to the power grid or load.

[0044] In some embodiments of this disclosure, the inverter circuit 132 includes a gallium nitride power device. For example, the power switching devices in a plurality of DC-DC converters 1322, 1323, 1324 and a DC-AC converter 1321 may employ gallium nitride power devices. Generally speaking, in an inverter device 130, the power switching devices occupy a relatively large space. Gallium nitride power devices have higher power density, smaller volume, and stronger high-temperature stability. By employing gallium nitride power devices, the size of the space occupied by the power switching devices can be reduced, thereby significantly reducing the volume of the inverter device 130 and allowing for the use of a smaller case 131, which is further advantageous for pre-mounting and integrating the inverter device 130 into a partition area 112 on a solar panel 110.

[0045] In the embodiments of this disclosure, the inverter device can be pre-installed and integrated onto a solar panel by forming it into a long shape and attaching it in contact with a plurality of connection terminal members. This is advantageous for transporting solar equipment, reduces the amount of work and installation costs for on-site installation, and eliminates potential wiring errors and personnel safety issues associated with on-site installation.

[0046] The teachings provided in the above description and the associated drawings will make many of the modifications and other embodiments of the disclosure provided herein known to the articulates of the art relating to the disclosure. Therefore, it should be understood that the embodiments of the disclosure are not limited to the specific embodiments disclosed, and that the modifications and other embodiments are intended to be included within the scope of the disclosure. While the above description and the associated drawings describe exemplary embodiments against the backdrop of several exemplary combinations of components and / or functions, it should be understood that different combinations of components and / or functions may be provided by alternative embodiments without departing from the scope of the disclosure. In this regard, for example, other combinations of components and / or functions that are explicitly described above are also expected to be included within the scope of the disclosure. Specific terminology is used here, but it is used only in a general and descriptive sense and is not intended to be restrictive.

Claims

1. A solar power generation device (100), A photovoltaic cell array (111A, 111B) and a photovoltaic panel (110) including a first surface (F1) and a second surface (F2) facing each other, A plurality of connection terminal members (120-1, 120-2, 120-3) are independently mounted on the first surface (F1) of the solar cell panel (110) and are electrically coupled to a corresponding portion of the solar cell cells in the solar cell arrays (111A, 111B), An inverter device (130) is mounted on the first surface (F1) of the solar cell panel (110) and includes an elongated hollow case (131) and an inverter circuit (132) located inside the elongated hollow case (131), wherein the inverter circuit (132) is electrically coupled to the plurality of connection terminal members (120-1, 120-2, 120-3) and the plurality of connection terminal members (120- A solar power generation device (100) comprising: an inverter device (130) configured to convert DC power received from the solar cell array (111A, 111B) via (3) into AC power, wherein the elongated hollow case (131) extends along the arrangement direction of the plurality of connection terminal members (120-1, 120-2, 120-3) and is configured to abut against the plurality of connection terminal members (120-1, 120-2, 120-3).

2. The photovoltaic cell array (111A, 111B) includes a first subarray (111A) and a second subarray (111B) separated from each other by a partition region (112) in the photovoltaic panel (110), and the plurality of connection terminal members (120-1, 120-2, 120-3) and the inverter device (130) are arranged on the surface of the portion of the first surface (F1) corresponding to the partition region (112), the photovoltaic power generation equipment (100) according to claim 1.

3. The photovoltaic power generation device (100) according to claim 2, wherein the width (W1) of the side surface of the elongated hollow case (131) toward the first surface (F1) is smaller than the partition distance (W2) between the first subarray (111A) and the second subarray (111B).

4. The photovoltaic power generation equipment (100) according to any one of claims 1 to 3, wherein the elongated hollow case (131) is detachably fixed to the plurality of connection terminal members (120-1, 120-2, 120-3), and the inverter circuit (132) is electrically coupled to the plurality of connection terminal members (120-1, 120-2, 120-3) in a removable manner.

5. The photovoltaic power generation device (100) according to any one of claims 1 to 3, wherein the plurality of connection terminal members (120-1, 120-2, 120-3) are fixed to the first surface (F1) of the photovoltaic panel (110) by adhesive.

6. Each connection terminal member (120-1, 120-2, 120-3) includes a housing (121-1, 121-2, 121-3), a connection terminal (122-1, 122-2, 122-3), and a waterproof member, as described in claim 1, for the photovoltaic power generation equipment (100).

7. The photovoltaic cell arrays (111A, 111B) include multiple sets of photovoltaic cells (111-1, 111-2, 111-3) corresponding to the multiple connection terminal members (120-1, 120-2, 120-3), and the photovoltaic cells in each set of photovoltaic cells (111-1, 111-2, 111-3) are connected to each other in series, parallel, or series-parallel configurations, and are electrically coupled to the corresponding connection terminal members (120-1, 120-2, 120-3). The solar power generation equipment (100) according to claim 1, wherein the inverter circuit (130) includes a DC-AC converter (1321) and a plurality of DC-DC converters (1322, 1323, 1324), and the plurality of DC-DC converters (1322, 1323, 1324) are electrically coupled to the plurality of connection terminal members (120-1, 120-2, 120-3) on their input side, and are connected in series, in parallel, or in series-parallel on their output side.

8. The photovoltaic power generation equipment (100) according to claim 1, wherein the inverter circuit (132) includes a gallium nitride power device.

9. The solar power generation device (100) according to claim 1, wherein the first surface (F1) is the back surface of the solar cell panel (110), and the second surface (F2) is the front surface of the solar cell panel (110).

10. The photovoltaic power generation device (100) according to claim 1, wherein the photovoltaic panel (110) further includes a frame (113), and the height of the elongated hollow case (131) protruding outward from the first surface (F1) does not exceed the height of the frame (113) protruding outward from the first surface (F1).

11. The photovoltaic power generation device (100) according to claim 1, wherein the elongated hollow case (131) includes a heat dissipation mechanism, and the heat dissipation mechanism is located on a side surface of the elongated hollow case (131) that is separated from the first surface (F1).

12. A photovoltaic power generation system (10) comprising a photovoltaic power generation device (100) according to at least one of claims 1 to 11.

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