Curved surface solar panel system

Abstract

The embodiment of the utility model relates to the field of photovoltaic technology, and provides a curved surface solar panel system. The curved-surface solar panel system comprises a plurality of power generation units which are connected in series, each power generation unit comprises a curved-surface solar panel and a voltage and current adjusting module which is connected with the curved-surface solar panel in series, the curved-surface solar panel comprises a wave crest part, and the wave crest part comprises a light receiving surface and a backlight surface which are opposite to each other. The voltage and current adjusting module comprises a main body part with a circuit and a clamping part connected with the main body part, the clamping part is clamped on the wave crest part, and the main body part is located on the side, where the backlight face is located, of the wave crest part. The curved-surface solar panel system is beneficial for solving the problem of low power generation efficiency of the curved-surface solar panel system caused by the shape or installation of the curved-surface solar panel.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a curved solar panel system. Background Art

[0002] Existing curved solar panel systems usually include multiple curved solar panels connected in series. When sunlight does not irradiate the curved solar panel vertically, the trough of the curved solar panel is easily blocked by the peak, resulting in a shadow area, which in turn leads to a current mismatch problem. In addition, in existing curved solar panel systems, the angles of the curved solar panels installed at different positions to the sunlight are different, resulting in a large difference in the amount of radiation absorbed by the curved solar panels at different positions, which in turn leads to low power generation efficiency of the curved solar panel system. Utility Model Content

[0003] The embodiment of the present application provides a curved solar panel system. The curved solar panel system includes a plurality of power generation units connected in series, each of the power generation units includes a curved solar panel and a voltage and current regulating module connected in series with the curved solar panel, the curved solar panel includes a crest portion, the crest portion includes an opposite light-receiving surface and a backlight surface, the voltage and current regulating module includes a main body portion having a circuit and a clamping portion connected to the main body portion, the clamping portion is clamped on the crest portion, and the main body portion is located on the side of the crest portion where the backlight surface is located.

[0004] In the curved solar panel system described above, each curved solar panel in each power generation unit is connected in series with a voltage and current regulating module to ensure that the voltage and current generated by each curved solar panel are controlled by a corresponding voltage and current regulating module, and then the voltage and current of the curved solar panel in each power generation unit are adjusted by the voltage and current regulating module to the next power generation unit. In this way, when a curved solar panel is partially blocked due to the shape of the curved surface or other reasons (such as shade), or the amount of radiation absorbed is very different due to factors such as differences in installation angles, it can be known from power P = voltage V × current I: when ensuring that the power P is consistent, the voltage and current regulating module increases the current I of the curved solar panel and reduces the voltage of the curved solar panel, so that its current I is consistent with the current of other curved solar panels, so as not to cause the entire series circuit to limit the current and affect the power output of other curved solar panels in the series circuit, thereby improving the power generation efficiency of the entire curved solar panel system and ensuring the power maximization of the entire curved solar panel system.

[0005] In addition, the voltage and current regulating module is fixed to the curved solar panel, which is easy to install. Moreover, the main body is located on the side where the backlight surface of the crest part is located, which is beneficial to avoid the main body affecting the absorption of light by the crest part, and to avoid direct exposure of the main body to sunlight and affecting the service life of the main body.

[0006] In some embodiments, the main body includes a top surface adapted to the backlight surface and a bottom surface opposite to the top surface, the top surface includes a plane and a first inclined surface and a second inclined surface respectively connected to opposite sides of the plane, the first inclined surface and the second inclined surface are respectively inclined relative to the plane toward the bottom surface.

[0007] In some embodiments, the holding portion includes a slot engaged with the crest portion, and an opening of the slot faces the side where the main body portion is located.

[0008] In some embodiments, the card slot includes a top wall in contact with the light receiving surface and a bottom wall opposite to the top wall, and the bottom wall is connected to the top surface.

[0009] In some embodiments, the clamping portion further includes a guide slope connected to the top wall, and the guide slope is inclined relative to the top wall toward a side away from the bottom wall.

[0010] In some embodiments, the clamping portion includes a first clamping portion and a second clamping portion that are spaced apart, the bottom wall of the first clamping portion is connected to the first inclined surface and is flush with the first inclined surface, and the bottom wall of the second clamping portion is connected to the second inclined surface and is flush with the second inclined surface.

[0011] In some embodiments, the plurality of holding portions are symmetrically distributed on the main body.

[0012] In some embodiments, the voltage and current regulating module further includes a plurality of cables electrically connected to the circuit and located at one end of the main body connected to the clamping portion.

[0013] In some embodiments, the curved solar panel further includes a trough portion connecting the crest portions.

[0014] In some embodiments, the acquisition rate of the voltage and current regulation module is less than 1KSPS. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram comparing the amount of solar radiation received by curved solar panels installed in different orientations at the same time.

[0016] Figure 2 Schematic diagram comparing the amount of solar radiation received by curved solar panels and flat solar panels at different times.

[0017] Figure 3 Schematic diagram of the power variation over time of curved solar panels and flat solar panels at different installation orientations.

[0018] Figure 4 It is a simplified schematic diagram of the circuit of a curved solar panel system according to an embodiment of the present application.

[0019] Figure 5 Schematic diagram of the structure of a voltage and current regulating module in a curved solar panel system according to an embodiment of the present application.

[0020] Figure 6 It is a schematic structural diagram of a voltage and current regulating module and a curved solar panel in a curved solar panel system according to an embodiment of the present application before being assembled.

[0021] Figure 7 It is a schematic structural diagram of a voltage and current regulating module and a curved solar panel after being assembled in a curved solar panel system according to an embodiment of the present application.

[0022] Figure 8 This is a schematic diagram of a curved solar panel system installed on a roof according to an embodiment of the present application.

[0023] Fig. 9 This is a partial schematic diagram of a curved solar panel system after being installed on a roof according to an embodiment of the present application.

[0024] Fig.10 This is a schematic diagram showing another perspective of a curved solar panel system installed on a roof according to an embodiment of the present application.

[0025] Fig.11 FIG. 1 is a schematic diagram of the installation position of a curved solar panel system according to an embodiment of the present application.

[0026] Description of main component symbols:

[0027] Curved Solar Panel System 100

[0028] Power generation unit 110

[0029] Curved solar panels 10, 10e, 10w, 10s, 10n, 10ws, 10es

[0030] Flat solar panel 10'

[0031] Battery string 1, 2, 3, 1', 2', 3'

[0032] Peak 11

[0033] Light receiving surface 10a

[0034] Backlight surface 10b

[0035] Valley 12

[0036] Positive output terminals 131, 244

[0037] Negative output terminals 132, 243

[0038] Voltage and current regulation module 20

[0039] Main body 21

[0040] Top surface 211

[0041] Plane 21a

[0042] First inclined surface 21b

[0043] Second inclined surface 21c

[0044] Bottom surface 212

[0045] Clamping part 22

[0046] The first holding portion 221

[0047] The second holding portion 222

[0048] Card slot 22s

[0049] Top wall 22a

[0050] Bottom wall 22b

[0051] Guide slope 22c

[0052] Cable 23

[0053] Negative input terminal 241

[0054] Positive input terminal 242

[0055] Mounting surface S1, S2, S3, S4 DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0057] like Figure 1As shown, due to the structure of the curved solar panel 10 itself, there is an obvious difference in the total solar radiation that the curved solar panels 10 installed in different orientations (such as the curved solar panel 10e installed in the east orientation, the curved solar panel 10w installed in the west orientation, the curved solar panel 10s installed in the south orientation, the curved solar panel 10n installed in the north orientation, the curved solar panel 10ws installed in the southwest orientation, and the curved solar panel 10es installed in the southeast orientation) can receive at the same time.

[0058] Specifically, if the distribution of battery strings is not considered and only the irradiation area is considered, when the sunlight is in the south at noon, the total effective irradiation area of ​​all curved solar panels 10s installed in the south is H1, the total effective irradiation area of ​​all curved solar panels 10es installed in the southeast is H2, the angle between the plane where each curved solar panel 10es installed in the southeast is located and the sunlight is θ1, the total effective irradiation area of ​​all curved solar panels 10ws installed in the southwest is H3, and the angle between the plane where each curved solar panel 10ws installed in the southwest is θ2.

[0059] Assuming that the number of curved solar panels 10 in each installation orientation is the same, and the actual area of ​​each curved solar panel 10 that can receive light is the same, then due to different installation angles, the effective irradiation area H1, the effective irradiation area H2 and the effective irradiation area H3 satisfy: H2 = H1 × sinθ1, H3 = H1 × sinθ2. According to the series circuit, it can be seen that: when the current is equal, the effective irradiation area of ​​the curved solar panel will change due to the change in the installation angle. According to P = H × Pmax × η × σ = I × V, H = sinθ × H1; it can be seen that: I = sinθ × H1 × Pmax * η × σ / V. P is the actual power generation power of the curved solar panel, H is the effective irradiation area of ​​the curved solar panel, Pmax is the rated power of the curved solar panel, η is the photovoltaic coefficient under standard test conditions (Standard Test Conditions, STC), σ is the temperature coefficient, I is the actual current of the curved solar panel, V is the actual voltage of the curved solar panel, and θ is the angle between the curved solar panel and the sunlight. It can be seen that the larger θ is, the larger I is, and the smaller θ is, the smaller I is. Therefore, when θ is inconsistent due to construction errors during installation, the current of the entire series circuit will be limited due to the small θ angle of a certain curved solar panel, which will seriously affect the power generation.

[0060] like Figure 2 As shown, in the comparison between the curved solar panel 10 and the flat solar panel 10', the curved solar panel 10 includes a battery string 1, a battery string 2 and a battery string 3 connected in series, while the flat solar panel 10' includes a battery string 1', a battery string 2' and a battery string 3' connected in series. Figure 2As shown in Figure (a), in the morning, the battery string 2 in the curved solar panel 10 is blocked and cannot be directly illuminated by sunlight, but can only receive part of the scattered light and reflected light, resulting in a very small current output by the battery string 2, and thus a serious current limiting in the entire series current, which affects the power generation efficiency of the entire curved solar panel 10. In the flat solar panel 10', in the morning, all the battery strings, namely battery string 1', battery string 2' and battery string 3', have the same light receiving area and irradiation intensity, so there is no effect on the power generation power of the flat solar panel 10'. Similarly, Figure 2 As shown in FIG. 5( b ), in the afternoon, the current limiting in the curved solar panel 10 is very serious.

[0061] like Figure 3 As shown in Table 1, under the same conditions, the power generation of curved solar panels and flat solar panels is the largest in the morning and afternoon, and the power generation difference is the smallest at noon. The relationship between the power generation of flat solar panels and time is basically linear, while the power of curved solar panels varies greatly in each time period due to the relationship between the installation angle and the sun angle.

[0062] Table 1

[0063]

[0064] In this regard, an embodiment of the present application provides a curved solar panel system to improve the problem of low overall power generation efficiency due to current mismatch caused by the installation orientation or the structure of the curved solar panel.

[0065] like Figure 4 As shown, the curved solar panel system 100 includes a plurality of power generation units 110 ( Figure 4 Two are shown schematically in the figure). Each power generation unit 110 includes a curved solar panel 10 and a voltage and current regulating module 20. The voltage and current regulating module 20 is connected in series with the curved solar panel 10. Specifically, the curved solar panel 10 includes a positive output terminal 131 and a negative output terminal 132. The voltage and current regulating module 20 includes a negative input terminal 241, a positive input terminal 242, a negative output terminal 243 and a positive output terminal 244. In each power generation unit 110, the positive output terminal 131 and the negative output terminal 132 of the curved solar panel 10 are electrically connected to the negative input terminal 241 and the positive input terminal 242 of the voltage and current regulating module 20, respectively. Different power generation units 110 are connected in series. That is, the negative output terminal 243 of each voltage and current regulating module 20 is electrically connected to the positive output terminal 244 of another voltage and current regulating module 20.

[0066] Understandably, the curved solar panel system 100 also includes an inverter (not shown). Multiple power generation units 110 are connected in series between the positive and negative poles of the inverter. The inverter is used to convert the direct current from the multiple power generation units 110 into alternating current that is fed into the load and / or the power grid. The voltage and current regulating module 20 can be used to track the maximum power point of the curved solar panel 10 and adjust the output voltage of the curved solar panel 10, thereby optimizing the output power of the curved solar panel 10.

[0067] like Figure 5 As shown, the voltage and current regulating module 20 includes a main body 21, a clamping portion 22 connected to the main body 21, and a cable 23 connected to the main body 21. Specifically, the main body 21 includes a circuit (not shown) and a housing for accommodating the circuit. The circuit is used to be electrically connected to the curved solar panel 10. The appearance surface of the main body 21 includes a top surface 211, a bottom surface 212 opposite to the top surface 211, a first end surface 213 connecting the top surface 211 and the bottom surface 212, and a second end surface 214 connecting the top surface 211 and the bottom surface 212 and opposite to the first end surface 213. Two clamping portions 22 and four cables 23 are respectively connected to the first end surface 213 of the main body 21. Each clamping portion 22 is formed with a clamping slot 22s for clamping with a curved solar panel 10. Multiple cables 23 are used to be electrically connected to the curved solar panel 10 and the voltage and current regulating module 20 of other power generation units 110.

[0068] Understandably, Figure 4 The negative input terminal 241, the positive input terminal 242, the negative output terminal 243 and the positive output terminal 244 of the medium voltage and current regulating module 20 can be respectively connected to the ends of a cable 23 as a connection interface of the voltage and current regulating module 20. Since the cable 23 is flexible, the way in which the cable 23 electrically connects the voltage and current regulating module 20 and the curved solar panel 10 is more flexible and convenient.

[0069] like Figure 6 As shown, the curved solar panel 10 includes a plurality of crests 10p and a plurality of troughs 10r, and each crest 10p is alternately connected to a trough 10r in sequence, so that the curved solar panel 10 is wavy as a whole. Among them, the crests 10p and the troughs 10r are both arc-shaped. Specifically, the curved solar panel 10 includes a light-receiving surface 10a for receiving sunlight and a backlight surface 10b arranged opposite to the light-receiving surface 10a. When the voltage and current regulating module 20 is assembled with the curved solar panel 10, the voltage and current regulating module 20 is clamped to the crest 10p of the curved solar panel 10, and the main body 21 is accommodated on the side where the backlight surface 10b of the crest 10p is located. Therefore, in order to avoid damaging the curved solar panel 10 due to the incompatibility of the shapes of the voltage and current regulating module 20 and the curved solar panel 10 when the two are assembled, please refer to Figure 5 , the top surface 211 of the main body 21 is adapted to the shape of the backlight surface 10b of the peak portion 10p. Specifically, the top surface 211 of the main body 21 includes a plane 21a located in the middle area and a first inclined surface 21b and a second inclined surface 21c connected to opposite sides of the plane 21a. The first inclined surface 21b and the second inclined surface 21c are both inclined relative to the plane 21a toward the bottom surface 212, so that the top surface 211 is in an inverted arc shape as a whole.

[0070] like Figure 7 As shown, the clamping portion 22 is clamped on the peak portion 10p, and the main body 21 is located on the side of the peak portion 21p where the backlight surface 10b is located, so that the sun can be prevented from directly irradiating the main body 21 and causing damage. In addition, this can also prevent the main body 21 from blocking the curved solar panel 10 and affecting the curved solar panel 10 from receiving light.

[0071] Please refer to Figure 5 , Figure 6 and Figure 7 The opening of the card slot 22s faces the side where the main body 21 is located, and the size of the card slot 22s is adapted to the thickness of the crest portion 10p so as to be engaged with the crest portion 10p. Specifically, the card slot 22s includes a top wall 22a and a bottom wall 22b opposite to the top wall 22a. After the clamping portion 22 is engaged with the crest portion 10p, the top wall 22a contacts the light-receiving surface 10a of the crest portion 10p.

[0072] Furthermore, to avoid force concentration on the curved solar panel 10 after the voltage and current regulating module 20 is connected to the curved solar panel 10 , the voltage and current regulating module 20 includes a plurality of clamping portions 22 , and the plurality of clamping portions 22 are evenly spaced apart on the first end surface 213 . Figure 5 In the illustrated embodiment, two clamping parts 22 are illustrated, one of the two clamping parts 22 is arranged corresponding to the first inclined surface 21b, and the other is arranged corresponding to the second inclined surface 22c. For the convenience of description, the clamping part 22 corresponding to the first inclined surface 21b is defined as the first clamping part 221, and the clamping part 22 corresponding to the second inclined surface 21c is defined as the second clamping part 222. The first clamping part 221 and the second clamping part 222 are symmetrically distributed on opposite sides of the plurality of cables 23, so that the curved solar panel 10 is subjected to equal forces at the corresponding two clamping parts 22.

[0073] In some embodiments, the bottom wall 22b of each clamping portion 22 is connected to the top surface 211 of the main body 21 to enhance the strength of the connection between the clamping portion 22 and the main body 21. Furthermore, the bottom wall 22b of the first clamping portion 221 is connected to the first inclined surface 21b and is flush with the first inclined surface 21b, and the bottom wall 22b of the second clamping portion 222 is connected to the second inclined surface 21c and is flush with the second inclined surface 21c. In this way, it is convenient to smoothly clamp the curved solar panel 10 into the slot 22s without being blocked by the bottom wall 22b of the clamping portion 22. In other embodiments, the bottom wall 22b of the first clamping portion 221 may also be slightly lower than the first inclined surface 21b and / or the bottom wall 22b of the second clamping portion 222 may also be slightly lower than the first inclined surface 21b.

[0074] Furthermore, in order to facilitate the curved solar panel 10 to be clamped into the clamping slot 22s, the end of each clamping portion 22 at the opening of the clamping slot 22s is tilted away from the bottom wall 22b to form a guide slope 22c connected to the top wall 22a. The guide slope 22c is inclined relative to the top wall 22a toward a side away from the bottom wall 22b.

[0075] like Figure 8 As shown, in the curved solar panel system 100, a plurality of curved solar panels 10 are arranged in an array on the roof of a building. Each curved solar panel 10 is connected in series with a voltage and current regulating module 20. Fig. 9 and Fig.10 As shown, the voltage and current regulating module 20 is clamped on the backlight surface 10b of the crest portion 10p of the curved solar panel 10, and the cable 23 extends out of the curved solar panel 10 to be electrically connected to the voltage and current regulating module 20 corresponding to the next curved solar panel 10. The voltage and current regulating module 20 is located on the side of the curved solar panel 10 facing the room to avoid exposure to sunlight.

[0076] also, Figures 8 to 10 In the embodiment shown, the curved solar panel 10 and the voltage and current regulating module 20 in the curved solar panel system 100 are mounted on the same mounting surface. Fig.11 In the embodiment, the installation surface S1 and the installation surface S2 have the same installation orientation, and the installation surface S3 and the installation surface S4 have the same installation orientation. Therefore, the power generation unit 110 composed of the curved solar panel 10 and the voltage and current regulating module 20 can be installed on different installation surfaces with the same orientation, for example, multiple power generation units 110 are all connected in series on the installation surface S1 and the installation surface S2, or are all connected in series on the installation surface S3 and the installation surface S4.

[0077] In the embodiment of the present application, a voltage and current regulating module 20 is connected in series to each curved solar panel 10 to ensure that the voltage and current generated by each curved solar panel 10 are controlled by a corresponding voltage and current regulating module 20, and then the voltage and current of the curved solar panel 10 in each power generation unit 110 are adjusted by the voltage and current regulating module 20 to the next power generation unit 110. In this way, uniform adaptation is performed by identifying the current and voltage on the entire series circuit. When a curved solar panel 10 is blocked and the current is small, it can be known through P=V×I that: when ensuring the consistency of power P, the voltage and current regulating module 20 increases the current I of the curved solar panel 10 and reduces the voltage V of the curved solar panel 10, so that the current I is consistent with the current of other curved solar panels 10, so as not to cause the entire series circuit to limit the current and affect the power output of other curved solar panels 10 in the series circuit, and ensure the power maximization of the entire curved solar panel system 100. In some embodiments, the effective power generation power of the entire solar system can be increased by more than 20% relative to industrial-grade solar panels.

[0078] It should be noted that Figures 1 to 3 As can be seen from the description in Table 1, the sun angle has little effect on the power of the flat solar panel 10', while the solar system composed of the curved solar panel 10 has a more serious current limiting problem caused by the change of the sun angle, and the power in each time period varies greatly.

[0079] In some embodiments, the acquisition rate of each voltage and current regulating module 20 is less than 1 KiloSamples per Second (KSPS), that is, the conversion rate of each voltage and current regulating module 20 is less than 1000 points per second, so as to ensure that the voltage and current are effectively adjusted in real time according to the change of the sun angle, so as to maximize the current in the entire series circuit. It should be noted that in the solar energy system composed of the planar solar panels 10', even if the voltage and current regulating module is provided, the acquisition rate of the voltage and current regulating module is usually set between 10KSPS and 1MSPS. In addition, in order to save power consumption, the acquisition rate of the voltage and current regulating module will be reduced in the solar energy system composed of the planar solar panels 10', so that the acquisition rate of the voltage and current regulating module is as close to 10KSPS as possible within the range of 10KSPS to 1MSPS. The reason is that in the solar energy system composed of the planar solar panels 10', the number of planar solar panels 10' connected in series is too large, and a large acquisition rate is required. In the embodiment of the present application, the application scenario of the solar energy system composed of the curved solar panels 10 is a roof. The number of curved solar panels 10 connected in series is small, the number of collection points is small, and such a high collection rate is not required. Therefore, in order to save power consumption and increase the life of the voltage and current regulation module 20, the collection rate of the voltage and current regulation module 20 can be appropriately reduced.

[0080] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A curved solar panel system, characterized in that: It comprises a plurality of power generation units connected in series, each of the power generation units comprises a curved solar panel and a voltage and current regulating module connected in series with the curved solar panel, the curved solar panel comprises a crest portion, the crest portion comprises a light-receiving surface and a backlight surface opposite to each other, the voltage and current regulating module comprises a main body portion having a circuit and a clamping portion connected to the main body portion, the clamping portion is clamped on the crest portion, and the main body portion is located on the side of the crest portion where the backlight surface is located.

2. The curved solar panel system according to claim 1, wherein: The main body includes a top surface adapted to the backlight surface and a bottom surface opposite to the top surface, the top surface includes a plane and a first inclined surface and a second inclined surface respectively connected to opposite sides of the plane, the first inclined surface and the second inclined surface are respectively inclined relative to the plane toward the bottom surface.

3. The curved solar panel system according to claim 2, wherein: The clamping portion comprises a clamping slot clamped with the crest portion, and an opening of the clamping slot faces the side where the main body portion is located.

4. The curved solar panel system according to claim 3, wherein: The card slot includes a top wall in contact with the light receiving surface and a bottom wall opposite to the top wall, wherein the bottom wall is connected to the top surface.

5. The curved solar panel system according to claim 4, wherein: The clamping portion further includes a guiding inclined surface connected to the top wall, and the guiding inclined surface is inclined relative to the top wall toward a side away from the bottom wall.

6. The curved solar panel system according to claim 4, wherein: The clamping portion includes a first clamping portion and a second clamping portion that are spaced apart. The bottom wall of the first clamping portion is connected to the first inclined surface and flush with the first inclined surface. The bottom wall of the second clamping portion is connected to the second inclined surface and flush with the second inclined surface.

7. The curved solar panel system according to claim 1, wherein: The plurality of clamping portions are symmetrically distributed on the main body.

8. The curved solar panel system according to claim 1, wherein: The voltage and current regulating module further includes a plurality of cables electrically connected to the circuit and located at one end of the main body connected to the clamping portion.

9. The curved solar panel system according to claim 1, wherein: The curved solar panel also includes a trough portion connecting the crest portions.

10. The curved solar panel system according to any one of claims 1 to 9, characterized in that: The acquisition rate of the voltage and current regulation module is less than 1KSPS.

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