Photovoltaic tile assembly and circuit structure thereof

Abstract

The invention discloses a photovoltaic tile assembly and a circuit structure thereof, the photovoltaic tile assembly is in a wavy shape and comprises a plurality of periodic units, each periodic unit comprises a first curved surface part, a plane part and a second curved surface part, the first curved surface part and the second curved surface part are respectively located at two sides of the plane part, and the plane part is located at a wave crest in the periodic unit; the circuit structure is formed by connecting periodic circuits in a plurality of periodic units in series, the first curved surface part, the plane part and the second curved surface part correspond to a first line, a second line and a third line respectively, and the first line, the second line and the third line are connected in parallel to form the periodic circuit. When one of the first curved surface part or the second curved surface part cannot receive sunlight irradiation, the first curved surface part or the second curved surface part can only influence the current and voltage of the branch, and the influence on the overall output current and voltage is reduced. By adopting the circuit design in the scheme, the situation that the power generation effect of the whole component is not influenced when the local part cannot receive sunlight irradiation can be avoided, and continuous power generation can be carried out.

Description

Technical Field

[0001] The invention belongs to the field of photovoltaic technology, and in particular relates to a photovoltaic tile assembly and a circuit structure thereof. Background Art

[0002] At present, photovoltaic tiles are part of the building rather than added later. They are visually more beautiful and more hidden than traditional photovoltaic panels. Some solar tiles even completely imitate slate or ceramic tiles in appearance. Since the roof needs to meet the drainage and aesthetic effects, photovoltaic tiles need to be prepared into a regular wavy curved surface structure. However, the change of sun height in different seasons or the change of time of day will lead to different angles of sunlight, so that the cells on the curved surface cannot fully receive sunlight. The solar cells that are not exposed to sunlight do not generate electricity and are used as loads to consume the energy generated by other solar cells that are illuminated. In severe cases, it will cause local hot spots, causing local heating and even fire.

[0003] Based on the above problems, a photovoltaic tile assembly is needed, which can avoid the adverse effects of areas not exposed to sunlight on the entire assembly through circuit design of different areas of the photovoltaic tile assembly. Summary of the invention

[0004] In order to solve the technical problem in the background technology that the photovoltaic tiles are partially not exposed to sunlight and cause adverse effects on the overall circuit, the purpose of the present invention is mainly to provide a photovoltaic tile assembly and its circuit structure, which can solve the above problem.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a photovoltaic tile assembly and a circuit structure thereof, the photovoltaic tile assembly is wavy, including a plurality of periodic units, the periodic unit includes a first curved portion, a plane portion and a second curved portion, the first curved portion and the second curved portion are respectively located on both sides of the plane portion, and the plane portion is located at the crest of the wave in the periodic unit; the circuit structure is formed by periodic circuits in a plurality of periodic units connected in series, the first curved portion, the plane portion and the second curved portion respectively correspond to a first circuit, a second circuit and a third circuit, the first circuit, the second circuit and the third circuit are connected in parallel to form a periodic circuit.

[0006] In the circuit structure of the present solution, when the change in the angle of illumination causes the power generation efficiency of the first curved surface or the second curved surface to decrease or fail to generate electricity normally, only one of the two circuits is greatly affected, and the impact on the overall power generation efficiency is relatively low. That is, if the first circuit is not exposed to sunlight or a hot spot effect occurs, the second circuit and the third circuit can generate electricity normally, so that the photovoltaic tile assembly as a whole is still in a state of generating electricity. Compared with the existing series connection of all battery cells, when one of the first curved surface or the second curved surface cannot receive sunlight, it can only affect the current and voltage of the branch where it is located, reducing the impact on the overall output current and voltage. The circuit design in the present solution can avoid the situation where the local part cannot receive sunlight without affecting the power generation function of the overall component, and can continuously generate electricity.

[0007] Furthermore, the first curved surface portion and the second curved surface portion respectively include a first part, a second part and a third part from bottom to top, and the circuits corresponding to the first part and the third part are connected in series and in parallel with the circuit corresponding to the second part to form a first circuit and a third circuit. That is to say, the first part, the second part and the third part are specifically separated along the width direction of the photovoltaic tile assembly, so from the cross-section in the length direction of the photovoltaic tile assembly, the first part, the second part and the third part are arranged from bottom to top, that is, from the trough to the peak. Since the amount of sunlight received by the first part and the third part under large-angle irradiation is less than the amount of sunlight received per unit area by the second part, in order to increase the output power, the first part and the third part are connected in parallel and then connected in series with the second part, so that even if the first part or the third part cannot generate electricity normally, it can only affect the current and voltage of the branch where it is located, reducing the impact on the overall output current and voltage.

[0008] Furthermore, the first part and the third part are each connected in series with at least one sub-battery, the second part is connected in series or in parallel with at least one battery pack, and the battery pack contains at least sub-batteries connected in series or in parallel. According to the demand for output voltage and current, it can be achieved by changing the number of sub-batteries connected in series with the first part and the third part, and the voltage and current of the second part can be changed by adjusting the number of sub-battery slices and the connection method. Similarly, if the first part or the third part cannot receive sunlight, it only consumes the electrical energy generated by the sub-batteries connected in series with it, and the same is true for the second part, thereby improving the overall power generation efficiency and service life.

[0009] Furthermore, at least one battery pack is connected in series or in parallel in the second circuit, and the battery pack at least includes sub-batteries connected in series or in parallel. The voltage and current of the planar portion can be changed by adjusting the number and connection mode of the sub-battery sheets, and the total output voltage and current of the periodic battery pack after parallel connection meet the requirements of the application scenario.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] (1) The photovoltaic tile assembly includes a first circuit, a second circuit and a third circuit corresponding to the first curved portion, the flat portion and the second curved portion, which are connected in parallel to form a single periodic circuit. Then, the circuit of the entire photovoltaic tile assembly is composed of several periodic circuits in series. Even if a certain periodic unit is partially unable to receive sunlight, the impact on the overall output current and voltage is reduced.

[0012] (2) The above circuit structure design can also achieve that if one of the first curved surface or the second curved surface cannot receive sunlight, it can only affect the current and voltage of the branch where it is located, thereby reducing the impact on the overall output current and voltage;

[0013] (3) A single curved portion is further divided into a first portion, a second portion, and a third portion, and the circuits corresponding to the first portion and the third portion are connected in series and then in parallel with the circuit corresponding to the second portion. Since the amount of sunlight received by the first portion and the third portion under large-angle illumination is less than the amount of sunlight received per unit area by the second portion, such a design can ensure the overall power generation, and when the first portion or the third portion cannot generate electricity normally, it can only affect the current and voltage of the branch where it is located, thereby reducing the impact on the overall output current and voltage;

[0014] (4) The first part and the third part are each connected in series with at least one sub-battery, and the second part is connected in series or in parallel with at least one battery group. When the second part cannot receive sunlight, it only consumes the electrical energy generated by the sub-batteries connected in series with it, thereby improving the overall power generation efficiency and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0016] Figure 1 This is a schematic diagram of the appearance of the photovoltaic tile assembly in the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the photovoltaic tile assembly in the present invention;

[0018] Figure 3 It is a schematic diagram of the circuit structure of the periodic unit in the photovoltaic tile assembly of the present invention;

[0019] Figure 4 It is a schematic structural diagram corresponding to the three parts in the periodic unit of the present invention.

[0020] Explanation of reference numerals: 1 photovoltaic tile assembly; 2 periodic unit; 3 first curved portion; 4 plane portion; 5 second curved portion; 6 first line; 7 second line; 8 third line; 9 first part; 10 second part; 11 third part; DETAILED DESCRIPTION

[0021] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0022] Example:

[0023] like Figure 1-Figure 3 As shown, this embodiment provides a photovoltaic tile assembly and its circuit structure. The photovoltaic tile assembly 1 is wavy and includes several periodic units 2. The periodic unit 2 includes a first curved portion 3, a plane portion 4 and a second curved portion 5. The first curved portion 3 and the second curved portion 5 are respectively located on both sides of the plane portion 4, and the plane portion 4 is located at the peak of the wave in the periodic unit 2; the circuit structure is formed by the periodic circuits in several periodic units 2 connected in series, and the first curved portion 3, the plane portion 4 and the second curved portion 5 correspond to the first circuit 6, the second circuit 7 and the third circuit 8 respectively. The first circuit 6, the second circuit 7 and the third circuit 8 are connected in parallel to form a periodic circuit. In the circuit structure of this scheme, when the illumination angle changes and causes the power generation efficiency of the first curved portion 3 or the second curved portion 5 to decrease or fail to generate electricity normally, only one of the two circuits is greatly affected, and the overall power generation efficiency is less affected. That is, if the first circuit 6 is not exposed to sunlight or a hot spot effect occurs, the second circuit 7 and the third circuit 8 can generate electricity normally, so that the photovoltaic tile assembly 1 as a whole is still in a state of power generation. Compared with the existing method of connecting all the solar cells in series, when one of the first curved surface 3 or the second curved surface 5 cannot receive sunlight, it can only affect the current and voltage of the branch where it is located, reducing the impact on the overall output current and voltage. The circuit design in this solution can avoid the situation where the local part cannot receive sunlight without affecting the power generation function of the entire component, and can continuously generate electricity.

[0024] Preferably, at least one battery pack is connected in series or in parallel in the second circuit 7, and the battery pack at least includes sub-batteries connected in series or in parallel. The voltage and current of the planar portion 4 can be changed by adjusting the number and connection mode of the sub-battery sheets, and the total output voltage and current of the periodic battery pack after parallel connection meet the requirements of the application scenario.

[0025] like Figure 4As shown, the first curved surface portion 3 and the second curved surface portion 5 respectively include the first part 9, the second part 10 and the third part 11 from bottom to top, and the circuits corresponding to the first part 9 and the third part 11 are connected in series and in parallel with the circuit corresponding to the second part 10 to form the first circuit 6 and the third circuit 8. That is to say, the first part 9, the second part 10 and the third part 11 are specifically separated along the width direction of the photovoltaic tile assembly 1, so in the cross section of the length direction of the photovoltaic tile assembly 1, the first part 9, the second part 10 and the third part 11 are arranged from bottom to top, that is, from the trough to the peak. Since the amount of sunlight received by the first part 9 and the third part 11 under large angle irradiation is less than the amount of sunlight received per unit area by the second part, in order to increase the output power, the first part 9 and the third part 11 are connected in parallel and then connected in series with the second part 10, so that even if the first part or the third part cannot generate electricity normally, it can only affect the current and voltage of the branch where it is located, reducing the impact on the overall output current and voltage, and the overall power generation of the first curved surface portion 3 or the second curved surface portion 5 is not affected while ensuring a larger power generation.

[0026] Preferably, the first part 9 and the third part 11 are respectively connected in series with at least one sub-battery, and the second part 10 is connected in series or in parallel with at least one battery pack, and the battery pack at least includes sub-batteries connected in series or in parallel. According to the demand for output voltage and current, it can be achieved by changing the number of sub-batteries connected in series with the first part 9 and the third part 11, and the second voltage and current can be changed by adjusting the number of sub-batteries and the connection method. Similarly, if the first part 9 or the third part 11 cannot receive sunlight, it only consumes the electrical energy generated by the sub-batteries connected in series with it, and the same is true for the second part 10, thereby improving the overall power generation efficiency and service life.

[0027] Working principle: In this scheme, the first circuit 6, the second circuit 7 and the third circuit 8 corresponding to the first curved surface 3, the flat surface 4 and the second curved surface 5 in several periodic units 2 of the photovoltaic tile are connected in parallel to form a periodic circuit, and then the periodic circuits in several periodic units 2 are connected in series. When the light angle changes and the power generation efficiency of the first curved surface 3 or the second curved surface 5 is reduced or it cannot generate power normally, only one of the two circuits is greatly affected, and the impact on the overall power generation efficiency is relatively low. The first curved surface 3 and the second curved surface 5 respectively include a first part 9, a second part 10 and a third part 11 from bottom to top. The circuits corresponding to the first part 9 and the third part 11 are connected in series and then connected in parallel with the circuit corresponding to the second part 10 to form the first circuit 6 and the third circuit 8. The first part 9 and the third part 11 are connected in parallel and then connected in series with the second part 10. In this way, even if the first part or the third part cannot generate power normally, it can only affect the current and voltage of the branch where it is located, reducing the impact on the output current and voltage of the overall power generation of the first curved surface 3 or the second curved surface 5.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0029] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A photovoltaic tile assembly and a circuit structure thereof, characterized in that: The photovoltaic tile assembly (1) is in a wave-like shape and comprises a plurality of periodic units (2). The periodic unit (2) comprises a first curved portion (3), a plane portion (4) and a second curved portion (5). The first curved portion (3) and the second curved portion (5) are respectively located on both sides of the plane portion (4), and the plane portion (4) is located at a wave crest in the periodic unit (2). The circuit structure is formed by connecting the periodic circuits in the plurality of periodic units (2) in series. The first curved portion (3), the plane portion (4) and the second curved portion (5) respectively correspond to a first circuit (6), a second circuit (7) and a third circuit (8). The first circuit (6), the second circuit (7) and the third circuit (8) are connected in parallel to form a periodic circuit.

2. A photovoltaic tile assembly and circuit structure thereof according to claim 1, characterized in that: The first curved surface portion (3) and the second curved surface portion (5) respectively comprise, from bottom to top, a first portion (9), a second portion (10) and a third portion (11); the circuits corresponding to the first portion (9) and the third portion (11) are connected in series and in parallel with the circuit corresponding to the second portion (10) to form a first circuit (6) and a third circuit (8).

3. A photovoltaic tile assembly and circuit structure thereof according to claim 2, characterized in that: The first part (9) and the third part (11) are each connected in series with at least one sub-battery, and the second part (10) is connected in series or in parallel with at least one battery pack, wherein the battery pack at least includes sub-batteries connected in series or in parallel.

4. A photovoltaic tile assembly and circuit structure thereof according to claim 1, characterized in that: At least one battery pack is connected in series or in parallel in the second circuit (7), and the battery pack at least includes sub-batteries connected in series or in parallel.

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