Photovoltaic cell module

Abstract

The utility model discloses a photovoltaic cell assembly, which comprises a first cell assembly, a second cell assembly and a connecting structure which are respectively and independently packaged, the first cell assembly and the second cell assembly are fixed together through the connecting structure, and the connecting structure is detachably connected with the first cell assembly and the second cell assembly. The first cell assembly is a perovskite cell assembly, the band gap of the cell is adjustable, the light transmission is excellent, the manufactured wide-band-gap cell assembly absorbs high-energy photons, the second cell assembly is a crystalline silicon / amorphous silicon solar cell assembly, the band gap of the cell is narrow, the cell is arranged on the backlight side of the first cell assembly, and photon energy penetrating through the first cell assembly can be continuously absorbed. By means of the arrangement, light absorption can be fully utilized, effect complementation is achieved, the overall performance is improved, current matching is not needed while the occupied space is saved, the technical difficulty and cost are reduced, the second battery assembly can be independently used or the first battery assembly can be independently replaced, and economic losses are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cells, in particular to a photovoltaic cell assembly. Background Art

[0002] As the third-generation photovoltaic cell technology, perovskite cells have a strong conversion efficiency advantage over crystalline silicon and thin-film cells due to their material properties. Moreover, by adjusting the precursor components, the perovskite band gap is adjustable and the light transmittance is excellent. Perovskite-crystalline silicon stacked cells can be prepared, thus achieving a leap in conversion efficiency.

[0003] At present, although the conversion efficiency of perovskite-crystalline silicon tandem solar cells is very high, the long-term stability of the perovskite active layer is one of the problems that hinder the commercialization of perovskite / silicon tandem solar cells. At present, improving the stability of perovskite devices is usually based on packaging technology, crystal control engineering, defect passivation methods and band regulation methods.

[0004] However, similar to "stress corrosion" in many metal, glass and polymer materials, at the microscopic level, this stress can weaken lead halide orbital coupling, thereby changing structure-related material properties (such as band gap and carrier dynamics), reducing the barriers to phase change, defect formation and ion migration; at the macroscopic level, this stress will promote the generation of cracks and delamination, thereby accelerating the degradation of perovskite, resulting in reduced efficiency or even failure of the device. Therefore, for the current industry production of perovskite-crystalline silicon stacked components, once the component fails, it cannot be repaired and can only be replaced, which will cause huge economic losses. Utility Model Content

[0005] The main purpose of the utility model is to provide a photovoltaic cell assembly, which aims to solve the problem that once the assembly fails, it cannot be repaired and can only be replaced, which will cause huge economic losses.

[0006] To achieve the above-mentioned purpose, the utility model provides a photovoltaic cell assembly, comprising:

[0007] A first battery component, wherein the first battery component is light-transmissive and configured to absorb high-energy photons, and the first battery component comprises a perovskite battery component;

[0008] a second cell assembly, arranged on the backlight side of the first cell assembly and mechanically connected to the first cell assembly, the second cell assembly being used to absorb photon energy passing through the first cell assembly; the second cell assembly comprises a crystalline silicon cell assembly or an amorphous silicon cell assembly; and,

[0009] A connecting structure, wherein the connecting structure can detachably connect the first battery assembly and the second battery assembly;

[0010] Wherein, the first battery assembly and the second battery assembly are both independently packaged.

[0011] Optionally, the band gap of the second battery assembly cell is smaller than the band gap of the first battery assembly cell.

[0012] Optionally, the second battery assembly includes a plurality of second batteries connected in series, each of the second batteries having a second top electrode and a second bottom electrode disposed at both ends in an upper and lower direction, and among the second top electrode and the second bottom electrode, at least the second top electrode includes a transparent electrode.

[0013] Optionally, the first battery assembly includes a plurality of first batteries connected in series, each of the first batteries has a first top electrode and a first bottom electrode respectively disposed at two ends in an upper and lower direction, and the first top electrode and the first bottom electrode both include transparent electrodes.

[0014] In the technical solution provided by the utility model, the first battery assembly and the second battery assembly are separately packaged, and can work independently of each other, or can be mechanically connected together through the connection structure. When the first battery assembly and the second battery assembly are mechanically connected together through the connection structure, in the process of the photovoltaic cell assembly absorbing sunlight to generate electricity, the sunlight first irradiates the first battery assembly, and the first battery assembly can absorb high-energy photons in the sunlight, and allow the remaining photons in the sunlight to pass through the first battery assembly and irradiate the second battery assembly. At this time, the second battery assembly can continue to absorb the photon energy passing through the first battery assembly. In this way, the absorption of light is fully utilized to achieve complementary effects and improve the overall performance. While saving space, current matching is not required, and technical difficulty and cost are reduced to improve the photoelectric conversion efficiency of the photovoltaic cell assembly. When the efficiency of the first battery assembly is reduced or fails, the connection between the second battery assembly and the first battery assembly by the connection structure can be released, so that the first battery assembly can be removed from the upper end of the second battery assembly, and the second battery assembly can be used independently or the first battery assembly can be replaced, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of an embodiment of a photovoltaic cell assembly provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic structural diagram of a first battery in a first battery assembly;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of a first battery in a second battery assembly.

[0019] Description of Figure Numbers:

[0020] Label name Label name 100 Photovoltaic cell modules 2 Second battery pack 1 First battery pack 21 The second top electrode 11 The first top electrode 22 The second bottom electrode 12 The first bottom electrode 3 Connection structure

[0021] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] At present, although the conversion rate of perovskite-crystalline silicon tandem solar cells is very high, the long-term stability of the perovskite active layer is one of the problems that hinder the commercialization of perovskite / silicon tandem solar cells. At present, improving the stability of perovskite devices is usually based on packaging technology, crystal control engineering, defect passivation methods and band regulation methods.

[0026] However, similar to "stress corrosion" in many metal, glass and polymer materials, at the microscopic level, this stress can weaken lead halide orbital coupling, thereby changing structure-related material properties (such as band gap and carrier dynamics), reducing the barriers to phase change, defect formation and ion migration; at the macroscopic level, this stress will promote the generation of cracks and delamination, thereby accelerating the degradation of perovskite, resulting in reduced efficiency or even failure of the device. Therefore, for the current industry production of perovskite-crystalline silicon stacked components, once the component fails, it cannot be repaired and can only be replaced, which will cause huge economic losses.

[0027] In order to solve the above problems, the utility model provides a photovoltaic cell assembly 100. Figure 1 This is a specific embodiment of the photovoltaic cell assembly provided by the utility model.

[0028] See also Figures 1 to 3 The photovoltaic cell assembly 100 includes a first cell assembly 1, a second cell assembly 2 and a connection structure 3, wherein the first cell assembly 1 is light-transmissive and used to absorb high-energy photons, the first cell assembly 1 includes a perovskite cell assembly, the second cell assembly 2 is arranged on the backlight side of the first cell assembly 1, and is mechanically connected to the first cell assembly 1, the second cell assembly 2 is used to absorb the photon energy passing through the first cell assembly 1, the second cell assembly includes a crystalline silicon cell assembly, or an amorphous silicon cell assembly, the connection structure 3 can detachably connect the first cell assembly 1 and the second cell assembly 2, wherein the first cell assembly 1 and the second cell assembly 2 are independently packaged.

[0029] In the technical solution provided by the utility model, the first battery assembly 1 and the second battery assembly 2 are separately packaged, and can work independently of each other, or can be mechanically connected together through the connection structure 3. When the first battery assembly 1 and the second battery assembly 2 are mechanically connected together through the connection structure 3, in the process of the photovoltaic cell assembly 100 absorbing sunlight to generate electricity, the sunlight first irradiates the first battery assembly 1, and the first battery assembly 1 can absorb high-energy photons in the sunlight, and make the remaining photons in the sunlight pass through the first battery assembly 1 and irradiate the second battery assembly 2. At this time, the second battery assembly 2 can continue to absorb the high-energy photons from the first battery assembly 1. The photon energy passing through component 1 is fully utilized through the mechanical connection between the first battery component 1 and the second battery component 2 to achieve complementary effects and improve the overall performance. While saving space, it does not require current matching, and reduces technical difficulty and cost to improve the photoelectric conversion efficiency of the photovoltaic cell component 100. When the efficiency of the first battery component 1 decreases or fails, the connection between the second battery component 2 and the first battery component 1 by the connecting structure 3 can be released, so that the first battery component 1 can be removed from the upper end of the second battery component 2, so that the second battery component 2 can be used independently or the first battery component 1 can be replaced separately, thereby reducing economic losses.

[0030] It should be noted that the second cell assembly 2 and the first cell assembly 1 can both work independently, that is, when the second cell assembly 2 works independently, the photons in the sunlight will be absorbed by the second cell assembly 2 for photoelectric conversion; when the first cell assembly 1 works independently, the photons in the sunlight will be absorbed by the first cell assembly 1 for photoelectric conversion.

[0031] It is understandable that the present invention does not limit the specific forms of the second battery assembly 2 and the first battery assembly 1. It only needs to ensure that when sunlight is irradiated onto the first battery assembly 1, the first battery assembly 1 can absorb high-energy photons in the sunlight, and allow the remaining photons of the sunlight to pass through the first battery assembly 1 to irradiate the second battery assembly 2 and be absorbed by the second battery assembly.

[0032] In one embodiment of the present invention, the battery band gap of the second battery assembly 2 is smaller than the battery band gap of the first battery assembly 1 .

[0033] Specifically, the cells of the second battery assembly 2 have a small band gap, and the cells of the first battery assembly 1 have a large band gap. Such an arrangement enables the first battery assembly to have high light transmittance to ensure that enough light can pass through the first battery assembly 1 and irradiate the second battery assembly 2 for absorption by the second battery assembly 2.

[0034] It should be noted that the present invention does not limit the specific range of the battery band gap of the second battery assembly 2 and the battery band gap of the first battery assembly 1. It only needs to ensure that the battery band gap of the second battery assembly 2 is smaller than the battery band gap of the first battery assembly 1. In actual settings, it can be selected according to needs.

[0035] In addition, since sunlight needs to pass through the first battery assembly 1 before it can irradiate the second battery assembly 2, in order to ensure that part of the sunlight can pass through the first battery assembly 1 smoothly and thus ensure the conversion efficiency of the second battery assembly 2, the electrodes of the first battery assembly 1 also need to have high light transmittance to prevent the electrodes of the first battery assembly 1 from blocking the sunlight, thereby reducing the amount of sunlight penetrating the first battery assembly 1 and affecting the conversion efficiency of the second battery assembly 2.

[0036] Specifically, in the embodiment of the utility model, the first battery assembly 1 includes a plurality of first batteries connected in series, each of the first batteries has a first top electrode 11 and a first bottom electrode 12 respectively arranged at both ends in the upper and lower directions, and the first top electrode 11 and the first bottom electrode 12 include transparent electrodes. Such an arrangement enables both the first top electrode 11 and the first bottom electrode 12 to have excellent light transmission performance, so that high-energy photons in sunlight can pass through the first top electrode 11 to irradiate the first battery assembly 1 and be absorbed by the first battery assembly 1, and the remaining photons in sunlight can pass through the first top electrode 11, the first battery assembly 1 and the first bottom electrode 12 in sequence, and irradiate the second battery assembly 2 and be absorbed by the second battery assembly 2, thereby improving the conversion efficiency of the photovoltaic battery assembly 100.

[0037] Furthermore, in another embodiment of the utility model, the second battery assembly 2 includes a plurality of second batteries connected in series, and each of the second batteries has a second top electrode 21 and a second bottom electrode 22 respectively arranged at both ends in the upper and lower directions. With such arrangement, when the remaining photons in the sunlight irradiate the second battery assembly 2, they need to first pass through the second top electrode 21 of the second battery assembly 2 before they can irradiate the second battery assembly 2 and be absorbed by the second battery assembly 2. Therefore, in order to further improve the conversion efficiency of the second battery assembly 2, at least the second top electrode 21 of the second battery assembly 2 also needs to have high light transmittance to prevent the second top electrode 21 from blocking the sunlight, thereby reducing the amount of sunlight irradiating the second battery assembly 2 and affecting the conversion efficiency of the second battery assembly 2.

[0038] It can be understood that in this embodiment, since high-energy photons in the sunlight are absorbed by the first cell assembly 1, and the remaining photons in the sunlight are absorbed by the second cell assembly 2, no other cell structure is set at the lower end of the second cell assembly 2. Therefore, the second bottom electrode 22 does not need to be set as a transparent electrode.

[0039] It should be noted that the present invention does not limit the specific form of the connecting structure 3. For example, in one embodiment of the present invention, the connecting structure 3 includes a plurality of connecting rods arranged at intervals, one end of each connecting rod can be detachably connected to the lower end of the first battery assembly 1, and the other end can be detachably connected to the upper end of the second battery assembly 2.

[0040] In another embodiment of the utility model, the connecting structure 3 can also be configured as connecting parts arranged on two opposite sides of the first battery assembly 1 and the second battery assembly 2, and one end of each connecting part can be detachably connected to one side end of the first battery assembly 1, and the other end can be detachably connected to one side end of the second battery assembly 2.

[0041] Of course, in other embodiments of the present invention, the connection structure may also be configured in other forms, which may be selected according to actual needs during actual configuration.

[0042] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A photovoltaic cell assembly, characterized in that: include: A first battery component, wherein the first battery component is light-transmissive and configured to absorb high-energy photons, and the first battery component comprises a perovskite battery component; A second cell assembly is disposed on the backlight side of the first cell assembly and is mechanically connected to the first cell assembly, and the second cell assembly is used to absorb photon energy passing through the first cell assembly; the second cell assembly includes a crystalline silicon cell assembly or an amorphous silicon cell assembly; as well as, A connecting structure, wherein the connecting structure can detachably connect the first battery assembly and the second battery assembly; Wherein, the first battery assembly and the second battery assembly are both independently packaged.

2. The photovoltaic cell assembly according to claim 1, characterized in that: The band gap of the second battery assembly cell is smaller than the band gap of the first battery assembly cell.

3. The photovoltaic cell assembly according to claim 1, characterized in that: The second battery assembly includes a plurality of second batteries connected in series, each of the second batteries having a second top electrode and a second bottom electrode disposed at both ends in an upper and lower direction, and among the second top electrode and the second bottom electrode, at least the second top electrode includes a transparent electrode.

4. The photovoltaic cell assembly according to claim 1, characterized in that: The first battery assembly includes a plurality of first batteries connected in series, each of the first batteries includes a first top electrode and a first bottom electrode respectively disposed at two ends in an upper and lower direction, and the first top electrode and the first bottom electrode both include transparent electrodes.

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