Perovskite battery assembly, battery assembly, photovoltaic assembly and photovoltaic power generation system

Abstract

The utility model discloses a perovskite cell assembly, a cell assembly, a photovoltaic assembly and a photovoltaic power generation system, and the perovskite cell assembly comprises a perovskite cell which comprises a conductive layer; and the first bus bar is arranged on the side surface of the perovskite battery, and the first bus bar is electrically connected with the conductive layer. According to the perovskite battery assembly, the position arrangement of the first bus bar is reasonable, and the photoelectric conversion efficiency and the use performance of the perovskite battery assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a perovskite battery assembly, a battery assembly, a photovoltaic assembly and a photovoltaic power generation system. Background Art

[0002] The cell components of photovoltaic modules can convert sunlight into electrical energy. The circuits of the two cells in the four-terminal perovskite crystalline silicon stacked cell components are independent of each other, and there is great potential for commercial application. In related technologies, the connection between the busbar and the electrode will affect the photoelectric conversion efficiency of the cell, thereby affecting the efficiency of the cell component. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a perovskite battery assembly, in which the position of the first bus bar is reasonably arranged, thereby improving the photoelectric conversion efficiency and performance of the perovskite battery assembly.

[0004] The second object of the present utility model is to provide a battery assembly using the above-mentioned perovskite battery assembly.

[0005] The third object of the present utility model is to provide a photovoltaic assembly using the above-mentioned battery assembly.

[0006] The fourth objective of the present utility model is to provide a photovoltaic power generation system using the above photovoltaic assembly.

[0007] The perovskite battery assembly according to the embodiment of the first aspect of the utility model includes: a perovskite battery, the perovskite battery including a conductive layer; a first bus bar, the first bus bar is arranged on the side of the perovskite battery, and the first bus bar is electrically connected to the conductive layer.

[0008] According to the perovskite battery assembly of the utility model, the conductive layer has a conductive function, which can lead out the current of the perovskite battery, thereby facilitating the normal use of the perovskite battery. In addition, the current of the perovskite battery assembly is collected by the first bus bar, which helps to improve the performance of the perovskite battery assembly. Moreover, the first bus bar is arranged on the side of the perovskite battery, and the position of the first bus bar is reasonably arranged, which avoids the first bus bar blocking the light on the surface of the conductive layer, improves the photoelectric conversion efficiency of the conductive layer, and thus improves the use efficiency of the perovskite battery assembly. In addition, the structure is simple, which is convenient for the assembly of the perovskite battery assembly.

[0009] According to some embodiments of the utility model, the conductive layer includes: a first conductive layer portion, which is arranged on one side of the thickness direction of the perovskite cell; a second conductive layer portion, which is connected to the first conductive layer portion, and the second conductive layer portion is located on the side of the perovskite cell, and the first bus bar is connected to the second conductive layer portion.

[0010] According to some embodiments of the present invention, the first bus bar is connected to a surface of the second conductive layer portion on one side away from the center of the perovskite battery.

[0011] According to some embodiments of the present invention, the first conductive layer portion and the second conductive layer portion are an integrally formed part.

[0012] According to some embodiments of the utility model, the perovskite cell also includes a conductive glass piece, and the conductive glass piece and the conductive layer are respectively located on both sides of the thickness direction of the perovskite cell; the perovskite cell assembly further includes: a second bus bar, the second bus bar is arranged on the other side of the perovskite cell opposite to the first bus bar, and the second bus bar is electrically connected to the conductive glass piece.

[0013] According to some embodiments of the present invention, at least the side surface of the conductive glass piece corresponding to the side where the second bus bar is located extends beyond the corresponding side surface of the remaining part of the perovskite cell except the conductive glass piece, and the second bus bar is connected to the side surface of the conductive glass piece facing the first bus bar in the thickness direction.

[0014] The battery assembly according to the embodiment of the second aspect of the utility model includes: a perovskite battery assembly, which is the perovskite battery assembly according to the embodiment of the first aspect of the utility model; and a crystalline silicon battery assembly, which is arranged on one side of the perovskite battery assembly in the thickness direction.

[0015] According to some embodiments of the utility model, the battery assembly further includes: a sealing member, wherein the sealing member and the conductive glass member of the perovskite battery assembly jointly define a housing cavity, and the remaining portion of the perovskite battery assembly except the conductive glass member and the crystalline silicon battery assembly are located in the housing cavity.

[0016] According to some embodiments of the utility model, the sealing member includes: a first sealing portion, which is arranged on a side of the crystalline silicon cell assembly away from the perovskite cell assembly; a second sealing portion, one end of the second sealing portion is connected to the outer peripheral side of the first sealing portion, and the other end of the second sealing portion extends toward the conductive glass member, and the first sealing portion, the second sealing portion and the conductive glass member jointly define the accommodating cavity.

[0017] According to some embodiments of the present invention, the sealing member is a tempered glass member.

[0018] The photovoltaic assembly according to the embodiment of the third aspect of the utility model includes the battery assembly according to the embodiment of the second aspect of the utility model.

[0019] A photovoltaic power generation system according to an embodiment of the fourth aspect of the utility model includes a photovoltaic component according to an embodiment of the third aspect of the utility model.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a cross-sectional view of a perovskite battery assembly according to an embodiment of the utility model;

[0023] Figure 2 is a cross-sectional view of a battery assembly according to an embodiment of the utility model;

[0024] Figure 3 is a cross-sectional view of a battery assembly according to another embodiment of the utility model;

[0025] Figure 4 is a cross-sectional view of a crystalline silicon battery assembly according to an embodiment of the utility model;

[0026] Figure 5 is a top view of a crystalline silicon cell assembly according to an embodiment of the utility model, wherein the crystalline silicon cell assembly includes four crystalline silicon cell strings;

[0027] Figure 6 is a bottom view of a perovskite battery assembly according to an embodiment of the utility model, wherein the perovskite battery assembly includes four perovskite sub-batteries;

[0028] Figure 7 is a top view of a crystalline silicon cell assembly according to another embodiment of the utility model, wherein the crystalline silicon cell assembly includes eight crystalline silicon cell strings;

[0029] Figure 8 is a bottom view of a perovskite battery assembly according to another embodiment of the utility model, wherein the perovskite battery assembly includes eight perovskite sub-batteries;

[0030] Fig. 9is a top view of a crystalline silicon cell assembly according to another embodiment of the utility model, wherein the crystalline silicon cell assembly includes twelve crystalline silicon cell strings;

[0031] Fig.10 It is a bottom view of a perovskite cell assembly according to another embodiment of the utility model, wherein the perovskite cell assembly includes twelve perovskite sub-cells.

[0032] Reference numerals:

[0033] 100. Perovskite battery components;

[0034] 1. Perovskite battery; 11. Conductive layer; 111. First conductive layer portion; 112. Second conductive layer portion;

[0035] 12. Conductive glass parts; 13. Electron / hole transport layer;

[0036] 14. Perovskite absorption layer; 15. Hole / electron transport layer; 16. Perovskite subcell;

[0037] 2. First bus bar; 3. Second bus bar;

[0038] 200. Battery assembly;

[0039] 201, crystalline silicon battery module; 2011, crystalline silicon battery string; 2011a, crystalline silicon lower electrode;

[0040] 2011b, first indium tin oxide / silicon nitride layer; 2011c, first passivation layer; 2011d, P / N type silicon;

[0041] 2011e, second passivation layer; 2011f, second indium tin oxide / silicon nitride layer; 2011g, crystalline silicon upper electrode;

[0042] 2011h, first welding strip; 2011i, second welding strip;

[0043] 2011j, third bus; 2011k, ​​fourth bus;

[0044] 2012, Bus 7; 2013, Bus 8; 2014, Bus 9;

[0045] 202, sealing member; 2021, first sealing portion; 2022, second sealing portion;

[0046] 203, a receiving cavity; 204, an adhesive film. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1The perovskite battery assembly 100 according to the first embodiment of the utility model is described. The perovskite battery assembly 100 can be used in the battery assembly 200, but is not limited thereto. In the following description of the present application, the perovskite battery assembly 100 is described in detail by taking the battery assembly 200 as an example.

[0048] like Figure 1 As shown, the perovskite battery assembly 100 according to the first embodiment of the utility model includes a perovskite battery 1 and a first bus bar 2.

[0049] Specifically, the perovskite cell 1 includes a conductive layer 11, and the first bus bar 2 is disposed on the side of the perovskite cell 1, and the first bus bar 2 is electrically connected to the conductive layer 11. Figure 1 In the example, the conductive layer 11 is located on the lower side of the perovskite battery 1, and the first bus bar 2 is located on one side of the perovskite battery 1 along the front-to-back direction. In this way, the conductive layer 11 has a conductive function, and the conductive layer 11 can be set as the positive electrode or negative electrode of the perovskite battery 1 (specifically, it can be set according to the actual use situation), so that the conductive layer 11 is convenient for the current of the perovskite battery 1 to be drawn out, which is convenient for the normal use of the perovskite battery 1. In addition, through the electrical connection between the first bus bar 2 and the conductive layer 11, the current of the perovskite battery 1 can be drawn out, so as to facilitate the collection of the current of the perovskite battery assembly 100, thereby improving the performance of the perovskite battery assembly 100. Moreover, by setting the first bus bar 2 to be located on the side of the perovskite battery 1, compared with the first bus bar 2 being set on the one side surface in the thickness direction of the conductive layer 11, the first bus bar 2 will not block the light on the surface of the conductive layer 11, which can improve the photoelectric conversion efficiency of the conductive layer 11, thereby improving the use efficiency of the perovskite battery assembly 100. In addition, the structures of the conductive layer 11 and the first bus bar 2 are simple, thereby facilitating the assembly of the perovskite battery assembly 100 .

[0050] According to the perovskite battery assembly 100 of the utility model, the conductive layer 1 has a conductive function, and can lead out the current of the perovskite battery 1, thereby facilitating the normal use of the perovskite battery 1. In addition, the current of the perovskite battery assembly 100 is collected by the first bus bar 2, which helps to improve the performance of the perovskite battery assembly 100. Moreover, the first bus bar 2 is arranged on the side of the perovskite battery 1, and the position of the first bus bar 2 is reasonably arranged, so as to avoid the first bus bar 2 blocking the light on the surface of the conductive layer 11, improve the photoelectric conversion efficiency of the conductive layer 11, and thus improve the use efficiency of the perovskite battery assembly 100. In addition, the structure is simple, which is convenient for the assembly of the perovskite battery assembly 100.

[0051] According to some embodiments of the present invention, referring to Figure 1The conductive layer 11 includes a first conductive layer portion 111 and a second conductive layer portion 112. The first conductive layer portion 111 is arranged in the thickness direction of the perovskite cell 1 (eg Figure 1 On one side of the upper and lower directions shown in the figure, the second conductive layer portion 112 is connected to the first conductive layer portion 111, the second conductive layer portion 112 is located on the side of the perovskite battery 1, and the first bus bar 2 is connected to the second conductive layer portion 112.

[0052] For example, in Figure 1 In the example, the first conductive layer portion 111 is located on the lower side of the perovskite battery 1, the lower end of the second conductive layer portion 112 is connected to the rear end of the first conductive layer portion 111, and the cross-sectional shape of the conductive layer 11 is roughly "L"-shaped. The second conductive layer portion 112 is located on the rear side of the perovskite battery 1, and there is a gap between the second conductive portion 112 and the rear side of the perovskite battery 1. In this way, the structure of the conductive layer 11 is simple and easy to produce, thereby improving the production efficiency of the conductive layer 11. Moreover, the first conductive layer portion 111 and the second conductive layer portion 112 of the conductive layer 11 can protect the internal structure of the perovskite battery 1 from the lower side and the rear side of the perovskite battery 1, thereby avoiding damage to the interior of the perovskite battery 1, and further contributing to the normal use of the perovskite battery 1 for a long time. In addition, the provision of the second conductive layer portion 112 facilitates the connection between the first bus bar 2 and the conductive layer 11, thereby reducing the difficulty of connecting the first bus bar 2 and the conductive layer 11, thereby improving the installation efficiency of the perovskite component 100.

[0053] According to some embodiments of the present invention, referring to Figure 1 , the first bus bar 2 is connected to a surface of the second conductive layer portion 112 that is away from the center of the perovskite cell 1. Figure 1 In the example, the front side surface of the first bus bar 2 is connected to the rear side surface of the second conductive layer 11. In this way, the contact area between the conductive layer 11 and the first bus bar 2 is increased, so that the current can flow smoothly from the conductive layer 11 to the first bus bar 2, which is conducive to the connection between the perovskite battery assembly 100 and other components, and also improves the connection stability between the first bus bar 2 and the conductive layer 11, and also prolongs the service life of the perovskite battery 1. In addition, the positions of the first bus bar 2 and the second conductive layer portion 112 are reasonably arranged, thereby reducing the difficulty of assembling the perovskite battery assembly 100, thereby improving the assembly efficiency of the perovskite battery assembly 100.

[0054] According to some embodiments of the present invention, referring to Figure 1 , the first conductive layer portion 111 and the second conductive layer portion 112 are an integrally formed part. Thus, the overall connection stability of the first conductive layer portion 111 and the second conductive layer portion 112 is enhanced, thereby improving the structural strength of the conductive layer 11. Moreover, it is also beneficial to the production and processing of the conductive layer 11, as well as the assembly with other components of the perovskite cell 1.

[0055] According to some embodiments of the present invention, referring to Figure 1 The perovskite cell 1 further includes a conductive glass member 12. The conductive glass member 12 and the conductive layer 11 are respectively located in the thickness direction of the perovskite cell 1 (eg Figure 1 For example, in Figure 1 In the example, the conductive glass piece 12 is located on the upper side of the perovskite battery 1, and the conductive layer 11 is located on the lower side of the perovskite battery 1. The conductive glass piece 12 and the conductive layer 11 are the positive electrode and the negative electrode of the perovskite battery 1, respectively. The configuration of the conductive glass piece 12 and the conductive layer 11 includes the following situations: First, the conductive glass piece 12 is the positive electrode of the perovskite battery 1, and the conductive layer 11 is the negative electrode of the perovskite battery 1. Second, the conductive glass piece 12 is the negative electrode of the perovskite battery 1, and the conductive layer 11 is the positive electrode of the perovskite battery 1. Such a configuration facilitates the current of the perovskite battery 1 to be drawn out through the conductive glass piece 12 and the conductive layer 11, thereby facilitating the normal use of the perovskite battery 1. In addition, the current of the perovskite battery 1 is drawn out from the upper and lower ends, thereby avoiding a short circuit of the perovskite battery 1, thereby extending the service life of the battery assembly 200. It should be noted that the upper side surface of the second conductive layer portion 112 contacts the lower side surface of the conductive glass member 12 , but part of the surface of the conductive glass member 12 is conductive, so the contact position between the two is not conductive.

[0056] Reference Figure 1 The perovskite cell assembly 100 further includes a second bus bar 3, which is disposed on the other side of the perovskite cell 1 opposite to the first bus bar 2, and the second bus bar 3 is electrically connected to the conductive glass member 12. Figure 1 In the example, the second bus bar 3 is located on the front side of the perovskite battery 1, there is a gap between the second bus bar 3 and the perovskite battery 1, and the upper end of the second bus bar 3 is connected to the lower surface of the conductive glass 12. In this way, the current on the conductive glass member 12 can be led out through the second bus bar 3, so as to facilitate the current on the perovskite battery 1. When the perovskite battery assembly 100 is applied to the battery assembly 200, it is convenient for the perovskite battery assembly 100 to be connected in series or in parallel with other battery assemblies, thereby improving the performance of the perovskite battery assembly 100.

[0057] According to some embodiments of the present invention, referring to Figure 1 , at least the side surface of the conductive glass member 12 corresponding to the second bus bar 3 extends beyond the corresponding side surface of the rest of the perovskite cell 1 except the conductive glass member 12, and the second bus bar 3 is connected to the surface of the conductive glass member 12 facing the first bus bar 2 in the thickness direction (i.e., the up-down direction). Figure 1In the example, the arrangement of the conductive glass member 12 includes the following situations: First, the side surface of the front side of the conductive glass member 12 extends beyond the front side surface of the rest of the perovskite cell 1 except the conductive glass member 12. Second, the side surfaces of the front and rear sides of the conductive glass member 12 both extend beyond the front and rear side surfaces corresponding to the rest of the perovskite cell 1 except the conductive glass member 12. The upper side surface of the second bus bar 3 is connected to the lower side surface of the portion extending from the front side surface of the conductive glass member 12, and the second bus bar 3 and the conductive glass member 12 are electrically connected.

[0058] In this way, while ensuring the connection between the second bus bar 3 and the conductive glass member 12, the flatness of the upper surface of the conductive glass member 12 is improved, thereby helping to improve the photoelectric conversion capacity of the perovskite battery assembly 100 and improving the performance of the perovskite battery assembly 100. In addition, the second bus bar 3 also facilitates the extraction of the current of the perovskite battery 1, thereby facilitating the use of the perovskite battery assembly 100.

[0059] Optionally, refer to Figure 1 From the conductive layer 11 toward the conductive glass member 12, the perovskite cell 1 further includes an electron / hole transport layer 13, a perovskite absorption layer 14, and a hole / electron transport layer 15. For example, Figure 1 In the example, the perovskite cell 1 is arranged from bottom to top, and is sequentially a conductive layer 11, an electron / hole transport layer 13, a perovskite absorption layer 14, a hole / electron transport layer 15 and a conductive glass member 12. Thus, after being irradiated by sunlight, the perovskite absorption layer 14 generates electron-hole pairs from the absorbed photons, wherein the uncombined electrons and holes are respectively transmitted to the corresponding electron / hole transport layer 13 and the hole / electron transport layer 15, and then collected by the corresponding conductive layer 11 and the conductive glass member 12. Among them, the stacked arrangement of the perovskite cell 1 meets the existing conventional perovskite cell assembly production process.

[0060] According to the battery assembly 200 of the second embodiment of the utility model, refer to Figure 2 , including a perovskite battery component 100 and a crystalline silicon battery component 201.

[0061] Specifically, the perovskite battery assembly 100 is a perovskite battery assembly 100 according to the first embodiment of the utility model, and the crystalline silicon battery assembly 201 is arranged in the thickness direction of the perovskite battery assembly 100 (for example Figure 1 side of the up and down direction).

[0062] For example, in Figure 2In the example, the perovskite battery assembly 100 is located above the crystalline silicon battery assembly 201. With this arrangement, the perovskite battery assembly 100 and the crystalline silicon battery assembly 201 can be manufactured separately, thereby avoiding conflicts in production processes and the problem that the perovskite battery assembly 100 is not easy to deposit on the crystalline silicon battery assembly 201, thereby reducing the difficulty of preparation and facilitating improving the production efficiency of the battery assembly 200. In addition, the battery assembly 200 composed of the perovskite battery assembly 100 and the crystalline silicon battery assembly 201 can make full use of sunlight of different bands, thereby improving the photoelectric conversion capacity of the battery assembly 200, and thereby increasing the power generation of the photovoltaic assembly (not shown). In addition, the perovskite battery assembly 100 and the crystalline silicon battery assembly 201 can be connected in parallel or in series according to actual needs, and the mismatch problem can be avoided through system design, thereby improving the performance of the battery assembly 200. For example, the positive electrode of the perovskite battery assembly 100 is connected to the positive electrode of the crystalline silicon battery assembly 201, and the negative electrode of the perovskite battery assembly 100 is connected to the negative electrode of the crystalline silicon battery assembly 201 to achieve parallel connection. The connection between the perovskite battery assembly 100 and the crystalline silicon battery assembly 201 can be achieved through the first bus bar 1 and the second bus bar 3.

[0063] According to some embodiments of the present invention, referring to Figure 2 The battery assembly 200 further includes a sealing member 202. The sealing member 202 and the conductive glass member 12 of the perovskite battery assembly 100 jointly define a receiving cavity 203. The remaining portion of the perovskite battery assembly 100 except the conductive glass member 12 and the crystalline silicon battery assembly 201 are located in the receiving cavity 203. For example, in Figure 2 In the example, the seal 202 is located on the lower side of the crystalline silicon battery assembly 201, the upper side of the outer peripheral edge of the seal 202 contacts the outer peripheral edge of the lower side of the conductive glass member 12, and the upper surface of the middle part of the seal 202 is connected to the lower surface of the crystalline silicon battery assembly 201. Thus, the seal 202 wraps the rest of the battery assembly 200 except the conductive glass member 12, improves the sealing of the battery assembly 200, and effectively prevents foreign substances (such as dust, water vapor or impurities) from entering the interior of the battery assembly 200, thereby preventing the above-mentioned dust, water vapor or impurities from affecting the photoelectric conversion ability of the battery assembly 200, and is conducive to the normal use of the battery assembly 200 for a long time. In addition, the provision of the accommodating cavity 203 also facilitates the assembly of the seal 202 with the perovskite battery assembly 100 and the crystalline silicon battery assembly 201, thereby reducing the difficulty of assembling the battery assembly 200 and improving the assembly efficiency of the battery assembly 200.

[0064] According to some embodiments of the present invention, referring to Figure 2The sealing member 202 includes a first sealing portion 2021 and a second sealing portion 2022. The first sealing portion 2021 is disposed on a side of the crystalline silicon cell assembly 201 away from the perovskite cell assembly 100. One end of the second sealing portion 2022 is connected to the outer peripheral side of the first sealing portion 2021. The other end of the second sealing portion 2022 extends toward the conductive glass member 12. The first sealing portion 2021, the second sealing portion 2022 and the conductive glass member 12 jointly define a accommodating cavity 203.

[0065] For example, in Figure 2 In the example, the first sealing part 2021 is located at the lower side of the crystalline silicon battery assembly 201, the second sealing part 2022 extends in the up-down direction, the lower side of the second sealing part 2022 is connected to the outer peripheral edge of the upper side of the first sealing part 2021, and the upper side of the second sealing part 2022 is in contact with the lower side of the portion extending from the conductive glass member 12 (i.e., the left and right sides of the conductive glass member 12 extend beyond the rest of the perovskite battery 1), and the cross-sectional shape of the sealing member 202 is roughly "U"-shaped, and the second sealing part 2022 wraps the rest of the perovskite battery 1 except the conductive glass member 12 along the circumference of the perovskite battery 1. With such a configuration, the structure of the sealing member 202 is simple, which reduces the difficulty of producing the sealing member 202, thereby improving the production efficiency of the sealing member 202. In addition, it is also easy to form the accommodating cavity 203, thereby reducing the difficulty of assembling the battery assembly 200. Moreover, the second sealing portion 2022 extends toward the conductive glass member 12 and contacts the conductive glass member 12 , further improving the sealing of the perovskite battery assembly 100 , thereby further improving the sealing of the battery assembly 200 .

[0066] According to some embodiments of the present invention, the sealing member 202 is a tempered glass member. This configuration can improve the protective effect of the sealing member 202 on the crystalline silicon battery assembly 201 and the perovskite battery assembly 100, and extend the service life of the battery assembly 200. It should be noted that the tempered glass member is melted to form the first sealing portion 2021 and the second sealing portion 2022 structure, but is not limited thereto. For example, Figure 3 As shown, the first sealing part 2021 can be set as a tempered glass part, and the second sealing part 2022 can be set as a butyl rubber part. Butyl rubber has good airtightness and is heat-resistant, aging-resistant and chemical-resistant, thereby improving the second sealing part 2022 to prevent the above-mentioned dust, water vapor or impurities from invading, and improving the photoelectric conversion capability of the battery assembly 200. In addition, it helps to extend the service life of the second sealing part 2022, thereby extending the service life of the sealing member 202.

[0067] Optionally, refer to Figure 4The crystalline silicon cell assembly 201 includes a crystalline silicon cell string 2011, and the crystalline silicon cell string 2011 includes a crystalline silicon lower electrode 2011a, a first indium tin oxide / silicon nitride layer 2011b, a first passivation layer 2011c, a P / N type silicon layer 2011d, a second passivation layer 2011e, a second indium tin oxide / silicon nitride layer 2011f and a crystalline silicon upper electrode 2011g arranged in sequence from bottom to top. The arrangement of the crystalline silicon lower electrode 2011a and the crystalline silicon upper electrode 2011g includes the following situations: first, the crystalline silicon lower electrode 2011a is the positive electrode of the crystalline silicon cell string 2011, and the crystalline silicon upper electrode 2011g is the negative electrode of the crystalline silicon cell string 2011. Second, the crystalline silicon lower electrode 2011a is the negative electrode of the crystalline silicon cell string 2011, and the crystalline silicon upper electrode 2011g is the positive electrode of the crystalline silicon cell string 2011. When the crystalline silicon battery assembly 201 is irradiated by sunlight, light interacts with silicon to generate electron-hole pairs, and the generated electron-hole pairs are separated to the two poles by the potential barrier formed in the crystalline silicon, and the positive and negative charges are collected by the corresponding crystalline silicon upper electrode 2011g and crystalline silicon lower electrode 2011a respectively. With such a configuration, the photoelectric conversion rate of the crystalline silicon battery assembly 100 is high, thereby improving the photoelectric conversion capacity of the battery assembly 200. It should be noted that Figure 1 The perovskite battery component 100 is Figure 6 The perovskite battery component 100 is a cross-sectional view along the up-down direction and the front-back direction, and the cross-sectional position is a non-middle position of the perovskite battery component 100 along the left-right direction. Figure 4 The crystalline silicon battery component 201 is Figure 5 A cross-sectional view of the crystalline silicon cell string 2011 of the crystalline silicon cell assembly 201 along the up-down direction and the left-right direction.

[0068] Further optionally, referring to Figure 4 The crystalline silicon battery assembly string 2011 further includes a first welding strip 2011h, a second welding strip 2011i, a third bus bar 2011j and a fourth bus bar 2011k. The lower side of the first welding strip 2011h is connected to the upper side of the crystalline silicon upper electrode 2011g, the upper side of the second welding strip 2011i is connected to the lower side of the crystalline silicon lower electrode 2011a, the front side of the third bus bar 2011j is connected to the rear side of the first welding strip 2011h, and the rear side of the fourth bus bar 2011k is connected to the front side of the second welding strip 2011i. For example, referring to Figure 5 and Figure 6 , the third bus bar 2011j is electrically connected to the second bus bar 3, and the fourth bus bar 2011k is electrically connected to the first bus bar 2, so as to realize the parallel connection of the crystalline silicon battery assembly 201 and the perovskite battery assembly 100. The third bus bar 2011j is connected to the second bus bar 3 by welding, and the fourth bus bar 2011 is connected to the first bus bar 2 by welding.

[0069] In this way, the current on one electrode of the crystalline silicon battery module 201 (that is, the positive electrode or negative electrode of the crystalline silicon battery module 201) is led out through the first welding strip 2011h and the third bus bar 2011j, and the current on the other electrode of the crystalline silicon battery module 201 (that is, the negative electrode or positive electrode of the crystalline silicon battery module 201) is led out through the second welding strip 2011i and the fourth bus bar 2011k, ​​so as to facilitate the current of the crystalline silicon battery module 201 and facilitate the electrical connection of the crystalline silicon battery module 201 with other battery modules. In addition, it is also convenient for the electrical connection of the perovskite battery module 100 and the crystalline silicon battery module 201, so as to facilitate the normal use of the battery module 200.

[0070] According to some optional embodiments of the present invention, referring to Figure 2-Figure 4 The battery assembly 200 further includes a glue film 204, which is arranged between the crystalline silicon battery assembly 201 and the perovskite battery assembly 100, and is also arranged between the first welding strip 2011h and the second indium tin oxide / silicon nitride layer 2011f and wraps the crystalline silicon upper electrode 2011g, and between the second welding strip 2011i and the first indium tin oxide / silicon nitride layer 2011b and wraps the crystalline silicon lower electrode 2011a. The first sealing member 202 and the crystalline silicon battery assembly 201 are also bonded by the glue film 204, and the second sealing member 202 and the rest of the battery assembly 200 except the conductive glass member 12 are encapsulated and bonded by the glue film 204. In this arrangement, the various parts of the battery assembly 200 are bonded together by the glue film 204, which improves the stability of the battery assembly 200, thereby helping to extend the service life of the battery assembly 200. It should be noted that during the installation of the battery assembly 200, the adhesive film 204 is first applied, and then the perovskite battery assembly 100 and the crystalline silicon battery assembly 201 are connected in parallel. For example, the adhesive film 204 can be a TPO adhesive film, but is not limited thereto.

[0071] Optionally, refer to Figure 6 , Figure 8 and Fig.10 The perovskite battery 1 includes a plurality of perovskite sub-batteries 16, which are connected in series to form the perovskite battery 1, dividing the perovskite battery 1 into two left and right parts, wherein a portion of the plurality of perovskite sub-batteries 16 are arranged side by side in the left part of the perovskite battery assembly 100, and another portion of the plurality of perovskite sub-batteries 16 are arranged side by side in the right part of the perovskite battery 1, the number of the plurality of perovskite sub-batteries 16 in the above-mentioned portion is consistent with the number of the plurality of perovskite sub-batteries 16 in the above-mentioned other portion, and the two perovskite sub-batteries 16 along the left and right directions are opposite.

[0072] The perovskite battery assembly 100 further includes a fifth bus bar 4 and a sixth bus bar 5, wherein the fifth bus bar 4 is located at the rear end between the left and right parts of the perovskite battery assembly 100, and the sixth bus bar 5 is located at the front end between the left and right parts of the perovskite battery assembly 100. Among them, the first bus bar 2 is located on the rear side of the perovskite battery 1, and the second bus bar 3 is located on the front side of the perovskite battery 1. The rear end face of the fifth bus bar 4 is welded to the front side of the first bus bar 2, and the front end face of the sixth bus bar 5 is welded to the rear side of the second bus bar 3. When the fifth bus bar 4 is the negative electrode of the perovskite battery assembly 100 and the sixth bus bar 5 is the positive electrode of the perovskite battery assembly 100, the current flow path in the perovskite battery assembly 100 is as follows: Figure 6 As shown by arrow B in FIG. But it is not limited to this. For example, when the fifth bus bar 4 is the positive electrode of the perovskite battery assembly 100 and the sixth bus bar 5 is the negative electrode of the perovskite battery assembly 100, the current in the perovskite battery assembly 100 flows along Figure 6 Flow in the opposite direction of arrow B.

[0073] The different numbers of perovskite sub-cells 16 in the perovskite cell assembly 100 are described in detail. For example:

[0074] When the perovskite cell 1 includes four perovskite subcells 16, as Figure 6 As shown, two perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the right part of the perovskite battery 1, and another two perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the left part of the perovskite battery 1. The current flow path in the perovskite battery assembly 100 is as shown in FIG. Figure 6 As shown by arrow B in FIG.

[0075] When the perovskite cell 1 includes eight perovskite subcells 16, as Figure 8 As shown, four perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the right part of the perovskite battery 1, and another four perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the left part of the perovskite battery 1. The current flow path in the perovskite battery assembly 100 is as shown in FIG. Figure 8 As shown by arrow B in FIG.

[0076] When the perovskite cell 1 includes twelve perovskite subcells 16, as Fig.10 As shown, six perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the right part of the perovskite battery 1, and another six perovskite sub-cells 16 are arranged side by side in the front-to-back direction on the left part of the perovskite battery 1. The current flow path in the perovskite battery assembly 100 is as shown in FIG. Fig.10 As shown by arrow B in FIG.

[0077] Optionally, refer to Figure 5 , Figure 7 and Fig. 9The crystalline silicon battery assembly 201 includes a plurality of crystalline silicon battery strings 2011, each crystalline silicon battery string 2011 includes a positive bus bar (e.g., the third bus bar 2011j or the fourth bus bar 2011k) and a negative bus bar (e.g., the fourth bus bar 2011k or the third bus bar 2011j), and the plurality of crystalline silicon battery strings 2011 are connected in series to form the crystalline silicon battery assembly 201. In the plurality of crystalline silicon battery strings 2011, as Figure 5 As shown, two crystalline silicon battery strings 2011 opposite to each other in the left-right direction can use the same positive bus bar or negative bus bar. The crystalline silicon battery assembly 201 is divided into two left and right parts, wherein one part of the crystalline silicon battery strings 2011 is arranged side by side in the left part of the crystalline silicon battery assembly 201, and the other part of the crystalline silicon battery strings 2011 is arranged side by side in the right part of the crystalline silicon battery assembly 201. The number of the one part of the crystalline silicon battery strings 2011 is the same as the number of the other part of the crystalline silicon battery strings 2011, and the two crystalline silicon battery strings 2011 in the left-right direction are opposite to each other.

[0078] Reference Figure 5 , Figure 7 and Fig. 9 The crystalline silicon battery module 201 further includes at least one seventh bus bar 2012 and at least one eighth bus bar 2013, the seventh bus bar 2012 is located on the left side of the crystalline silicon battery module 201, the eighth bus bar 2013 is located on the right side of the crystalline silicon battery module 201, the third bus bar 2011j is located at the front end between the left and right parts of the crystalline silicon battery module 201, and the fourth bus bar 2011k is located at the rear end between the left and right parts of the crystalline silicon battery module 201. The left and right parts of the crystalline silicon battery module 201 jointly use the third bus bar 2011j as the positive electrode (or negative electrode) and the fourth bus bar 2011k as the negative electrode (or positive electrode), the above-mentioned part of the multiple crystalline silicon battery strings 2011 of the left part of the crystalline silicon battery module 201 are connected in series through the seventh bus bar 2012, and the above-mentioned other part of the multiple crystalline silicon battery strings 2011 of the right part of the crystalline silicon battery module 201 are connected in series through the eighth bus bar 2013.

[0079] The different numbers of crystalline silicon cell strings 2011 in the crystalline silicon cell assembly 201 are described in detail. For example:

[0080] When the crystalline silicon cell assembly 201 includes four crystalline silicon cell strings 2011, as shown in FIG. Figure 5 As shown, two crystalline silicon battery strings 2011 are located on the left part of the crystalline silicon battery assembly 201, and the other two crystalline silicon battery strings 2011 are located on the right part of the crystalline silicon battery assembly 201. The left sides of the above two crystalline silicon battery strings 2011 are electrically connected to the seventh bus bar 2012, and the right sides of the above two other crystalline silicon battery strings 2011 are electrically connected to the eighth bus bar 2013. Figure 5 The crystalline silicon battery component 201 and Figure 6 When the perovskite battery assembly 100 is assembled, the third bus bar 2011j and the sixth bus bar 5 are welded, and the third bus bar 2011j and the sixth bus bar 5 have the same polarity, and the fourth bus bar 2011k and the fifth bus bar 4 are welded, and the fourth bus bar 2011k and the fifth bus bar 4 have the same polarity. For example, the current flow path of the crystalline silicon battery assembly 201 is as follows: Figure 5 As shown by arrow A.

[0081] When the crystalline silicon cell assembly 201 includes eight crystalline silicon cell strings 2011, Figure 7 As shown, four crystalline silicon cell strings 2011 are located at the left part of the crystalline silicon cell assembly 201, and another four crystalline silicon cell strings 2011 are located at the right part of the crystalline silicon cell assembly 201, and two seventh bus bars 2012 and eight bus bars 2013 are provided respectively. The crystalline silicon cell assembly 201 also includes a ninth bus bar 2014, and the left sides of the two crystalline silicon cell strings 2011 adjacent to the front end of the above four crystalline silicon cell strings 2011 are both electrically connected to one seventh bus bar 2012, and the left sides of the two crystalline silicon cell strings 2011 adjacent to the rear end of the above four crystalline silicon cell strings 2011 are both electrically connected to another seventh bus bar 2012, and the right sides of the two crystalline silicon cell strings 2011 adjacent to the middle of the above four crystalline silicon cell strings 2011 are both electrically connected to the ninth bus bar 2014. The right sides of the two adjacent crystalline silicon cell strings 2011 at the front end of the other four crystalline silicon cell strings 2011 are electrically connected to an eighth bus bar 2013, the right sides of the two adjacent crystalline silicon cell strings 2011 at the rear end of the other four crystalline silicon cell strings 2011 are electrically connected to another eighth bus bar 2013, and the left sides of the two adjacent crystalline silicon cell strings 2011 in the middle of the other four crystalline silicon cell strings 2011 are electrically connected to the ninth bus bar 2014. Figure 7 The crystalline silicon battery component 201 and Figure 8 When the perovskite battery assembly 100 is assembled, the third bus bar 2011j and the sixth bus bar 5 are welded, and the third bus bar 2011j and the sixth bus bar 5 have the same polarity, and the fourth bus bar 2011k and the fifth bus bar 4 are welded, and the fourth bus bar 2011k and the fifth bus bar 4 have the same polarity. For example, the current flow path of the crystalline silicon battery assembly 201 is as follows: Figure 7 As shown by arrow A.

[0082] When the crystalline silicon cell assembly 201 includes twelve crystalline silicon cell strings 2011, Fig. 9As shown, six crystalline silicon cell strings 2011 are located in the left part of the crystalline silicon cell assembly 201, and another six crystalline silicon cell strings 2011 are located in the right part of the crystalline silicon cell assembly 201. There are three seventh bus bars 2012 and three eighth bus bars 2013, respectively, and the crystalline silicon cell assembly 201 also includes two ninth bus bars 2014. Among the above six crystalline silicon cell strings 2011, the left sides of the first crystalline silicon cell string 2011 and the second crystalline silicon cell string 2011 from front to back are both electrically connected to the first seventh bus bar 2012, the left sides of the third crystalline silicon cell string 2011 and the fourth crystalline silicon cell string 2011 are both electrically connected to the second seventh bus bar 2012, and the left sides of the fifth crystalline silicon cell string 2011 and the sixth crystalline silicon cell string 2011 are both electrically connected to the third seventh bus bar 2012. The right side surface of the first crystalline silicon cell string 2011 is electrically connected to the third bus bar 2011j, the right side surfaces of the second crystalline silicon cell string 2011 and the third crystalline silicon cell string 2011 are both electrically connected to the first ninth bus bar 2014, the right side surfaces of the fourth crystalline silicon cell string 2011 and the fifth crystalline silicon cell string 2011 are both electrically connected to the second ninth bus bar 2014, and the right side surface of the sixth crystalline silicon cell string 2011 is electrically connected to the fourth bus bar 2011k.

[0083] Among the other six crystalline silicon cell strings 2011 mentioned above, the right sides of the first crystalline silicon cell string 2011 and the second crystalline silicon cell string 2011 from front to back are both electrically connected to the first eighth bus bar 2013, the right sides of the third crystalline silicon cell string 2011 and the fourth crystalline silicon cell string 2011 are both electrically connected to the second eighth bus bar 2013, and the right sides of the fifth crystalline silicon cell string 2011 and the sixth crystalline silicon cell string 2011 are both electrically connected to the third eighth bus bar 2013. The left side of the first crystalline silicon cell string 2011 is electrically connected to the third bus bar 2011j, the left sides of the second crystalline silicon cell string 2011 and the third crystalline silicon cell string 2011 are both electrically connected to the first ninth bus bar 2014, the left sides of the fourth crystalline silicon cell string 2011 and the fifth crystalline silicon cell string 2011 are both electrically connected to the second ninth bus bar 2014, and the left side of the sixth crystalline silicon cell string 2011 is electrically connected to the fourth bus bar 2011k. Fig. 9 The crystalline silicon battery component 201 and Fig.10 When the perovskite battery assembly 100 is assembled, the third bus bar 2011j and the sixth bus bar 5 are welded, and the third bus bar 2011j and the sixth bus bar 5 have the same polarity, and the fourth bus bar 2011k and the fifth bus bar 4 are welded, and the fourth bus bar 2011k and the fifth bus bar 4 have the same polarity. For example, the current flow path of the crystalline silicon battery assembly 201 is as follows: Fig. 9As shown by the arrow A. It should be noted that the number and arrangement of the perovskite sub-cells 16 and the crystalline silicon cell strings 2011 can be specifically set according to actual use to better meet the actual application.

[0084] The preparation process of the battery assembly 200 is as follows: First, lay the adhesive film 204 on the seal 202. Then, lay the crystalline silicon battery assembly 201 that is welded in series and arranged. Subsequently, lay the adhesive film 204 on the side of the crystalline silicon battery assembly 201 away from the seal 202. Next, lay the deposited and cut perovskite battery assembly 100, weld the first bus bar 2 and the fourth bus bar 2011k, ​​and weld the second bus bar 3 and the third bus bar 2011j. Finally, lamination is performed.

[0085] The photovoltaic assembly (not shown) according to the embodiment of the third aspect of the utility model comprises the battery assembly 200 according to the embodiment of the second aspect of the utility model.

[0086] According to the photovoltaic assembly of the utility model, by adopting the above-mentioned battery assembly 200, it is convenient to draw out the current of the photovoltaic assembly, thereby facilitating improving the performance of the photovoltaic assembly.

[0087] A photovoltaic power generation system (not shown) according to an embodiment of the fourth aspect of the utility model comprises a photovoltaic assembly according to an embodiment of the third aspect of the utility model.

[0088] According to the photovoltaic power generation system of the utility model, by adopting the above-mentioned photovoltaic components, it is convenient to draw out the current of the photovoltaic power generation system, thereby facilitating improving the performance of the photovoltaic power generation system.

[0089] Other structures and operations of the battery assembly 200, photovoltaic assembly and photovoltaic power generation system according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0090] In the description of the present invention, it is necessary to understand that the terms "center", "thickness", "up", "down", "front", "back", "left", "right", "inside", "outside", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0092] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A perovskite battery assembly, characterized in that: include: A perovskite cell, the perovskite cell comprising a conductive layer; A first bus bar, wherein the first bus bar is disposed on a side of the perovskite cell, and the first bus bar is electrically connected to the conductive layer.

2. The perovskite battery assembly according to claim 1, characterized in that: The conductive layer comprises: A first conductive layer portion, the first conductive layer portion being disposed on one side in a thickness direction of the perovskite cell; A second conductive layer portion, wherein the second conductive layer portion is connected to the first conductive layer portion, the second conductive layer portion is located on a side of the perovskite cell, and the first bus bar is connected to the second conductive layer portion.

3. The perovskite battery assembly according to claim 2, characterized in that: The first bus bar is connected to a surface of the second conductive layer portion that is away from the center of the perovskite cell.

4. The battery assembly according to claim 2, characterized in that: The first conductive layer portion and the second conductive layer portion are an integrally formed part.

5. The perovskite battery assembly according to any one of claims 1 to 4, characterized in that: The perovskite cell further includes a conductive glass member, wherein the conductive glass member and the conductive layer are respectively located on two sides of the perovskite cell in a thickness direction; The perovskite battery assembly further comprises: A second bus bar, wherein the second bus bar is disposed on another side of the perovskite cell opposite to the first bus bar, and the second bus bar is electrically connected to the conductive glass member.

6. The perovskite battery assembly according to claim 5, characterized in that: At least the side surface of the conductive glass member corresponding to the side where the second bus bar is located extends beyond the corresponding side surface of the remaining part of the perovskite cell except the conductive glass member, and the second bus bar is connected to the side surface of the conductive glass member facing the first bus bar in the thickness direction.

7. A battery assembly, characterized in that: include: A perovskite battery assembly, wherein the perovskite battery assembly is a perovskite battery assembly according to any one of claims 1 to 6; A crystalline silicon cell assembly, wherein the crystalline silicon cell assembly is arranged on one side of the perovskite cell assembly in the thickness direction.

8. The battery assembly according to claim 7, characterized in that: Further including: A sealing member, wherein the sealing member and the conductive glass member of the perovskite cell assembly together define a receiving cavity, and the remaining portion of the perovskite cell assembly except the conductive glass member and the crystalline silicon cell assembly are located in the receiving cavity.

9. The battery assembly according to claim 8, characterized in that: The sealing element comprises: A first sealing portion, wherein the first sealing portion is disposed on a side of the crystalline silicon cell assembly away from the perovskite cell assembly; A second sealing portion, one end of the second sealing portion is connected to the outer peripheral side of the first sealing portion, and the other end of the second sealing portion extends toward the conductive glass member, and the first sealing portion, the second sealing portion and the conductive glass member jointly define the accommodating cavity.

10. The battery assembly according to claim 8 or 9, characterized in that: The sealing member is a tempered glass member.

11. A photovoltaic module, characterized in that: Comprising a battery assembly according to any one of claims 7-10.

12. A photovoltaic power generation system, characterized in that: Comprising the photovoltaic module according to claim 11.

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