Silicon-calcium laminated structure and four-terminal silicon-calcium laminated battery

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a silicon-calcium laminated structure and a four-terminal silicon-calcium laminated battery, and the silicon-calcium laminated structure comprises a perovskite battery layer, a crystalline silicon battery layer and a backboard layer. The perovskite cell layer comprises a single perovskite cell; the crystalline silicon cell layer comprises a plurality of crystalline silicon cell strings extending along a first direction, the plurality of crystalline silicon cell strings are arranged side by side along a second direction, and two adjacent strings of the plurality of crystalline silicon cell strings are connected in series end to end; the crystalline silicon cell layer covers the perovskite cell layer; the back plate layer covers the crystalline silicon cell layer; the backboard layer is provided with a first lead-out hole and a second lead-out hole, the first lead of the perovskite cell layer is led out through the first lead-out hole, and the second leads of the two outermost strings in the plurality of crystal silicon cell strings are led out through the second lead-out hole. According to the utility model, the layout and size requirements between the perovskite cell end and the crystal silicon cell end can be met, the lead is prevented from influencing the packaging process, and the product packaging difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a silicon-calcium laminate structure and a four-terminal silicon-calcium laminate battery. Background Art

[0002] The four-terminal calcium-silicon tandem cell is an advanced solar cell technology that combines crystalline silicon solar cells and perovskite solar cells. This cell stacks two different types of solar cells together, leveraging their respective strengths to improve solar energy conversion efficiency. The four-terminal calcium-silicon tandem cell consists of a high-efficiency silicon-based cell and a perovskite cell, separated by an insulating layer. This prevents short circuits and improves the cell's structural strength and stability.

[0003] In the prior art, four-terminal calcium silicon laminated batteries are encapsulated on all sides by an encapsulation frame or an encapsulation adhesive layer. The leads of the batteries all pass through the encapsulation frame or the encapsulation adhesive layer to connect to the external circuit. However, the leads freely extending from the side ends will affect the encapsulation process of the encapsulation frame or the encapsulation adhesive layer, increasing the difficulty of encapsulation. Utility Model Content

[0004] The purpose of the utility model is to provide a calcium silicon laminate structure and a four-terminal calcium silicon laminate battery to solve the problem in the prior art that the leads freely extending from the side ends will affect the packaging process of the packaging frame or the packaging glue layer, thereby increasing the difficulty of packaging the four-terminal calcium silicon laminate battery.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the present invention provides a calcium silicon laminate structure, comprising:

[0007] A perovskite cell layer, wherein the perovskite cell layer includes a single perovskite cell;

[0008] a crystalline silicon cell layer, the crystalline silicon cell layer comprising a plurality of crystalline silicon cell strings extending along a first direction, the plurality of crystalline silicon cell strings being arranged side by side along a second direction, and two adjacent strings of the plurality of crystalline silicon cell strings being arranged end to end in series; the crystalline silicon cell layer being overlying the perovskite cell layer;

[0009] A backplane layer, the backplane layer is covered on the crystalline silicon cell layer; the backplane layer is provided with a first lead-out hole and a second lead-out hole, the first lead of the perovskite cell layer is led out through the first lead-out hole, and the second lead of the two outermost strings of the multiple strings of crystalline silicon cell strings are led out through the second lead-out hole.

[0010] As an optional solution to the above-mentioned silicon-calcium laminate structure, the first lead-out hole and the second lead-out hole are both located on the same side of the backplane layer, and the first lead-out hole is arranged closer to the edge of the backplane layer relative to the second lead-out hole.

[0011] As an optional solution of the above-mentioned silicon-calcium laminate structure, the second lead-out holes include two, and the two second lead-out holes are respectively located on two opposite sides of the first lead-out hole along the second direction.

[0012] As an optional solution to the above-mentioned calcium silicon laminate structure, the calcium silicon laminate structure also includes a bus assembly, and the multiple strings of crystalline silicon battery strings are an odd number of strings; the bus assembly is arranged around the multiple strings of crystalline silicon battery strings, and is used to transfer the second leads of the two outermost crystalline silicon battery strings away from the second lead-out hole to the second lead-out hole.

[0013] As an optional solution to the above-mentioned silicon-calcium laminate structure, the busbar assembly includes a head busbar, a side busbar and a bottom busbar, and the head busbar, the side busbar and the bottom busbar are arranged in sequence; the head busbar is arranged on the side close to the second lead-out hole along the first direction, and the bottom busbar is arranged on the side away from the second lead-out hole along the first direction.

[0014] As an optional solution to the above-mentioned silicon-calcium laminate structure, the second lead-out hole covers the head bus bar.

[0015] As an optional solution to the above-mentioned silicon-calcium laminate structure, the first lead-out hole and the head bus bar are spaced apart along the first direction.

[0016] As an optional solution to the above-mentioned silicon-calcium laminate structure, the first lead of the perovskite cell layer is sealed and bonded to the first lead-out hole, and the second lead of the outermost two strings of the multiple strings of crystalline silicon cell strings are sealed and bonded to the second lead-out hole.

[0017] As an optional solution to the above-mentioned silicon-calcium stacked structure, an adhesive film layer is provided between the perovskite cell layer and the crystalline silicon cell layer, and between the crystalline silicon cell layer and the backplane layer.

[0018] On the other hand, the present invention provides a four-terminal calcium-silicon laminate battery, comprising the calcium-silicon laminate structure as described above.

[0019] The beneficial effects of the utility model are:

[0020] The silicon-calcium stacked structure includes a perovskite cell layer, a crystalline silicon cell layer, and a backplane layer. The perovskite cell layer includes a single perovskite cell, and the crystalline silicon cell layer includes multiple strings of crystalline silicon cells extending along a first direction. The multiple strings of crystalline silicon cells are arranged side by side along a second direction, and two adjacent strings of crystalline silicon cells are arranged end to end in series. The crystalline silicon cell layer is overlaid on the perovskite cell layer, so that the perovskite cell end is arranged as a single cell, while the crystalline silicon cell end is arranged as a multiple cell array, thereby meeting the layout and size requirements between the perovskite cell end and the crystalline silicon cell end. Among them, the backplane layer is covered on the crystalline silicon battery layer, and the backplane layer is provided with a first lead-out hole and a second lead-out hole. The first lead of the perovskite battery layer is led out through the first lead-out hole, and the second leads of the two outermost strings in the multiple strings of crystalline silicon battery cells are led out through the second lead-out hole. Therefore, the first lead between the perovskite battery layer and the outside world and the second lead between the crystalline silicon battery layer and the outside world can be fixed and limited respectively through the first lead-out hole and the second lead-out hole, thereby preventing the leads from affecting the packaging process and reducing the difficulty of product packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a calcium-silicon laminate structure provided by an embodiment of the present invention from a first perspective;

[0022] Figure 2 This is a schematic structural diagram from a second perspective of the calcium-silicon laminate structure provided by an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Perovskite cell layer; 11. Single perovskite cell; 2. Crystalline silicon cell layer; 21. Crystalline silicon cell string; 3. Backplane layer; 31. First lead-out hole; 32. Second lead-out hole; 4. Busbar assembly; 41. Head busbar; 42. Side busbar; 43. Bottom busbar; 5. Film layer. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides a silicon-calcium laminate structure, which can facilitate layout and reduce the difficulty of product packaging.

[0030] The silicon-calcium stacked structure includes a perovskite cell layer 1, a crystalline silicon cell layer 2, and a backplane layer 3. The perovskite cell layer 1 includes a single perovskite cell 11, and the crystalline silicon cell layer 2 includes multiple crystalline silicon cell strings 21 extending along a first direction (i.e., the X direction in the figure). The multiple crystalline silicon cell strings 21 are arranged side by side along a second direction (i.e., the Y direction in the figure), and two adjacent strings of the multiple crystalline silicon cell strings 21 are arranged in series end to end. The crystalline silicon cell layer 2 is overlaid on the perovskite cell layer 1, so that the perovskite cell end is a single cell arrangement, and the crystalline silicon cell end is arranged as a multiple cell array arrangement, thereby meeting the layout and size requirements between the perovskite cell end and the crystalline silicon cell end. The first direction and the second direction are arranged perpendicular to each other.

[0031] Among them, the backplane layer 3 is covered on the crystalline silicon cell layer 2, and the backplane layer 3 is provided with a first lead-out hole 31 and a second lead-out hole 32. The first lead of the perovskite cell layer 1 is led out through the first lead-out hole 31, and the second lead of the two outermost strings of the multiple crystalline silicon cell strings 21 is led out through the second lead-out hole 32. Therefore, the first lead-out hole 31 and the second lead-out hole 32 can respectively fix and limit the first lead between the perovskite cell layer 1 and the outside world and the second lead between the crystalline silicon cell layer 2 and the outside world, preventing the leads from affecting the packaging process and reducing the difficulty of product packaging. Optionally, the backplane layer 3 is a backplane glass.

[0032] Furthermore, the first lead-out hole 31 and the second lead-out hole 32 are both located on the same side of the backplane layer 3, and the first lead-out hole 31 is arranged closer to the edge of the backplane layer 3 relative to the second lead-out hole 32, so that the first lead-out hole 31 and the second lead-out hole 32 can be distinguished, making it easier for staff to identify the first lead-out hole 31 and the second lead-out hole 32. There are two second lead-out holes 32, which are located on opposite sides of the first lead-out hole 31 along the second direction, so that the second leads of the outermost two strings of the multi-string crystalline silicon cell string 21 can be led out from the two lead-out holes in a one-to-one correspondence, thereby reducing the difficulty of lead arrangement.

[0033] Furthermore, the multiple strings of crystalline silicon cell strings 21 are an odd number of strings, so that after two adjacent strings are connected in series end to end, the second leads of the two outermost strings in the multiple strings of crystalline silicon cell strings 21 are distributed on different sides of the backplane layer 3 along the first direction, wherein the silicon-calcium laminate structure also includes a bus assembly 4, which is arranged around the outside of the multiple strings of crystalline silicon cell strings 21 and is used to transfer the second leads of the two outermost crystalline silicon cell strings 21 away from the second lead-out hole 32 to the second lead-out hole 32, thereby further reducing the difficulty of arranging the leads.

[0034] Specifically, the busbar assembly 4 includes a header busbar 41, a side busbar 42, and a bottom busbar 43. The header busbar 41, the side busbar 42, and the bottom busbar 43 are sequentially connected. The header busbar 41 is arranged on a side close to the second lead-out hole 32 along the first direction, and the bottom busbar 43 is arranged on a side away from the second lead-out hole 32 along the first direction. As a result, the current of the crystalline silicon cell string 21 can be guided to the header busbar 41 by the bottom busbar 43 and the side busbar 42, thereby facilitating the arrangement of the second lead at the second lead-out hole 32. The second lead-out hole 32 covers the header busbar 41, so that the second lead led from the header busbar 41 can be directly led out of the second lead-out hole 32, reducing the difficulty of lead arrangement. At the same time, the first lead-out hole 31 and the header bus bar 41 are spaced apart along the first direction to prevent the header bus bar 41 from blocking the first lead-out hole 31 and thus avoid affecting the leading-out of the first lead wire through the first lead-out hole 31 .

[0035] Furthermore, the first lead of the perovskite cell layer 1 is sealed and bonded to the first lead-out hole 31 , and the second lead of the two outermost strings of the multi-string crystalline silicon cell string 21 is sealed and bonded to the second lead-out hole 32 , thereby achieving packaging and fixation.

[0036] Furthermore, an adhesive film layer 5 is provided between the perovskite cell layer 1 and the crystalline silicon cell layer 2, and between the crystalline silicon cell layer 2 and the backplane layer 3. The adhesive film layer 5 can protect and enhance the efficiency of the perovskite cell layer 1 and the crystalline silicon cell layer 2.

[0037] This embodiment also provides a four-terminal calcium silicon stack battery, including the calcium silicon stack structure as described above. By using the calcium silicon stack structure as described above, the four-terminal calcium silicon stack battery can meet the layout and size requirements between the perovskite cell terminal and the crystalline silicon cell terminal, prevent the lead from affecting the packaging process, and reduce the packaging difficulty of the product.

[0038] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A calcium silicon laminate structure, characterized in that: include: A perovskite battery layer (1), wherein the perovskite battery layer (1) comprises a single perovskite battery (11); A crystalline silicon cell layer (2), the crystalline silicon cell layer (2) comprising a plurality of crystalline silicon cell strings (21) extending along a first direction, the plurality of crystalline silicon cell strings (21) being arranged side by side along a second direction, and two adjacent strings of the plurality of crystalline silicon cell strings (21) being arranged end to end in series; the crystalline silicon cell layer (2) being arranged to cover the perovskite cell layer (1); A backplane layer (3), the backplane layer (3) being arranged on the crystalline silicon cell layer (2); the backplane layer (3) being provided with a first lead-out hole (31) and a second lead-out hole (32); the first lead of the perovskite cell layer (1) being led out via the first lead-out hole (31), and the second lead of the two outermost strings of the plurality of crystalline silicon cell strings (21) being led out via the second lead-out hole (32).

2. The calcium silicon laminate structure according to claim 1, characterized in that: The first lead-out hole (31) and the second lead-out hole (32) are both located on the same side of the backboard layer (3), and the first lead-out hole (31) is arranged closer to the edge of the backboard layer (3) relative to the second lead-out hole (32).

3. The calcium silicon laminate structure according to claim 2, characterized in that: The second outlet holes (32) include two, and the two second outlet holes (32) are respectively located on two opposite sides of the first outlet hole (31) along the second direction.

4. The calcium silicon laminate structure according to claim 3, characterized in that: The calcium silicon laminate structure further includes a bus assembly (4), and the plurality of crystalline silicon cell strings (21) are an odd number of strings; the bus assembly (4) is arranged around the plurality of crystalline silicon cell strings (21) and is used to transfer the second leads of the two outermost crystalline silicon cell strings (21) away from the second lead-out hole (32) to the second lead-out hole (32).

5. The calcium silicon laminate structure according to claim 4, characterized in that: The busbar assembly (4) comprises a head busbar (41), a side busbar (42) and a bottom busbar (43), wherein the head busbar (41), the side busbar (42) and the bottom busbar (43) are sequentially connected and arranged; the head busbar (41) is arranged on a side close to the second lead-out hole (32) along the first direction, and the bottom busbar (43) is arranged on a side away from the second lead-out hole (32) along the first direction.

6. The calcium silicon laminate structure according to claim 5, characterized in that: The second lead-out hole (32) covers the head bus bar (41).

7. The calcium silicon laminate structure according to claim 5, characterized in that: The first lead-out hole (31) and the head bus bar (41) are spaced apart along the first direction.

8. The calcium silicon laminate structure according to any one of claims 1 to 7, characterized in that: The first lead of the perovskite cell layer (1) is sealed and bonded to the first lead-out hole (31), and the second lead of the two outermost strings of the multiple strings of crystalline silicon cell strings (21) is sealed and bonded to the second lead-out hole (32).

9. The calcium silicon laminate structure according to any one of claims 1 to 7, characterized in that: An adhesive film layer (5) is provided between the perovskite cell layer (1) and the crystalline silicon cell layer (2), and between the crystalline silicon cell layer (2) and the backplane layer (3).

10. A four-terminal calcium silicon stack battery, characterized in that: It comprises the calcium silicon laminate structure as claimed in any one of claims 1 to 9.

Images