Welding packaging structure for packaging perovskite battery and battery assembly

Abstract

The utility model relates to the technical field of battery packaging, in particular to a welding packaging structure for packaging a perovskite battery and a battery assembly. The welding packaging structure comprises a cover plate, a back plate and a packaging unit, wherein the cover plate and the back plate are oppositely arranged; a battery piece is placed between the cover plate and the back plate; the packaging unit is arranged on the outer side of the battery piece in a surrounding mode and connected with the cover plate and the back plate in a sealed mode. According to the utility model, the packaging unit is used as the filler between the cover plate and the back plate, a mode of coating glass slurry for multiple times in the prior art is replaced, and only the joints of the packaging unit, the cover plate and the back plate are coated with the glass slurry, so that on one hand, the use of the glass slurry is reduced, and the cost is greatly reduced; and on the other hand, the connection parts of the packaging unit and the cover plate and the back plate only need to be coated with the glass slurry, that is, the sealing of the battery piece can be realized by only coating and sintering twice at least, and the problem that the packaging height can be reached by coating and sintering the glass slurry for multiple times is avoided, so that the working efficiency is improved, and the productivity is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packaging, and in particular to a welding packaging structure and a battery assembly for packaging perovskite batteries. Background Art

[0002] Perovskite cells are ABX3-type compound cells with a perovskite crystal structure, with the molecular formula ABX3. The A position is typically an organic cation, an inorganic cation, or a mixture; the B position is typically a divalent cation; and the C position is typically a monovalent halogen anion. Since the first single-junction cell with a conversion efficiency of 3.8% was produced in 2009, after more than a decade of research, the highest conversion efficiencies have reached 26.41% for single-junction perovskite cells and 33.9% for tandem perovskite cells. As a next-generation photovoltaic cell technology, it offers advantages such as high ultimate efficiency, adjustable band gap, and low manufacturing costs. However, large-scale application and longevity remain to be improved. Compared to crystalline silicon cells, which have a lifespan of over 25 years, perovskite cells have a significantly shorter lifespan. The lifespan of a perovskite cell is related to its stability, which is often related to the instability of the perovskite crystal structure and external conditions. For example, water and oxygen in the environment can cause the perovskite to decompose, rendering the cell inoperable. Referring to crystalline silicon cells, polymer films such as ethylene vinyl acetate (EVA) and polyolefin (POE) are commonly used as battery packaging materials, and their water vapor barrier capacity (WVTR) is 40g / m 2 / day, far higher than the perovskite cell water vapor barrier capacity (WVTR) standard of 10 -4 -10 -6 g / m 2 At present, the organic light-emitting materials in the OLED industry also have very high requirements for the water vapor barrier capability of device packaging, reaching 10 -6 g / m 2 One packaging technology uses glass paste welding to effectively seal the organic material, effectively ensuring its lifespan. This packaging technology has become an important reference. Currently, various glass paste welding sealing solutions are designed for perovskite solar cell modules. However, these technologies have several drawbacks: 1. Glass paste is expensive and requires high usage, resulting in high costs and an inability to meet the ultra-low cost requirements of photovoltaics. 2. The glass paste seals at a submillimeter level, while OLED packaging heights are micrometers. This requires repeated application of glass paste and welding to achieve the seal height, resulting in a slow process cycle, low efficiency, and low production capacity. Utility Model Content

[0003] The utility model provides a welding packaging structure and battery assembly for packaging perovskite batteries, which is used to solve the defects of the glass paste welding sealing technology used for batteries in the prior art, such as large amount of glass paste used, high price, multiple coating and welding molding requirements, low work efficiency and low production capacity.

[0004] The utility model provides a fusion packaging structure for packaging perovskite cells, comprising:

[0005] A cover plate and a back plate are arranged opposite to each other, and the battery cells are placed between the cover plate and the back plate;

[0006] The packaging unit is arranged around the outside of the battery cell and is sealed with the cover plate and the back plate.

[0007] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the packaging unit is arranged between the cover plate and the back plate, the first side of the packaging unit is pressed together with the cover plate, and the second side of the packaging unit is pressed together with the back plate.

[0008] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, strip-shaped sealing materials are respectively arranged on the inner wall of the packaging unit and close to the first side surface and the second side surface, and strip-shaped sealing materials are respectively arranged on the outer wall of the packaging unit and close to the first side surface and the second side surface, so that the packaging unit is sealed and connected to the cover plate and the back plate.

[0009] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the packaging unit is arranged between the cover plate and the back plate, a sealing material is arranged between the first side of the packaging unit and the cover plate, and a sealing material is arranged between the second side of the packaging unit and the back plate.

[0010] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the sealing material arranged between the packaging unit and the cover plate is a surface-type sealing material covering the first side surface, and the sealing material arranged between the packaging unit and the back plate is a surface-type sealing material covering the second side surface.

[0011] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the packaging unit is arranged on the outside of the cover plate and the back plate, and sealing materials are arranged between the inner side surface of the packaging unit and the cover plate and the back plate respectively.

[0012] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the sealing material arranged between the packaging unit and the cover plate is a surface-type sealing material covering the outer side surface of the cover plate, and the sealing material arranged between the packaging unit and the back plate is a surface-type sealing material covering the outer side surface of the back plate.

[0013] The fusion packaging structure for packaging perovskite cells provided by the present invention further includes: columns, which are supported between the cover plate and the back plate and are separated between two adjacent battery cells.

[0014] According to the fusion packaging structure for packaging perovskite cells provided by the present invention, the packaging unit is a glass edge sealing strip.

[0015] The present invention further provides a battery assembly, comprising: the fusion packaging structure for packaging perovskite batteries in the above-mentioned embodiment of the present invention.

[0016] The utility model provides a fusion-bonded packaging structure for packaging perovskite cells. The utility model is mainly used for packaging perovskite cells and includes: a cover plate and a back plate arranged opposite to each other, and a packaging unit; a cell is placed between the cover plate and the back plate; and the packaging unit is arranged around the outside of the cell and is sealed to the cover plate and the back plate. By using the packaging unit as a filler between the cover plate and the back plate, instead of applying glass paste multiple times between the cover plate and the back plate as in the prior art, the glass paste can be applied only at the connection between the packaging unit and the cover plate and the back plate. Therefore, the fusion-bonded packaging structure for packaging perovskite cells provided by the utility model reduces the use of glass paste, greatly reducing costs. On the other hand, the glass paste only needs to be applied to the connection between the packaging unit and the cover plate and the back plate. That is, the sealing of the cell can be achieved by applying and sintering at least twice, avoiding the problem of multiple applications and sintering of glass paste to achieve the packaging height, thereby improving work efficiency and further increasing production capacity.

[0017] Furthermore, the battery assembly provided by the present invention has the same advantages as above because it includes the fusion packaging structure for packaging perovskite batteries in the above-mentioned embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1It is a structural schematic diagram of a fusion packaging structure for packaging perovskite cells provided in one embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of a fusion packaging structure for packaging perovskite cells provided in one embodiment of the present invention.

[0021] Figure 3 It is a structural schematic diagram of a fusion packaging structure for packaging perovskite cells provided in one embodiment of the present invention.

[0022] Figure 4 It is a structural schematic diagram of a fusion packaging structure for packaging perovskite cells provided in one embodiment of the present invention.

[0023] Reference numerals:

[0024] 1: Cover plate; 2: Back plate; 3: Packaging unit; 4: Sealing material; 5: Battery cell; 6: Adhesive film; 7: Pillar. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. 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 creative efforts are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" 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, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like mean 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 embodiment of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0030] The following combination Figure 1-Figure 4 The utility model describes a welding packaging structure for packaging perovskite cells. The welding packaging structure for packaging perovskite cells comprises: a cover plate 1 and a back plate 2 arranged opposite to each other, and a packaging unit 3.

[0031] The battery cell 5 is placed between the cover plate 1 and the back plate 2 ; the packaging unit 3 is arranged around the outside of the battery cell 5 and is sealed to the cover plate 1 and the back plate 2 .

[0032] Specifically, if Figures 1 to 4As shown, the cover plate 1, battery cells 5, and back plate 2 are stacked from top to bottom, forming a "sandwich" structure. The battery cells 5, except for their top and bottom outer surfaces, require encapsulation or sealing. Component encapsulation involves applying external materials (glass, adhesive film 6, edge encapsulation materials, etc.) through a process to isolate the battery cells 5 from the external environment and protect the battery. As described in the background, conventional sealing methods using glass paste welding are expensive and require repeated coating and welding.

[0033] Therefore, in the embodiment of the present invention, a packaging unit 3 is provided on the outer side of the cell 5, and the packaging unit 3 is sealed to the cover plate 1 and the back plate 2 respectively. When sealing the packaging unit 3 with the cover plate 1 and the back plate 2, the above-mentioned glass paste melt-blown sealing method, that is, the method of applying the sealing material 4, can still be used. The sealing material 4 used in the following embodiments can all be glass paste. However, due to the presence of the packaging unit 3, which acts as a filler between the cover plate 1 and the back plate 2, it is not necessary to repeatedly apply the glass paste between the cover plate 1 and the back plate 2 multiple times to achieve the packaging height. Instead, it is only necessary to apply the glass paste at the connection between the packaging unit 3 and the cover plate 1 and the back plate 2 to achieve the sealed packaging. On the one hand, the use of glass paste is reduced, which greatly reduces the cost. On the other hand, it is only necessary to apply the glass paste at the connection between the packaging unit 3 and the cover plate 1 and the back plate 2. In other words, at least two applications and sintering are required to achieve the sealing of the cell 5, avoiding the problem of multiple applications and sintering of the glass paste to achieve the packaging height, thereby improving work efficiency and further increasing production capacity.

[0034] The present invention provides a fusion-bonded packaging structure for packaging perovskite cells. The present invention is mainly used for packaging perovskite cells and comprises: a cover plate 1 and a back plate 2 arranged opposite to each other, and a packaging unit 3; a cell 5 is placed between the cover plate 1 and the back plate 2; and the packaging unit 3 is arranged around the outside of the cell 5 and is sealed to the cover plate 1 and the back plate 2. By using the packaging unit 3 as a filler between the cover plate 1 and the back plate 2, instead of applying glass paste multiple times between the cover plate 1 and the back plate 2 as in the prior art, a sealing material 4 can be applied only at the connection between the packaging unit 3 and the cover plate 1 and the back plate 2. Therefore, the fusion-bonded packaging structure for packaging perovskite cells provided by the present invention reduces the use of glass paste, greatly reducing costs. On the other hand, the glass paste only needs to be applied at the connection between the packaging unit 3 and the cover plate 1 and the back plate 2. That is, the sealing of the cell 5 can be achieved by applying and sintering at least twice, avoiding the problem of multiple applications and sintering of glass paste to achieve the packaging height, thereby improving work efficiency and further increasing production capacity.

[0035] In one embodiment of the present invention, the packaging unit 3 is provided between the cover plate 1 and the back plate 2, the first side surface (i.e., the upper side surface) of the packaging unit 3 is pressed and fitted with the cover plate 1, and the second side surface (i.e., the lower side surface) of the packaging unit 3 is pressed and fitted with the back plate 2. Figure 1 As shown, in this embodiment, the packaging unit 3 is arranged in a ring-shaped structure around the outer side of the battery cell 5, and the upper end face is pressed and fitted with the cover plate 1, and the lower end face is pressed and fitted with the back plate 2. The packaging unit 3 is connected to the cover plate 1 and the back plate 2 by a sealed connection to ensure its packaging performance. In this embodiment, the fusion packaging structure for packaging perovskite cells has a sealing connection and a press fit inside the cover plate 1 and the back plate 2. Under the premise of ensuring the sealing safety of the battery, it does not occupy additional height space and has a small volume.

[0036] Based on the above embodiment, strips of sealing material 4 are respectively arranged on the inner sidewalls of the packaging unit 3, near the first and second side surfaces, and on the outer sidewalls of the packaging unit 3, near the first and second side surfaces, to achieve a sealed connection between the packaging unit 3 and the cover plate 1 and back plate 2. In this embodiment, since the packaging unit 3 is pressed tightly against the cover plate 1 and back plate 2, the sealing material 4 is respectively applied to the inner and outer sidewalls of the packaging unit 3, near the upper and lower contact surfaces, thereby achieving a sealed connection between the packaging unit 3 and the cover plate 1 and back plate 2. In this embodiment, the strips of sealing material 4 applied to the inner and outer sidewalls of the packaging unit 3 ensure a sealed connection between the packaging unit 3 and the cover plate 1 and back plate 2, while also reducing the amount of sealing material 4 used.

[0037] In one embodiment of the present invention, the packaging unit 3 is provided between the cover plate 1 and the back plate 2, a sealing material 4 is arranged between the first side surface (i.e., the upper side surface) of the packaging unit 3 and the cover plate 1, and a sealing material 4 is arranged between the second side surface (i.e., the lower side surface) of the packaging unit 3 and the back plate 2. Figure 2 As shown, in this embodiment, the packaging unit 3 is annular and arranged around the outside of the battery cell 5. The upper end surface is sealed to the cover plate 1 by a sealing material 4, and the lower end surface is sealed to the back plate 2 by a sealing material 4. The packaging unit 3 is connected to the cover plate 1 and the back plate 2 by the sealing material 4, ensuring its packaging performance. In this embodiment, the fusion packaging structure for packaging perovskite cells has a sealing connection between the packaging unit 3 and the inside of the cover plate 1 and the back plate 2. Under the premise of ensuring the sealing safety of the battery, the sealing material 4 is applied to the upper and lower surfaces of the packaging unit 3 to achieve better sealing performance.

[0038] Based on the above embodiment, the sealing material 4 arranged between the packaging unit 3 and the cover plate 1 is a surface-type sealing material 4 covering the first side surface, and the sealing material 4 arranged between the packaging unit 3 and the back plate 2 is a surface-type sealing material 4 covering the second side surface. In this embodiment, by coating the surface-type sealing material 4 on both the upper contact surface between the packaging unit 3 and the cover plate 1 and the lower contact surface between the packaging unit 3 and the back plate 2, compared with the above embodiment, although more sealing material 4 is used, it can ensure good overall sealing performance of the fusion packaging structure used to package the perovskite cell.

[0039] In one embodiment of the present invention, the packaging unit 3 is provided on the outside of the cover plate 1 and the back plate 2, and a sealing material 4 is arranged between the inner side of the packaging unit 3 and the cover plate 1 and the back plate 2. Figure 3 As shown, in this embodiment, the packaging unit 3 is annular and arranged around the outside of the cover plate 1 and the back plate 2, and the inner side is sealed with the cover plate 1 and the back plate 2 by a sealing material 4. The packaging unit 3 is connected to the cover plate 1 and the back plate 2 by a sealing connection method of the sealing material 4 to ensure its packaging performance. In the fusion packaging structure for packaging perovskite cells in this embodiment, the packaging unit 3 is sealed and connected to the outside of the cover plate 1 and the back plate 2. Under the premise of ensuring the sealing safety of the battery, compared with the above embodiment, although the overall length of the fusion packaging structure for packaging perovskite cells is increased, after the structure of the cover plate 1, the battery cell 5 and the back plate 2 has been assembled, by coating the sealing material 4 on the outside and correspondingly arranging the packaging unit 3, it meets the fusion packaging needs of battery cells 5 of multiple sizes and battery cells 5 of different processes.

[0040] Based on the above embodiment, the sealing material 4 arranged between the packaging unit 3 and the cover plate 1 is a surface-type sealing material 4 covering the outer side of the cover plate 1, and the sealing material 4 arranged between the packaging unit 3 and the back plate 2 is a surface-type sealing material 4 covering the outer side of the back plate 2. In this embodiment, by coating the surface-type sealing material 4 on the inner contact surfaces of the packaging unit 3 and the cover plate 1 and the back plate 2 (or on the outer contact surfaces of the cover plate 1, the back plate 2 and the packaging unit 3), compared with the above embodiment, although more sealing material 4 is used, it can ensure good overall sealing performance of the welded packaging structure used to encapsulate the perovskite cell.

[0041] In one embodiment of the present invention, the fusion packaging structure for packaging perovskite cells further includes: a column 7, which is supported between the cover plate 1 and the back plate 2 and is separated between two adjacent battery cells 5. Figures 1 to 3 In the structure, the battery cells 5 are all encapsulated in the adhesive film 6 to avoid damage to the battery cells 5. In this embodiment, Figure 4As shown, the adhesive film 6 is replaced with a pillar 7. The pillar 7 is supported between the cover plate 1 and the back plate 2. Its support function prevents atmospheric pressure from squeezing the battery cells 5 encapsulated therein. Therefore, the battery can be encapsulated without the adhesive film 6. Only one pillar 7 is provided between two adjacent battery cells 5 to ensure the safety of each battery cell 5.

[0042] In one embodiment of the present invention, the packaging unit 3 is a glass edge band. In this embodiment, the packaging unit 3 uses glass as the filler, which can not only meet the high-temperature and high-pressure packaging process conditions, but also meet the high-performance water and oxygen barrier capabilities. At the same time, it is close to the performance parameters of the sintered glass paste, reducing stress generation and other adverse factors. After the glass paste is sintered and formed, it is finally necessary to laser weld the contact parts of the glass paste with the cover plate 1 and the back plate 2 to form a connected whole. In addition, the cover plate 1 and the back plate 2 are also made of glass.

[0043] The present invention further provides a battery assembly, which may be a perovskite battery assembly. The battery assembly includes: the fusion packaging structure for packaging the perovskite battery in the above embodiment of the present invention.

[0044] The battery assembly provided by the present invention has the same advantages as above because it includes the fusion packaging structure for packaging perovskite batteries in the above embodiments of the present invention.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fusion packaging structure for packaging perovskite cells, characterized in that: include: A cover plate (1) and a back plate (2) are arranged opposite to each other, and a battery cell (5) is placed between the cover plate (1) and the back plate (2); A packaging unit (3), the packaging unit (3) being arranged around the outside of the battery cell (5) and being sealed and connected to the cover plate (1) and the back plate (2); A column (7), the column (7) is supported between the cover plate (1) and the back plate (2), and is separated between two adjacent battery slices (5).

2. The fusion packaging structure for packaging perovskite cells according to claim 1, characterized in that: The packaging unit (3) is arranged between the cover plate (1) and the back plate (2); a first side surface of the packaging unit (3) is press-fitted with the cover plate (1), and a second side surface of the packaging unit (3) is press-fitted with the back plate (2).

3. The fusion packaging structure for packaging perovskite cells according to claim 2, characterized in that: Strip-shaped sealing materials (4) are respectively arranged on the inner side wall of the packaging unit (3) and close to the first side surface and the second side surface, and strip-shaped sealing materials (4) are respectively arranged on the outer side wall of the packaging unit (3) and close to the first side surface and the second side surface, so that the packaging unit (3) is sealed and connected to the cover plate (1) and the back plate (2).

4. The fusion packaging structure for packaging perovskite cells according to claim 1, characterized in that: The packaging unit (3) is provided between the cover plate (1) and the back plate (2), a sealing material (4) is arranged between a first side surface of the packaging unit (3) and the cover plate (1), and a sealing material (4) is arranged between a second side surface of the packaging unit (3) and the back plate (2).

5. The fusion packaging structure for packaging perovskite cells according to claim 4, characterized in that: The sealing material (4) arranged between the packaging unit (3) and the cover plate (1) is a surface-type sealing material (4) covering the first side surface, and the sealing material (4) arranged between the packaging unit (3) and the back plate (2) is a surface-type sealing material (4) covering the second side surface.

6. The fusion packaging structure for packaging perovskite cells according to claim 1, characterized in that: The packaging unit (3) is arranged on the outside of the cover plate (1) and the back plate (2), and sealing materials (4) are arranged between the inner side surface of the packaging unit (3) and the cover plate (1) and the back plate (2).

7. The fusion packaging structure for packaging perovskite cells according to claim 6, characterized in that: The sealing material (4) arranged between the packaging unit (3) and the cover plate (1) is a surface-type sealing material (4) covering the outer side surface of the cover plate (1), and the sealing material (4) arranged between the packaging unit (3) and the back plate (2) is a surface-type sealing material (4) covering the outer side surface of the back plate (2).

8. The fusion packaging structure for packaging perovskite cells according to any one of claims 1 to 7, characterized in that: The packaging unit (3) is a glass edge sealing strip.

9. A battery assembly, characterized in that: include: The fusion packaging structure for packaging perovskite cells according to any one of claims 1 to 8.

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