Packaging structure of thin film battery assembly

Abstract

The utility model discloses a packaging structure of a thin film battery assembly. The packaging structure comprises electrified structural glass; the packaging glass is arranged on the electrified structure glass in a stacked mode. Wherein the electrified structure glass is connected with the packaging glass in a clamping manner, so that a packaging structure is formed and used for blocking external water vapor, and local laser welding packaging is performed at the packaging structure, so that a laser sealing area is formed; and the packaging glass is also provided with a through hole, the through hole is used for penetrating through a lead-out wire of a battery loop and an air exhaust hole serving as a packaging structure, and the lead-out wire and the air exhaust hole are sealed. According to the packaging structure of the thin film battery assembly, the electrified structural glass and the packaging glass are integrated in a concave-convex clamping mode and then are subjected to laser local welding packaging, a tight water vapor blocking sealing structure can be formed, the manufacturing process is simple, and industrial production is easy to achieve.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film battery module technical field, concretely relates to a kind of encapsulation structure of thin film battery module. BACKGROUND

[0002] Perovskite thin film battery is not stable in environment, under the single or synergistic influence of water vapor and oxygen for a long time, it is easy to cause the problem that thin film battery appears efficiency attenuation even failure. Therefore, how to prevent water vapor (humidity) and oxygen diffusion in the environment into the inside of thin film battery module is very critical, especially to prevent water vapor from entering perovskite thin film layer, avoid causing water molecules and perovskite chemical reaction, once hydration reaction occurs, it will cause perovskite decomposition (for example CH3NH3PbI3), it is irreversible reaction, once it occurs, it will lead to permanent failure of thin film battery.

[0003] At present, common thin film battery module is mostly in upper and lower glass cover plate structure, encapsulation adhesive film is fused in the middle of module, butyl adhesive is coated at the edge of module, so as to realize the barrier to water vapor, similar to silicon battery module packaging. But because the requirement of perovskite thin film battery to water vapor penetration is higher than that of silicon battery module, therefore, this encapsulation mode of setting butyl adhesive only at the edge of module still cannot guarantee that perovskite thin film battery can continue outdoor work with the accumulation of water vapor penetration, that is, this mode of setting butyl adhesive around module is difficult to meet the water vapor isolation (encapsulation) requirement of perovskite thin film module under long-term outdoor use condition. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in view of the mode of realizing water vapor isolation by setting butyl adhesive around thin film module, it is still difficult to meet the water vapor isolation requirement of perovskite thin film battery module under long-term outdoor use condition, and a kind of encapsulation structure of thin film battery module is designed, the above problems are solved.

[0005] To achieve the above object, the utility model is realized by the following technical scheme:

[0006] The utility model designs a kind of encapsulation structure of thin film battery module, and its characterized in that, the encapsulation structure includes:

[0007] Electric structure glass;

[0008] And encapsulation glass, it is set on the electric structure glass;

[0009] The electrically charged structure glass and the packaging glass form a clamping type connection to form a packaging structure for blocking external water vapor, and local laser welding packaging is performed at the packaging structure to form a laser sealing area.

[0010] Specifically, the packaging structure of the thin film battery module is designed to solve the problem that the perovskite thin film battery module is easily invaded by water vapor, resulting in efficiency attenuation or failure of the module.

[0011] The through hole formed in the packaging glass is used for threading the lead wire of the battery layer circuit (i.e. the positive and negative current lead wire), and also serves as an exhaust hole of the packaging structure.

[0012] Further, a packaging structure of a thin film battery module includes:

[0013] A glass substrate;

[0014] A battery layer is arranged on the glass substrate;

[0015] The battery layer includes a transparent conductive layer, a first transport layer, a perovskite light absorbing layer, a second transport layer, and a metal back electrode arranged in sequence.

[0016] Further, a packaging structure of a thin film battery module includes:

[0017] Further, a packaging structure of a thin film battery module includes:

[0018] Further, the packaging structure of the thin-film battery assembly, wherein the first recess is arranged at a distance of not more than 1.0 mm from the edge of the glass substrate; the first protrusion is arranged at a distance of not more than 1.0 mm from the edge of the packaging glass; and the depth of the first recess is not greater than the height of the first protrusion.

[0019] Further, the packaging structure of the thin-film battery assembly, wherein the height of the first protrusion is not greater than the depth of the first recess.

[0020] Further, the packaging structure of the thin-film battery assembly, wherein a continuous second protrusion is arranged around the periphery of the glass substrate and close to the edge thereof; a continuous second recess is arranged around the periphery of the packaging glass and close to the edge thereof; the second protrusion is inserted into the second recess to form a clamping connection, and local laser welding is performed after the insertion to form the laser sealing area.

[0021] Further, the packaging structure of the thin-film battery assembly, wherein the second protrusion and the second recess have a cross-sectional shape consistent with a rectangular or triangular structure.

[0022] Further, the packaging structure of the thin-film battery assembly, wherein the second recess is arranged at a distance of not more than 1.0 mm from the edge of the glass substrate; the second protrusion is arranged at a distance of not more than 1.0 mm from the edge of the packaging glass; and the depth of the second recess is not greater than the height of the second protrusion.

[0023] Further, the packaging structure of the thin-film battery assembly, wherein the height of the second protrusion is not greater than the depth of the second recess.

[0024] The packaging structure of the thin-film battery assembly has the following beneficial effects:

[0025] (1) The packaging structure of the thin-film battery assembly can form a strict water vapor barrier sealing structure after the electrified structure glass and the packaging glass are integrated through the concave-convex clamping mode and then subjected to local laser welding packaging, and the manufacturing process is simple and easy to realize industrialized production.

[0026] (2) Compared with the welding sealing line type packaging, the laser welding sealing packaging area formed by the local laser welding of the packaging structure of the thin-film battery assembly increases the sealing area, reduces the influence of the pores formed in the bonding process on the battery assembly, and improves the sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and do not represent all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to represent any limitation of the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Figure 1 A schematic diagram of a packaging structure of a thin-film battery module designed for Example 1;

[0029] Figure 2 A structural schematic diagram of a glass substrate in Example 1;

[0030] Figure 3 A schematic diagram of a packaging structure of a thin-film battery module designed for Example 2;

[0031] Figure 4 A schematic diagram of a packaging structure of a thin-film battery module provided for Comparative Example 1.

[0032] Marked in the figure: 1-charged structure glass, 2-packaging glass, 3-laser sealing area, 4-butyl glue, 5-packaging glue film, 10-glass substrate, 11-battery layer, 12-first recess, 13-second protrusion, 21-first protrusion, 22-second recess. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. The description of at least one exemplary embodiment is merely illustrative, and is by no means any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0034] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and do not have to be used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0035] Embodiment 1

[0036] As shown in the utility model discloses a thin film battery module packaging structure, the packaging structure includes: Figures 1-2 The electric structure glass 1 includes: glass substrate 10 and battery layer 11 which is stacked on the glass substrate 10, and the battery layer 11 includes transparent conductive layer, first transport layer, perovskite light absorption layer, second transport layer and metal back electrode which are sequentially stacked, and the transparent conductive layer is stacked on the glass substrate 10;

[0037] And the packaging glass 2 is arranged on the electric structure glass 1;

[0038] Wherein, the first groove 12 is continuously arranged around the periphery of the glass substrate 10 and is not more than 1.0mm away from the edge thereof, and the first groove 12 is arranged on the same side of the glass substrate 10 as the transparent conductive layer;The first protrusion 21 is continuously arranged around the periphery of the packaging glass 2 and is not more than 1.0mm away from the edge thereof;The first protrusion 21 is inserted into the first groove 12 to form a clamping type connection, thereby constituting a packaging structure for blocking external water vapor;At the same time, the first protrusion 21 and the first groove 12 are locally laser welded after being inserted, to form a laser sealing area 3, to further increase the water vapor blocking effect;The packaging glass 2 is also provided with a through hole, and the through hole is used for threading the lead-out wire of the battery loop and as an exhaust hole of the packaging structure, and the lead-out wire is sealed after being sealed.

[0039]

[0040] ​Preferably, the first protrusion 21 in the above embodiment 1 is consistent with the cross-sectional shape of the first groove 12, which presents a rectangular structure; the height of the first protrusion 21 is greater than the depth of the first groove 12, and the difference between the height of the first protrusion 21 and the depth of the first groove 12 is not greater than 0.5 mm.

[0041] Specifically, the charged structure glass 1 and the packaging glass 3 in the embodiment 1 are clamped by the concave-convex structure in an upper-lower alignment manner to form a pre-packaging structure with flush edges, the positive and negative electrode leads in the battery layer are led out through the through hole on the packaging glass 2, then the pre-packaging piece is placed on a platform with a heating function for edge clamping, the edges are tightly fitted, and the clamped part is locally laser welded by using a laser beam on the platform, the glass contact surface after laser welding disappears to form a laser sealing area 3, and the upper and lower glasses (i.e. the glass substrate 11 and the packaging glass 2) are connected into an integrated connecting piece through the first protrusion 21, then the integrated piece is placed in a vacuum cavity for vacuumizing and wire connection processing, and the through hole is sealed with sealing glue to be fully solidified to ensure the sealing performance, thereby forming a packaging structure of a thin-film battery assembly.

[0042] Embodiment 2

[0043] The difference between the embodiment 2 and the embodiment 1 is that the embodiment 2 is provided with a second protrusion 13 on the glass substrate 10, and the second protrusion 13 and the transparent conductive layer are arranged on the same side of the glass substrate 10, a second groove 22 is arranged on the packaging glass 2, and then the second protrusion 13 and the second groove 22 are clamped, as shown in Figure 3 .

[0044] Comparative example 1

[0045] As shown in Figure 4 , the comparative example 1 provides a packaging structure of a thin-film battery assembly, which is achieved by arranging butyl glue 4 around the assembly and arranging packaging glue film 5 between the battery layer and the packaging glass 2 to achieve the water vapor blocking effect, and the rest is the same as the embodiment 1.

[0046] Test:

[0047] The packaging structures of the thin-film battery assemblies of the comparative example 1 and the embodiment 1 are placed in a test environment with a temperature of 25℃ and a humidity of 85%, and a 1000-hour power test is performed, and the results show that the power of the assembly of the comparative example 1 decreases by about 20%, while the power of the assembly of the embodiment 1 decreases by about 8%, and the reason is that the water vapor penetrates into the interior of the assembly of the comparative example 1, resulting in a greater efficiency decay than the embodiment 1, so it can be seen that the packaging structure of the thin-film battery assembly designed in the utility model has a water vapor blocking effect which is significantly better than the packaging effect of the comparative example 1.

[0048] The above is the preferred embodiment of the present application only for the interpretation of the present application, and is not intended to limit the present application. Any obvious changes or changes derived from the technical solutions of the present application are still within the scope of protection of the present application.

Claims

1. A packaging structure of a thin film battery assembly, characterized by comprising: The packaging structure comprises: a charged structure glass (1); and a packaging glass (2) arranged on the charged structure glass (1); wherein the charged structure glass (1) and the packaging glass (2) form a clamping connection to form a packaging structure for blocking external water vapor, and a local laser welding packaging is performed at the packaging structure to form a laser sealing area (3); the packaging glass (2) is further provided with a through hole for passing through the lead-out wire of the battery circuit and as an exhaust hole of the packaging structure, and the lead-out wire is sealed after being passed through.

2. The encapsulation structure of a thin film battery assembly according to claim 1, wherein The charged structure glass (1) comprises: a glass substrate (10); a battery layer (11) arranged on the glass substrate (10); wherein the battery layer (11) comprises a transparent conductive layer, a first transport layer, a perovskite light-absorbing layer, a second transport layer and a metal back electrode arranged in sequence, and the transparent conductive layer is arranged on the glass substrate (10).

3. The encapsulation structure of a thin film battery assembly according to claim 2, wherein A continuous first groove (12) is arranged around the periphery of the glass substrate (10) and close to the edge thereof, and the first groove (12) and the transparent conductive layer are arranged on the same side of the glass substrate (10); a continuous first protrusion (21) is arranged around the periphery of the packaging glass (2) and close to the edge thereof; The first protrusion (21) is inserted into the first groove (12) to form a clamping connection, and a local laser welding packaging is performed after the insertion to form the laser sealing area (3).

4. The encapsulation structure of a thin film battery assembly according to claim 3, wherein The cross-sectional shape of the first protrusion (21) and the first groove (12) is consistent, which presents a rectangular or triangular structure.

5. The encapsulation structure for a thin film battery assembly of claim 3, wherein The first groove (12) is arranged at a distance of not more than 1.0 mm from the edge of the glass substrate (10); the first protrusion (21) is arranged at a distance of not more than 1.0 mm from the edge of the packaging glass (2); and the depth of the first groove (12) is not greater than the height of the first protrusion (21).

6. The encapsulation structure for a thin film battery assembly of claim 5, wherein, The difference between the height of the first protrusion (21) and the depth of the first groove (12) is not greater than 0.5 mm.

7. The encapsulation structure for a thin film battery assembly of claim 2, wherein A continuous second protrusion (13) is arranged around the periphery of the glass substrate (10) and close to the edge thereof; and a continuous second groove (22) is arranged around the periphery of the packaging glass (2) and close to the edge thereof; The second protrusion (13) is inserted into the second groove (22) to form a clamping connection, and a local laser welding packaging is performed after the insertion to form the laser sealing area (3).

8. The encapsulation structure of a thin film battery assembly according to claim 7, wherein The cross-sectional shape of the second protrusion (13) and the second groove (22) is consistent, which presents a rectangular or triangular structure.

9. The encapsulation structure of a thin film battery assembly according to claim 7, wherein The second protrusion (13) is arranged at a distance of not more than 1.0 mm from the edge of the glass substrate (10); the second groove (22) is arranged at a distance of not more than 1.0 mm from the edge of the packaging glass (2); and the depth of the second groove (22) is not greater than the height of the second protrusion (13).

10. The encapsulation structure for a thin film battery assembly of claim 9, wherein, The difference between the height of the second protrusion (13) and the depth of the second groove (22) is not greater than 0.5 mm.

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