Water-soluble-layer-containing thin film battery and electrical equipment
By setting a water-soluble layer on the outside of the thin-film battery and utilizing its water-soluble properties, the problem of difficult leakage detection of existing thin-film batteries is solved, and a simple and reliable leakage detection effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZINERGY SHENZHEN LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-19
AI Technical Summary
Existing methods for detecting leakage in thin-film batteries suffer from problems such as the influence of color developer components on electrolyte performance and loss of color developer color, leading to difficulties in detection.
A ring-shaped water-soluble layer is set on the outside of the thin-film battery structure. Taking advantage of the water-soluble layer's characteristic of dissolving in water, leakage can be detected by observing whether the water-soluble layer dissolves, thus avoiding the reaction between the color developer and the electrolyte.
This technology enables simple and reliable detection of thin-film battery leakage without affecting battery performance, thus improving the feasibility of leakage detection.
Smart Images
Figure CN224264105U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thin-film battery technology, and in particular to a thin-film battery containing a water-soluble layer and an electrical device thereof. Background Technology
[0002] The bonding process of thin-film batteries mainly relies on external pressure devices to bond the upper and lower substrate layers of the thin-film battery to the battery structure using significant pressure. A frame structure is printed around the battery substrate of the battery structure; the adhesive properties of the frame structure ensure effective bonding between the substrate and the battery structure. During the thin-film battery bonding process, a small amount of electrolyte from the battery substrate may seep to the outside of the frame structure, or a few frames may not be tightly bonded, leading to leakage.
[0003] In existing technologies, a common method for leak detection involves adding a color-developing agent to the electrolyte. The color of the agent indicates whether leakage has occurred during the bonding process of the thin-film battery. However, this method has the following drawbacks: ① The color-developing agent increases the amount of non-reactive substances in the electrolyte, leading to a decrease in the electrolyte's ionic conductivity and thus a decline in the performance of the thin-film battery; ② The color-developing agent reacts with the electrolyte components, gradually losing its color and thus its leak detection function. For these reasons, leak detection of thin-film batteries is currently quite difficult.
[0004] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content
[0005] The main objective of this invention is to propose a thin-film battery with a water-soluble layer and an electrical device, aiming to improve the feasibility of detecting leakage in thin-film batteries.
[0006] To achieve the above objectives, this utility model proposes a thin-film battery with a water-soluble layer. The thin-film battery includes a first substrate and a second substrate disposed opposite to each other, and a battery structure is disposed between the first substrate and the second substrate. The battery structure includes a battery substrate and a frame structure surrounding the outside of the battery substrate. Specifically, the thin-film battery includes a first water-soluble layer, which can dissolve when in contact with electrolyte leaking from the battery substrate. The first water-soluble layer has a ring-shaped structure surrounding the outside of the battery structure.
[0007] In one embodiment, the battery substrate includes an electrode layer, and the first water-soluble layer completely covers the electrode layer.
[0008] In one embodiment, the area of the first substrate is less than or equal to the area of the frame structure, and the first water-soluble layer is connected to the second substrate.
[0009] In one embodiment, the first substrate or the second substrate is made of a transparent material, and the first water-soluble layer is disposed between the first substrate and the second substrate.
[0010] In one embodiment, the first water-soluble layer further includes a color developer, wherein the initial color of the color developer is consistent with the color of the first substrate or the second substrate.
[0011] In one embodiment, the first water-soluble layer further includes a fluorescent agent.
[0012] In one embodiment, the first substrate and / or the second substrate is configured as a paper substrate, wherein the paper substrate is covered with a second water-soluble layer on the side facing the battery structure, wherein the second water-soluble layer can dissolve when it comes into contact with the electrolyte leaking from the battery substrate.
[0013] In one embodiment, the second water-soluble layer is a water-soluble paper layer; or, the second water-soluble layer is formed by dripping a water-soluble reagent onto the paper substrate.
[0014] In one embodiment, the first substrate and / or the second substrate include a third water-soluble layer and a hydrophobic layer stacked together, wherein the third water-soluble layer is located on the side of the hydrophobic layer facing away from the battery structure; the third water-soluble layer is removed by water solubilization after the thin-film battery is fabricated.
[0015] To achieve the above objectives, this utility model also proposes an electrical device, which includes the water-soluble thin-film battery described in any of the above claims.
[0016] The technical solution of this utility model involves setting a first water-soluble layer with a ring structure around the outside of the battery structure. Utilizing the characteristic of the water-soluble layer to dissolve upon contact with water, if electrolyte leakage occurs in the battery substrate during the thin-film battery bonding process, the electrolyte will cause the first water-soluble layer to dissolve. By observing whether the first water-soluble layer has dissolved, the inspector can determine whether the thin-film battery is leaking. This process enables leak detection of thin-film batteries without affecting their performance, thereby improving the feasibility of leak detection. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of one embodiment of the thin-film battery provided by this utility model;
[0019] Figure 2 A second schematic diagram of the structure of an embodiment of the thin-film battery provided by this utility model;
[0020] Figure 3 A third schematic diagram of the structure of an embodiment of the thin-film battery provided by this utility model;
[0021] Figure 4 A fourth schematic diagram of the structure of an embodiment of the thin-film battery provided by this utility model;
[0022] Figure 5 Fifth schematic diagram of a thin-film battery embodiment provided by this utility model;
[0023] Figure 6 The sixth schematic diagram shows a structural embodiment of the thin-film battery provided by this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 10. First substrate; 20. Second substrate; 30. Battery structure; 31. Battery substrate; 32. Frame structure; 40. First water-soluble layer; 50. Second water-soluble layer; 60. Third water-soluble layer; 70. Hydrophobic layer;
[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0029] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0030] In existing technologies, a common method for leak detection involves adding a color-developing agent to the electrolyte. The color of the agent indicates whether leakage has occurred during the bonding process of the thin-film battery. However, this method has the following drawbacks: ① The color-developing agent increases the amount of non-reactive substances in the electrolyte, leading to a decrease in the electrolyte's ionic conductivity and thus a decline in the performance of the thin-film battery; ② The color-developing agent reacts with the electrolyte components, gradually losing its color and thus its leak detection function. For these reasons, leak detection of thin-film batteries is currently quite difficult.
[0031] To address the aforementioned technical problems, this invention proposes a thin-film battery containing a water-soluble layer.
[0032] Please see Figures 1 to 2 In one embodiment of the present invention, the thin-film battery includes a first substrate 10 and a second substrate 20 disposed opposite to each other, and a battery structure 30 is disposed between the first substrate 10 and the second substrate 20; wherein the battery structure 30 includes a battery substrate 31 and a frame structure 32 surrounding the outside of the battery substrate 31; specifically, the thin-film battery includes a first water-soluble layer 40, wherein the first water-soluble layer 40 can dissolve when it comes into contact with the electrolyte leaking from the battery substrate 31; the first water-soluble layer 40 has a ring structure surrounding the outside of the battery structure 30.
[0033] The technical solution of this utility model involves a first water-soluble layer 40 with an annular structure surrounding the outer side of the battery structure 30. Utilizing the water-soluble layer's characteristic of dissolving upon contact with water, if electrolyte leakage occurs in the battery substrate 31 during the thin-film battery bonding process, the electrolyte will cause the first water-soluble layer 40 to dissolve. By observing whether the first water-soluble layer 40 has dissolved, the inspector can determine whether the thin-film battery is leaking. This process enables leak detection of the thin-film battery without affecting its performance, thereby improving the feasibility of leak detection.
[0034] refer to Figure 3In the fabrication process of thin-film batteries, since the battery substrate 31 includes an electrode layer containing electrolyte, the first water-soluble layer 40 completely covers the electrode layer. Taking advantage of the water-soluble layer's characteristic of dissolving upon contact with water, the central region of the first water-soluble layer 40 corresponding to the electrode layer is dissolved by the electrolyte, ultimately leaving only the first water-soluble layer 40 in a ring structure. This ring-shaped first water-soluble layer 40 surrounds the outer side of the battery structure 30, ensuring the smooth implementation of the technical solution of this application. At the same time, it simplifies the process of setting the first water-soluble layer 40 in the thin-film battery, which is beneficial to improving manufacturing efficiency.
[0035] As a preferred embodiment of the above embodiments, refer to Figure 4 The area of the first substrate 10 located on the upper side is less than or equal to the area of the frame structure 32, and the first water-soluble layer 40 is connected to the second substrate 20 located on the lower side. This arrangement minimizes the area of the first substrate 10, thereby reducing the manufacturing cost of the thin-film battery. In this case, the first water-soluble layer 40 is only connected to the second substrate 20, using the second substrate 20 as the mounting surface for the first water-soluble layer 40.
[0036] As a preferred embodiment of the above embodiments, the first substrate 10 or the second substrate 20 is made of a transparent material, and the first water-soluble layer 40 is disposed between the first substrate 10 and the second substrate 20. With this configuration, since the first water-soluble layer 40 is disposed between the first substrate 10 and the second substrate 20, this embodiment, by making one of the substrates a transparent material, facilitates the inspection personnel to observe whether the first water-soluble layer 40 comes into contact with the leaked electrolyte and dissolves, thereby improving the convenience of thin-film battery leakage detection.
[0037] As a preferred embodiment, the first water-soluble layer 40 further includes a color developer, wherein the initial color of the color developer is consistent with the color of the first substrate 10 or the second substrate 20. With this configuration, when leaked electrolyte encounters the first water-soluble layer 40 containing the color developer, the first water-soluble layer 40 dissolves; simultaneously, the color developer changes color. Since the initial color of the color developer is consistent with the color of the first substrate 10 or the second substrate 20, the resulting color is inconsistent with the color of the first substrate 10 or the second substrate 20. Therefore, by observing whether the first substrate 10 or the second substrate 20 shows a color change, the operator can determine whether the thin-film battery is leaking. The combination of these two methods further improves the ease of electrolyte leakage detection.
[0038] Furthermore, the first water-soluble layer 40 also includes a fluorescent agent. This configuration, by adding a fluorescent agent to the first water-soluble layer 40, helps to improve the color development of the first water-soluble layer 40, and further facilitates the testing personnel to determine whether the thin-film battery has leaked by observing whether the first water-soluble layer 40 has dissolved.
[0039] As a preferred embodiment of the above embodiments, refer to Figure 5 The first substrate 10 and / or the second substrate 20 are configured as paper substrates. A second water-soluble layer 50 is covered on the side of the paper substrate facing the battery structure 30. The second water-soluble layer 50 can dissolve when it comes into contact with the electrolyte leaking from the battery substrate 31. This embodiment provides a new method for manufacturing the water-soluble layer. In this embodiment, the second water-soluble layer 50 is directly disposed on the surface of the paper substrate facing the battery structure 30. Thus, when electrolyte leaks, the second water-soluble layer 50 dissolves. By observing whether the second water-soluble layer 50 dissolves, the inspector can determine whether the thin-film battery is leaking.
[0040] Furthermore, the second water-soluble layer 50 is a water-soluble paper layer; or, the second water-soluble layer 50 is formed by dripping a water-soluble reagent onto a paper substrate. With this configuration, on the one hand, the second water-soluble layer 50 can be a water-soluble paper layer, such as pre-made glutinous rice paper; on the other hand, the second water-soluble layer 50 can be formed by dripping a water-soluble reagent onto a paper substrate.
[0041] As a preferred embodiment of the above embodiments, refer to Figure 6 The first substrate 10 and / or the second substrate 20 include a third water-soluble layer 60 and a hydrophobic layer 70 stacked together, wherein the third water-soluble layer 60 is located on the side of the hydrophobic layer 70 facing away from the battery structure 30; after the thin-film battery is manufactured, the third water-soluble layer 60 is removed by water solubility. This configuration, utilizing the water-soluble layer's characteristic of dissolving in water, discloses a method for manufacturing an ultra-thin thin-film battery. Specifically, the third water-soluble layer 60 and the hydrophobic layer 70 are first combined to form the first substrate 10 and / or the second substrate 20. Since the substrate is thicker at this point, the probability of deformation during production is greatly reduced, facilitating subsequent bonding processes; after the battery is manufactured, the third water-soluble layer 60 is removed by means of water immersion treatment, leaving only the hydrophobic layer 70 on the first substrate 10 and / or the second substrate 20. This means the thickness of the substrate is thinned, thereby thinning the overall thickness of the thin-film battery, resulting in an ultra-thin thin-film battery.
[0042] This utility model also discloses an electrical device, including a water-soluble thin-film battery of any of the above embodiments. The specific structure of the water-soluble thin-film battery can be referred to the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.
[0043] It should be noted that the other contents of the water-soluble thin-film battery disclosed in this utility model are prior art and will not be described in detail here.
[0044] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.
Claims
1. A water-soluble thin-film battery, the thin-film battery comprising a first substrate and a second substrate disposed opposite to each other, wherein a battery structure is disposed between the first substrate and the second substrate; wherein the battery structure comprises a battery substrate and a frame structure surrounding the outer side of the battery substrate; Its features are, The thin-film battery includes a first water-soluble layer, wherein the first water-soluble layer can dissolve when it comes into contact with the electrolyte leaking from the battery substrate; the first water-soluble layer has a ring structure surrounding the outside of the battery structure.
2. The water-soluble thin-film battery as described in claim 1, characterized in that: The battery substrate includes an electrode layer, and the first water-soluble layer completely covers the electrode layer.
3. The water-soluble thin-film battery as described in claim 1, characterized in that: The area of the first substrate is less than or equal to the area of the frame structure, and the first water-soluble layer is connected to the second substrate.
4. The water-soluble thin-film battery as described in claim 1, characterized in that: The first substrate or the second substrate is made of a transparent material, and the first water-soluble layer is disposed between the first substrate and the second substrate.
5. The water-soluble thin-film battery according to any one of claims 1 to 4, characterized in that: The first water-soluble layer further includes a color developer, wherein the initial color of the color developer is consistent with the color of the first substrate or the second substrate.
6. The water-soluble thin-film battery as described in claim 5, characterized in that: The first water-soluble layer also includes a fluorescent agent.
7. The water-soluble thin-film battery as described in claim 1, characterized in that: The first substrate and / or the second substrate are configured as paper substrates, and the paper substrate is covered with a second water-soluble layer on the side facing the battery structure, wherein the second water-soluble layer can dissolve when it comes into contact with the electrolyte leaking from the battery substrate.
8. The thin-film battery containing a water-soluble layer as described in claim 7, characterized in that: The second water-soluble layer is a water-soluble paper layer; or, the second water-soluble layer is formed by dripping a water-soluble reagent onto the paper substrate.
9. The water-soluble thin-film battery as described in claim 1, characterized in that: The first substrate and / or the second substrate include a third water-soluble layer and a hydrophobic layer stacked together, wherein the third water-soluble layer is located on the side of the hydrophobic layer facing away from the battery structure; the third water-soluble layer is removed by water solubility after the thin-film battery is fabricated.
10. An electrical appliance, characterized in that: The electrical device includes a water-soluble thin-film battery as described in any one of claims 1 to 9.