Paper substrate thin film battery
By adopting a paper substrate and a hydrophobic carbon current collector layer, the environmental protection and production efficiency issues of thin-film batteries have been solved, achieving environmental improvement and simplified production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZINERGY SHENZHEN LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-19
AI Technical Summary
The substrate materials of existing thin-film batteries are mostly non-degradable plastics, resulting in poor environmental performance, and the manufacturing of the tabs relies on die-cutting technology, which affects production efficiency.
Using paper material as the base layer, and through the design of a hydrophobic layer and a carbon current collector layer, the tabs are directly formed, eliminating the die-cutting process, and the battery performance is improved by combining zinc foil material.
It improves the environmental friendliness of thin-film batteries, simplifies the manufacturing process, and enhances production efficiency and battery performance.
Smart Images
Figure CN224264082U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thin-film battery technology, and in particular to a paper-based thin-film battery. Background Technology
[0002] Thin-film batteries are ultra-thin and flexible, capable of being bent or even folded, making them a perfect fit for flexible applications such as wearable devices and electronic tags. Although the electrode materials of thin-film batteries are already very environmentally friendly and renewable, the substrate is still mostly made of non-degradable plastic materials, which is not conducive to sustainable development in terms of waste disposal. Furthermore, in the battery manufacturing process, the penetration of the tabs often relies on die-cutting technology, which requires window processing on the substrate through die-cutting, which is not conducive to improving production efficiency.
[0003] 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
[0004] The main objective of this invention is to propose a paper-based thin-film battery, which aims to further improve the environmental characteristics of thin-film batteries, promote sustainable development, and improve production efficiency.
[0005] To achieve the above objectives, this utility model proposes a paper-based thin-film battery, which includes a substrate layer, a hydrophobic layer, and an electrode layer arranged sequentially; wherein the substrate layer is made of paper material; the electrode layer includes an electroactive material layer and a current collector layer, and the current collector layer is located on the side close to the hydrophobic layer.
[0006] In one embodiment, the current collector layer is configured as a hydrophobic carbon current collector layer, so that the carbon current collector layer serves as the hydrophobic layer; wherein the carbon current collector layer is a printed carbon layer or a composite carbon polymer layer.
[0007] In one embodiment, the carbon current collector layer is the composite carbon polymer layer, and the electroactive material layer is zinc foil.
[0008] In one embodiment, one edge of the current collector layer extends to the outside of the hydrophobic layer and penetrates the substrate layer to form a reverse tab.
[0009] In one embodiment, the thin-film battery further includes a sealant layer disposed at the edge or vacancy of the hydrophobic layer, and the sealant layer penetrates the substrate layer.
[0010] In one embodiment, the thin-film battery is provided with both the reverse tab and the sealant layer.
[0011] In one embodiment, a release paper layer is provided on the side of the substrate layer away from the hydrophobic layer.
[0012] In one embodiment, the substrate layer is provided with double-layer paper; specifically, the substrate layer includes a first sub-sub ...
[0013] In one embodiment, the substrate layer is configured with a double-layer paper structure; specifically, the substrate layer includes a third sub-sub ...
[0014] In one embodiment, an adhesive layer is provided on the side where the third sub-base layer and the fourth sub-base layer are in contact with each other.
[0015] The technical solution of this utility model uses paper material to make the base layer, which is different from the existing technology that uses plastic material as the base layer. The base layer made of paper material can significantly reduce the dependence on plastic material, and is less likely to generate non-degradable substances in the waste disposal of thin-film batteries, thereby improving the environmental protection characteristics of thin-film batteries and promoting sustainable development. Furthermore, by utilizing the property that fluid materials can permeate paper materials, there is no need to perform die-cutting and windowing treatment on the base layer. In other words, the fluid material can directly penetrate the base layer to form the tabs, which can further shorten the manufacturing process of thin-film batteries and thus effectively improve production efficiency. Attached Figure Description
[0016] 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.
[0017] Figure 1 A schematic diagram of one embodiment of the paper-based thin-film battery provided by this utility model;
[0018] Figure 2 A second schematic diagram of a paper-based thin-film battery embodiment provided by this utility model;
[0019] Figure 3 A third schematic diagram of the structure of an embodiment of the paper-based thin-film battery provided by this utility model;
[0020] Figure 4 Fourth schematic diagram of a paper-based thin-film battery embodiment provided by this utility model;
[0021] Figure 5 Fifth schematic diagram of a paper-based thin-film battery embodiment provided by this utility model;
[0022] Figure 6 A schematic diagram of the structure of an embodiment of the paper-based thin-film battery provided by this utility model (Sixth).
[0023] Figure 7 The seventh schematic diagram shows a structural embodiment of the paper-based thin-film battery provided by this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 10. Substrate layer; 11. First sub-substrate layer; 12. Second sub-substrate layer; 13. Third sub-substrate layer; 14. Fourth sub-substrate layer; 20. Hydrophobic layer; 30. Electrode layer; 31. Electroactive material layer; 32. Current collector layer; 40. Reverse tab; 50. Sealant layer; 60. Release paper layer; 70. Adhesive 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] Thin-film batteries are ultra-thin and flexible, capable of being bent or even folded, making them a perfect fit for flexible applications such as wearable devices and electronic tags. Although the electrode materials of thin-film batteries are already very environmentally friendly and renewable, the substrate is still mostly made of non-degradable plastic materials, which is not conducive to sustainable development in terms of waste disposal. Furthermore, in the battery manufacturing process, the penetration of the tabs often relies on die-cutting technology, which requires window processing on the substrate through die-cutting, which is not conducive to improving production efficiency.
[0031] To address the aforementioned technical problems, this utility model proposes a paper-based thin-film battery.
[0032] Please see Figure 1 In one embodiment of the present invention, the thin-film battery includes a substrate layer 10, a hydrophobic layer 20 and an electrode layer 30 arranged sequentially; wherein the substrate layer 10 is made of paper material; the electrode layer 30 includes an electroactive material layer 31 and a current collector layer 32, the current collector layer 32 being located on the side close to the hydrophobic layer 20.
[0033] The technical solution of this utility model uses paper material to make the base layer 10, which is different from the existing technology that uses plastic material as the base layer 10. The base layer 10 made of paper material can significantly reduce the dependence on plastic material, and is less likely to generate non-degradable substances in the waste disposal of thin-film batteries, thereby improving the environmental protection characteristics of thin-film batteries and contributing to sustainable development. Furthermore, by utilizing the property that fluid materials can permeate paper materials, there is no need to perform die-cutting and windowing treatment on the base layer 10. In other words, the fluid material can directly penetrate the base layer 10 to form the tabs, which can further shorten the manufacturing process of thin-film batteries and thus effectively improve production efficiency.
[0034] Meanwhile, a hydrophobic layer 20 is provided between the substrate layer 10 and the electrode layer 30. The hydrophobic layer 20 is used as an isolation layer for the electrolyte in the electrode layer 30 to prevent the electrolyte in the electrode layer 30 from penetrating into the substrate layer 10 and causing electrolyte leakage.
[0035] As a preferred embodiment of the above embodiments, refer to Figure 2 The current collector layer 32 is configured as a hydrophobic carbon current collector layer, so that the carbon current collector layer serves as the hydrophobic layer 20; wherein the carbon current collector layer is a printed carbon layer or a composite carbon polymer layer. With this configuration, since the carbon current collector layer 32, represented by the printed carbon layer or the composite carbon polymer layer, has a certain degree of hydrophobicity, it can be used as the hydrophobic layer 20, thereby replacing the original hydrophobic layer 20, saving on the manufacturing process of the original hydrophobic layer 20, and improving production efficiency.
[0036] Furthermore, the carbon current collector layer is a composite carbon polymer layer, and the electroactive material layer 31 is zinc foil. With this configuration, when a composite carbon polymer layer is used as the carbon current collector layer, the corresponding electroactive material layer 31 should be selected as zinc foil. Since zinc foil has excellent conductivity, the impact of increased battery internal resistance caused by the use of a carbon polymer layer can be reduced.
[0037] As a preferred embodiment of the above embodiments, refer to Figure 3 One edge of the current collector layer 32 extends to the outside of the hydrophobic layer 20 and penetrates the substrate layer 10 to form a reverse tab 40. With this configuration, utilizing the permeability of the substrate layer 10, one edge of the current collector layer 32 extends to the outside of the hydrophobic layer 20. At this point, due to the loss of the hydrophobic layer 20's barrier, the current collector layer 32 comes into contact with the substrate layer 10 and penetrates to the other side of the substrate layer 10. Thus, the current collector layer 32 forms a reverse tab 40 for electrical connection with external electrical equipment.
[0038] Further, refer to Figure 4 The thin-film battery also includes a sealant layer 50, which is disposed at the edge or vacancy of the hydrophobic layer 20 and penetrates the substrate layer 10. This arrangement utilizes the permeability of the substrate layer 10, allowing the sealant layer 50 to contact the substrate layer 10 and penetrate to the other side of the substrate layer 10. This facilitates the adhesion of external electrical devices to the thin-film battery through the adhesive properties of the sealant layer 50.
[0039] It should be noted that the aforementioned reverse tab 40 and sealing layer 50 can be optionally provided or provided simultaneously; this application does not impose specific restrictions on them; as shown in the attached... Figure 5 As shown, when the thin-film battery is provided with both a reverse tab 40 and a sealant layer 50, it can electrically connect the thin-film battery to external electrical equipment through the reverse tab 40 on the one hand, and bond the thin-film battery to the external electrical equipment through the sealant layer 50 on the other hand, which helps to improve the installation efficiency between the thin-film battery and the external electrical equipment.
[0040] Further, refer to Figure 5A release paper layer 60 is provided on the side of the base layer 10 away from the hydrophobic layer 20. This release paper layer 60 is a special paper with anti-stick properties, mainly used to isolate and protect adhesive materials; it is also known as silicone paper or anti-stick paper, achieving its anti-stick function through a silicone oil coating. Considering the adhesive properties of the sealant layer 50, to prevent the sealant or carbon layer from leaking into the machine during printing, and also to prevent the thin-film battery from sticking to non-target objects during storage, a release paper layer 60 is provided on the side of the base layer 10 away from the hydrophobic layer 20. The release paper layer 60 prevents the sealant layer 50 from sticking to non-target objects; the release paper can be peeled off when needed.
[0041] As a preferred embodiment of the above embodiments, refer to Figure 6 The substrate layer 10 is configured with a double-layer paper structure. Specifically, the substrate layer 10 includes a first sub-sub-sub-sub-layer 11 and a second sub-sub-sub-sub-layer 12 stacked together, wherein the first sub-sub-sub-sub-layer 11 and / or the second sub-sub-sub-sub-layer 12 employ a porous substrate structure. This configuration allows for the storage and containment of more electrode material within the porous structure of the first sub-sub-sub-sub-layer 11 or the second sub-sub-sub-sub-layer 12, thereby increasing the capacity of the thin-film battery.
[0042] As a preferred embodiment of the above embodiments, refer to Figure 7 The substrate layer 10 is constructed using a double-layer paper configuration; specifically, the substrate layer 10 includes a third sub-sub ... Figure 7 As shown, the hydrophobic layer 20 penetrates the third sub-subbase layer 13, and a portion of the hydrophobic layer 20 is disposed in the fourth sub-subbase layer 14. The fourth sub-subbase layer 14 adopts a dense substrate structure, and the third sub-subbase layer 13 and the fourth sub-subbase layer 14 are interconnected through the hydrophobic layer 20. This arrangement serves two purposes: firstly, it allows the third sub-subbase layer 13 and the fourth sub-subbase layer 14 to be interconnected through the hydrophobic layer 20, acting as a connection medium between the three sub-subbase layers 13 and 14; secondly, to prevent the hydrophobic layer 20 from penetrating the fourth sub-subbase layer 14 to reach the other side of the substrate layer 10 during printing, this embodiment sets the fourth sub-subbase layer 14 on the side away from the electrode layer 30 as a dense substrate structure, utilizing the insulating properties of the dense substrate structure of the fourth sub-subbase layer 14 to prevent penetration during printing of the hydrophobic layer 20.
[0043] Furthermore, an adhesive layer 70 is provided on the side where the third sub-sub-base layer 13 and the fourth sub-sub-base layer 14 are bonded together. This arrangement allows the third sub-sub-base layer 13 and the fourth sub-sub-base layer 14 to be pre-bonded using the adhesive layer 70, while also preventing penetration during the printing of the hydrophobic layer 20.
[0044] It should be noted that the other contents of the paper-based thin-film battery disclosed in this utility model are prior art and will not be described in detail here.
[0045] 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 paper-based thin film battery, characterized by, The thin-film battery includes a substrate layer, a hydrophobic layer, and an electrode layer arranged sequentially; wherein the substrate layer is made of paper material; the electrode layer includes an electroactive material layer and a current collector layer, wherein the current collector layer is located on the side close to the hydrophobic layer.
2. The paper-based thin film battery of claim 1, wherein: The current collector layer is configured as a hydrophobic carbon current collector layer, so that the carbon current collector layer serves as the hydrophobic layer; wherein the carbon current collector layer is a printed carbon layer or a composite carbon polymer layer.
3. The paper-based thin film battery of claim 2, wherein: The carbon current collector layer is made of the composite carbon polymer layer, and the electroactive material layer is made of zinc foil.
4. The paper-based thin film battery of claim 1, wherein: One edge of the current collector layer extends to the outside of the hydrophobic layer and penetrates the substrate layer to form a reverse tab.
5. The paper-based thin film battery of claim 4, wherein: The thin-film battery further includes a sealant layer, which is disposed at the edge or vacancy of the hydrophobic layer and penetrates the substrate layer.
6. The paper-based thin film battery of claim 5, wherein: The thin-film battery is provided with both the reverse tab and the sealant layer.
7. The paper-based thin film battery of any one of claims 4 to 6, wherein: A release paper layer is provided on the side of the base layer away from the hydrophobic layer.
8. The paper-based thin film battery of claim 1, wherein: The substrate layer is configured with double-layer paper; specifically, the substrate layer includes a first sub-sub ...
9. The paper-based thin film battery of claim 1, wherein: The substrate layer is configured with a double-layer paper structure; specifically, the substrate layer includes a third sub-sub ...
10. The paper-based thin film battery of claim 9, wherein: An adhesive layer is provided on the side where the third sub-base layer and the fourth sub-base layer are attached to each other.