Battery electrode structure with high heat dissipation and chemical resistance

Abstract

An embodiment of the utility model provides a battery electrode structure with high heat dissipation and chemical resistance, which comprises a polymer insulating layer, two metal layers and two first carbon sputtering layers, the two metal layers are respectively positioned on two sides of the polymer insulating layer, and the first carbon sputtering layers are formed on the surfaces of the metal layers in a sputtering manner. By means of the structure, the first carbon sputtering coating layer or the second carbon sputtering coating layer is used for coating the high polymer material, the influence of the corrosion effect can be reduced, an excellent heat conduction path can be provided, the reaction temperature can be effectively reduced, the performance of the battery can be improved, and the service life of the battery can be prolonged.

Description

Technical Field

[0001] The utility model relates to a battery electrode structure, in particular to a battery electrode structure with high heat dissipation and chemical resistance. Background Art

[0002] In the conventional battery liquid, fluorine (F) and water molecules (H 2 O) are included. During the charge and discharge process, water molecules may dissociate into hydrogen (H), and form hydrofluoric acid (HF) with fluorine. The above chemical reaction causes the polymer material to be strongly corroded, reducing the battery performance and lifespan, resulting in more frequent battery replacements, and increasing the environmental burden.

[0003] In addition, the core temperature during the reaction of the conventional battery is very high, and it cannot effectively dissipate heat, resulting in a decrease in the charge and discharge efficiency of the battery, and increasing the risk of battery explosion or fire.

[0004] Therefore, in the conventional technology of battery manufacturing, how to reduce the influence of the corrosion of the polymer material and effectively cool the battery during the reaction is a technical problem that urgently needs to be solved at present. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides a battery electrode structure with high heat dissipation and chemical resistance, which has anti-corrosion characteristics and can effectively cool down during battery reaction.

[0006] To achieve the above object, an embodiment of the utility model provides a battery electrode structure with high heat dissipation and chemical resistance, which includes a polymer insulating layer, two metal layers, and two first carbon sputtering coatings. The metal layers are respectively located on both sides of the polymer insulating layer, and the first carbon sputtering coatings are formed on the surfaces of the metal layers by sputtering.

[0007] In another embodiment of the utility model, a second carbon sputtering coating is respectively sputtered on the surface of the metal layer on the side different from the sputtering of the first carbon sputtering coating.

[0008] In another embodiment of the utility model, the thickness of the metal layer is between 0.1 micrometer and 5 micrometers.

[0009] In another embodiment of the utility model, the first carbon sputtering coating or the second carbon sputtering coating is carbon or graphite, and the metal layers are of the same material, selected from any one of aluminum metal, copper metal, and copper-nickel alloy.

[0010] To achieve the above object, another embodiment of the present utility model provides a battery electrode structure with high heat dissipation and chemical resistance, which includes a polymer insulating layer, a positive electrode, a separator, and a negative electrode. The positive electrode and the negative electrode are respectively disposed on two side surfaces of the polymer insulating layer; the positive electrode includes a first carbon sputtering layer, a first metal layer, and an active material layer which are sequentially stacked. The first carbon sputtering layer is formed on the surface of the first metal layer by sputtering, and the thickness of the active material layer is between 5 microns and 180 microns; the separator is formed on the side of the active material layer different from the side bonded to the first metal layer, and the thickness of the separator is between 10 microns and 40 microns; the negative electrode includes a second carbon sputtering layer, a second metal layer, and a conductive layer which are sequentially stacked. The second carbon sputtering layer is formed on the surface of the second metal layer by sputtering, and the thickness of the conductive layer is between 5 microns and 166 microns.

[0011] To achieve the above object, another embodiment of the present utility model provides a battery electrode structure with high heat dissipation and chemical resistance, which includes a polymer insulating layer, a positive electrode, a separator, and a negative electrode. The positive electrode and the negative electrode are respectively disposed on two side surfaces of the polymer insulating layer; the positive electrode includes two first carbon sputtering layers, a first metal layer, and an active material layer. Each first carbon sputtering layer is formed on the two side surfaces of the first metal layer by sputtering, and the thickness of the active material layer is between 5 microns and 180 microns; the separator is formed on the side of the active material layer different from the side bonded to the first carbon sputtering layer, and the thickness of the separator is between 10 microns and 40 microns; the negative electrode includes two second carbon sputtering layers, a second metal layer, and a conductive layer. Each second carbon sputtering layer is formed on the two side surfaces of the second metal layer by sputtering, and the thickness of the conductive layer is between 5 microns and 166 microns.

[0012] In another embodiment of the present utility model, the thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.005 microns and 5 microns.

[0013] In another embodiment of the present utility model, the thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.02 microns and 0.05 microns.

[0014] In another embodiment of the present utility model, the thickness of the polymer insulating layer is between 1 micron and 30 microns.

[0015] In another embodiment of the present utility model, the thicknesses of the first metal layer and the second metal layer are both between 0.2 microns and 10 microns.

[0016] In another embodiment of the present utility model, the first carbon sputtering layer or the second carbon sputtering layer is carbon or graphite, the first metal layer is aluminum, the second metal layer is copper, aluminum or copper-nickel alloy, the active material layer contains lithium metal, and the conductive layer is graphite or graphene.

[0017] With the above, by sputtering the first carbon sputtered coating or the second carbon sputtered coating on both side surfaces of the polymer insulating layer, the following effects can be achieved:

[0018] 1. Corrosion resistance: By coating both sides of the polymer insulating layer with the first carbon sputtered coating or the second carbon sputtered coating, the polymer insulating layer is effectively protected, and it can effectively resist the corrosion of hydrofluoric acid (HF) in the battery liquid on the polymer insulating layer, ensuring the durability of the polymer insulating layer and contributing to ensuring the stability and durability of the battery.

[0019] 2. Improving heat dissipation efficiency: The material of the first carbon sputtered coating or the second carbon sputtered coating is carbon (C), which has high thermal conductivity characteristics. It can provide a more excellent heat conduction path, helping to evenly disperse and dissipate the heat generated inside the battery. Moreover, it has chemical resistance and can effectively reduce the reaction temperature during the operation of the battery, improving the efficiency, safety and extending the life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional winding schematic diagram of the battery of the present utility model.

[0021] Figure 2 It is a three-dimensional schematic diagram of the battery of the present utility model.

[0022] Figure 3 It is a schematic cross-sectional view of a single electrode of the first preferred embodiment of the present utility model.

[0023] Figure 4 It is a schematic cross-sectional view of a single electrode of the second preferred embodiment of the present utility model.

[0024] Figure 5 It is a schematic cross-sectional view of the battery of the third preferred embodiment of the present utility model.

[0025] Figure 6 It is a schematic cross-sectional view of the battery of the fourth preferred embodiment of the present utility model.

[0026] Reference numerals:

[0027] Polymer insulating layer 10; Metal layer 11;

[0028] Positive electrode 20; First metal layer 21;

[0029] First carbon sputtered coating 22; Active material layer 23;

[0030] Separator 30; Negative electrode 40;

[0031] Second metal layer 41; Second carbon sputtered coating 42;

[0032] Conductive layer 43; Battery 50. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Exemplary embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It is not intended to limit the technical principles of the present utility model to the specifically disclosed embodiments, and the scope of the present utility model is only limited by the scope of the patent application, covering alternatives, modifications, and equivalents.

[0034] Please refer to Figures 1 to 3 , Figure 3 The planar structure of Figure 1 and Figure 2 is a schematic diagram of a single electrode of a battery 50 as shown in Figure 1 and Figure 2 which is only one embodiment of the battery 50, and the stacked structure of the battery 50 can be in various styles. In Figure 3 , a single electrode structure of a battery 50 with high heat dissipation and chemical resistance is disclosed in the first preferred embodiment of the present utility model, which includes a polymer insulating layer 10, two metal layers 11, and two first carbon sputtering coatings 22. The metal layers 11 are respectively located on both sides of the polymer insulating layer 10, and the first carbon sputtering coatings 22 are formed on the surfaces of the metal layers 11 by sputtering.

[0035] Please refer to Figure 4 and in conjunction with Figure 1 and Figure 2 , a second carbon sputtering coating 42 is sputtered on the surface of each metal layer 11 on the side different from the sputtered first carbon sputtering coating 22 in the second preferred embodiment of the present utility model.

[0036] Please refer to Figure 5 and in conjunction with Figure 1 and Figure 2, the third preferred embodiment of the present utility model discloses a battery 50 electrode structure with high heat dissipation and chemical resistance, which is used for a wound battery 50 structure. This embodiment includes a polymer insulating layer 10, a positive electrode 20, a separator 30, and a negative electrode 40. The positive electrode 20 and the negative electrode 40 are respectively disposed on two side surfaces of the polymer insulating layer 10; the positive electrode 20 includes a first carbon sputtering layer 22, a first metal layer 21, and an active material layer 23 which are sequentially stacked. The first carbon sputtering layer 22 is formed on the surface of the first metal layer 21 by sputtering, and the thickness of the active material layer 23 is between 5 microns and 180 microns; the separator 30 is formed on the side of the active material layer 23 different from the side bonded to the first metal layer 21, and the thickness of the separator 30 is between 10 microns and 40 microns; the negative electrode 40 includes a second carbon sputtering layer 42, a second metal layer 41, and a conductive layer 43 which are sequentially stacked. The second carbon sputtering layer 42 is formed on the surface of the second metal layer 41 by sputtering, and the thickness of the conductive layer 43 is between 5 microns and 166 microns. In this embodiment, the material of the first carbon sputtering layer 22 is carbon, and the material of the second carbon sputtering layer 42 is graphite. Although not shown in the figure, the first carbon sputtering layer 22 and the second carbon sputtering layer 42 may also have the same material, for example, both use carbon or both use graphite. In addition, Figure 5 The structures on both sides of the first metal layer 21 of Figure 3 or Figure 4 can also adopt the structural form of

[0037] In the above, the sputtering sequence is that the first carbon sputtering layer 22 sputters the active material layer 23 first, and then the first carbon sputtering layer 22 sputters the first metal layer 21; similarly, the second carbon sputtering layer 42 sputters on the conductive layer 43 first and then sputters the second metal layer 41.

[0038] Please refer to Figure 6 and cooperate with Figure 1 and Figure 2, the fourth preferred embodiment of the present utility model discloses another battery 50 electrode structure with high heat dissipation and chemical resistance, which is used for a wound battery 50 structure. In this embodiment, it includes a polymer insulating layer 10, a positive electrode 20, a separator 30, and a negative electrode 40. The positive electrode 20 and the negative electrode 40 are respectively disposed on both side surfaces of the polymer insulating layer 10; the positive electrode 20 includes two first carbon sputtering layers 22, a first metal layer 21, and an active material layer 23. Each first carbon sputtering layer 22 is formed on both side surfaces of the first metal layer 21 by sputtering, and the thickness of the active material layer 23 is between 5 microns and 180 microns; the separator 30 is formed on the side of the active material layer 23 different from the side where the first carbon sputtering layer 22 is combined, and the thickness of the separator 30 is between 10 microns and 40 microns; the negative electrode 40 includes two second carbon sputtering layers 42, a second metal layer 41, and a conductive layer 43. Each second carbon sputtering layer 42 is formed on both side surfaces of the second metal layer 41 by sputtering, and the thickness of the conductive layer 43 is between 5 microns and 166 microns. Additionally, Figure 6 The structure on both sides of the first metal layer 21 can also adopt Figure 3 or Figure 4 The structural form. Therefore, after the battery 50 is wound in this embodiment, the conductive layer 43 of the negative electrode 40 will contact the separator 30 and reach an overlapping structural state. Thereby, in addition to enabling the positive electrode 20 and the negative electrode 40 to achieve electron exchange through the separator 30, the overall storage capacity of the battery 50 is increased without increasing the volume of the battery 50.

[0039] In the above, the polymer insulating layer 10 is made of an insulating material and does not have a plurality of microporous structures. Therefore, ions will not conduct through the electrolyte and penetrate the polymer insulating layer 10 during the charging or discharging process of the battery 50.

[0040] In the above, the separator 30 has a plurality of microporous structures (not shown in the figure) for accommodating the electrolyte, thereby being conductive and having the function of electron exchange.

[0041] In one embodiment, the thickness of the first carbon sputter coating 22 or the second carbon sputter coating 42 is between 0.005 microns and 5 microns. The thickness of the first carbon sputter coating 22 or the second carbon sputter coating 42 can be 0.005, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.095, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, and 5 microns. If the thickness of the first carbon sputter coating 22 or the second carbon sputter coating 42 is greater than 5 microns, the carbon bonds of itself will be tightly connected, resulting in a decrease in the connectivity with other materials, causing vacant bonds in the functional groups, which is not conducive to adhesion.

[0042] In one embodiment, the thickness of the first carbon sputter coating 22 or the second carbon sputter coating 42 is between 0.02 microns and 0.05 microns. The thickness of the first carbon sputter coating 22 or the second carbon sputter coating 42 can be between 0.02, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, 0.027, 0.028, 0.029, 0.03, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.04, 0.041, 0.042, 0.043, 0.044, 0.045, 0.046, 0.047, 0.048, 0.049, and 0.05 microns.

[0043] In one embodiment, the thickness of the polymer insulating layer 10 ranges from 1 micron to 30 microns. The thickness of the polymer insulating layer 10 can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20, 20.5, 21, 21.5, 22, 22.5, 23, 23.5, 24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, and 30 microns, etc. The material of the polymer insulating layer 10 can be polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polycarbonate (PC), or polymethyl methacrylate (PMMA).

[0044] In one embodiment, the thickness of the metal layer 11 ranges from 0.1 micron to 5 microns. The thickness of the metal layer 11 can be 0.1, 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, 2.1, 2.4, 2.7, 3, 3.1, 3.3, 3.6, 3.9, 4.2, 4.5, 4.8, and 5 microns, etc.

[0045] In one embodiment, the thicknesses of both the first metal layer 21 and the second metal layer 41 range from 0.2 micron to 10 microns. The thicknesses of the first metal layer 21 and the second metal layer 41 can be 0.2, 0.6, 1, 1.4, 1.8, 2.2, 2.6, 3, 3.4, 3.8, 4.2, 4.6, 5, 5.4, 5.8, 6.2, 6.6, 7, 7.4, 7.8, 8.2, 8.6, 9, 9.4, 9.8, and 10 microns, etc.

[0046] In one embodiment, the metal layer 11, the first metal layer 21, or the second metal layer 41 can be aluminum, copper, or a copper-nickel alloy, etc.

[0047] In one embodiment, the first carbon sputtering layer 22 or the second carbon sputtering layer 42 is carbon or graphite, the first metal layer 21 is aluminum, the second metal layer 41 is copper, aluminum, or a copper-nickel alloy, the active material layer 23 contains lithium metal, and the conductive layer 43 is graphite or graphene.

[0048] In one of the embodiments, the sputtering method of the first carbon sputtered coating 22 or the second carbon sputtered coating 42 is physical vapor deposition (PVD), plasma-enhanced chemical vapor deposition (PECVD), evaporation deposition, or chemical vapor deposition (CVD).

[0049] With the above structure, the advantages of the present utility model are as follows:

[0050] 1. Corrosion resistance: By coating both sides of the polymer insulating layer 10 with the first carbon sputtered coating 22 or the second carbon sputtered coating 42, the polymer insulating layer 10 is effectively protected, and can effectively resist the corrosion of hydrofluoric acid (HF) in the battery liquid to the polymer insulating layer 10, ensuring the durability of the polymer insulating layer 10, and contributing to ensuring the stability and durability of the battery 50.

[0051] 2. Improving heat dissipation efficiency: The material of the first carbon sputtered coating 22 or the second carbon sputtered coating 42 is carbon (C), which has high thermal conductivity characteristics, can provide a more superior heat conduction path, helps to evenly disperse and dissipate the heat generated inside the battery 50, and effectively reduces the reaction temperature during the operation of the battery 50, improving the efficiency, safety and extending the life of the battery 50.

[0052] 3. Improving material adhesion: Through the application of sputtering the first carbon sputtered coating 22 or the second carbon sputtered coating 42, the adhesion of subsequent materials can be enhanced, especially the connection between the first metal layer 21 and the active material layer 23, or the second metal layer 41 and the conductive layer 43, thereby increasing the stability and durability of the battery 50, and also contributing to improving the energy storage efficiency of the battery 50.

[0053] 4. Saving material costs and reducing thickness: By plating the metal layer 11, the first metal layer 21 or the second metal layer 41 on the surface of the polymer insulating layer 10, the usage amount of the required metal material can be effectively reduced, thereby reducing the process cost. At the same time, such a coating can achieve a thinner thickness, which helps to reduce the overall size of the product.

[0054] 5. Reduce interfacial resistance: By applying the first carbon sputtering layer 22 or the second carbon sputtering layer 42 through sputtering, the interfacial resistance between the first metal layer 21 and the active material layer 23, or between the second metal layer 41 and the conductive layer 43 can be reduced, which helps to improve the efficiency and performance of the battery 50, ensures more efficient energy transfer, and helps to improve the energy storage efficiency of the battery 50. The above active material layer 23 can be ternary lithium. The "ternary" refers to a polymer containing three metal elements of nickel, cobalt, and manganese (or aluminum). Different mixing ratios of the three elements of nickel, cobalt, and manganese (or nickel, cobalt, and aluminum) in the positive electrode 20 material are used to adjust characteristics such as the cost of the battery 50 and the required electrochemical properties.

[0055] 6. Reduce environmental impact: By plating the metal layer 11, the first metal layer 21, or the second metal layer 41 on the surface of the polymer insulating layer 10, the demand for resources such as rare metals can be reduced, thereby reducing the impact on the environment; at the same time, reducing the metal usage also helps to reduce the waste generated during the manufacturing process.

[0056] 7. Promote the development of industrial applications: By applying the first carbon sputtering layer 22 or the second carbon sputtering layer 42 through sputtering, it will help to promote the development of the industrial application field, especially in the fields of energy storage, electric vehicles, portable electronic devices, etc.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

Claims

1. A battery electrode structure with high heat dissipation and chemical resistance, characterized in that: include: A polymer insulating layer; Two metal layers, respectively located on both sides of the polymer insulating layer; as well as Two first carbon sputtering layers are formed on the surface between the polymer insulating layer and each of the metal layers by sputtering.

2. The battery electrode structure with high heat dissipation and chemical resistance according to claim 1, characterized in that: A second carbon sputtering layer is sputtered on a surface of each metal layer which is different from the surface on which the first carbon sputtering layer is sputtered.

3. The battery electrode structure with high heat dissipation and chemical resistance according to claim 2, characterized in that: The thickness of each of the first carbon sputtering layers or each of the second carbon sputtering layers is between 0.005 micrometers and 5 micrometers.

4. The battery electrode structure with high heat dissipation and chemical resistance according to claim 3, characterized in that: The thickness of each of the first carbon sputtering layers or each of the second carbon sputtering layers is between 0.02 micrometers and 0.05 micrometers.

5. The battery electrode structure with high heat dissipation and chemical resistance according to claim 1, characterized in that: The thickness of the polymer insulating layer is between 1 micron and 30 microns.

6. The battery electrode structure with high heat dissipation and chemical resistance according to claim 1, characterized in that: The thickness of each metal layer is between 0.1 micrometers and 5 micrometers.

7. A battery electrode structure with high heat dissipation and chemical resistance, characterized in that: include: A polymer insulating layer, wherein a positive electrode and a negative electrode are respectively disposed on two sides of the polymer insulating layer; The positive electrode comprises a first carbon sputtering layer, a first metal layer and an active material layer which are sequentially stacked, wherein the first carbon sputtering layer is formed on the surface of the first metal layer by sputtering, and the thickness of the active material layer is between 5 micrometers and 180 micrometers; an isolation film formed on a side of the active material layer different from the side bonded to the first metal layer, the thickness of the isolation film being between 10 microns and 40 microns; and The negative electrode includes a second carbon sputtering layer, a second metal layer and a conductive layer which are sequentially stacked. The second carbon sputtering layer is formed on the surface of the second metal layer by sputtering. The thickness of the conductive layer is between 5 micrometers and 166 micrometers.

8. The battery electrode structure with high heat dissipation and chemical resistance according to claim 7, characterized in that: The thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.005 micrometers and 5 micrometers.

9. The battery electrode structure with high heat dissipation and chemical resistance according to claim 8, characterized in that: The thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.02 micrometers and 0.05 micrometers.

10. The battery electrode structure with high heat dissipation and chemical resistance according to claim 7, characterized in that: The thickness of the polymer insulating layer is between 1 micron and 30 microns.

11. The battery electrode structure with high heat dissipation and chemical resistance according to claim 7, characterized in that: The thickness of the first metal layer and the second metal layer are both between 0.2 micrometers and 10 micrometers.

12. A battery electrode structure with high heat dissipation and chemical resistance, characterized in that: include: A polymer insulating layer, wherein a positive electrode and a negative electrode are respectively disposed on two sides of the polymer insulating layer; The positive electrode comprises two first carbon sputtering layers, a first metal layer and an active material layer, each of the first carbon sputtering layers is formed on both sides of the first metal layer by sputtering, and the thickness of the active material layer is between 5 microns and 180 microns; an isolation film formed on a side of the active material layer different from the side bonded to the first carbon sputtering layer, the isolation film having a thickness ranging from 10 microns to 40 microns; and The negative electrode includes two second carbon sputtering layers, a second metal layer and a conductive layer. Each of the second carbon sputtering layers is formed on both side surfaces of the second metal layer by sputtering. The thickness of the conductive layer is between 5 micrometers and 166 micrometers.

13. The battery electrode structure with high heat dissipation and chemical resistance according to claim 12, characterized in that: The thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.005 micrometers and 5 micrometers.

14. The battery electrode structure with high heat dissipation and chemical resistance according to claim 13, characterized in that: The thickness of the first carbon sputtering layer or the second carbon sputtering layer is between 0.02 micrometers and 0.05 micrometers.

15. The battery electrode structure with high heat dissipation and chemical resistance according to claim 12, characterized in that: The thickness of the polymer insulating layer is between 1 micron and 30 microns.

16. The battery electrode structure with high heat dissipation and chemical resistance according to claim 12, characterized in that: The thickness of the first metal layer and the second metal layer are both between 0.2 micrometers and 10 micrometers.

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