Anti-corrosion conductive coating and battery connecting piece

Abstract

The utility model discloses an anti-corrosion conductive coating and a battery connecting piece, the coating comprises a coating layer, the coating layer comprises a bottom layer, a functional layer and a surface layer which are sequentially arranged along the surface far away from a base material, the bottom layer, the functional layer and the surface layer respectively comprise a conductor, and the bottom layer and the functional layer respectively comprise an insulator; the conductors of the base layer and the conductors of the functional layer are distributed in the insulators of the base layer and the insulators of the functional layer respectively to form planar conductive networks, and the planar conductive network of the base layer and the planar conductive network of the functional layer are connected at the layer interface to form a three-dimensional conductive network. The three-dimensional conductive network is in contact with the substrate and the conductor in the surface layer at a layer interface. The anti-corrosion conductive coating is arranged on the battery connecting piece, so that an obvious anti-corrosion effect can be achieved, good conductive performance of the battery connecting piece can be effectively ensured, a clean and pollution-free production process can be realized, the cost is saved, and the efficiency is high.

Description

[0001] The present application claims priority to Chinese Patent Application No. 202420022817.8, filed on January 4, 2024, entitled "A Corrosion-Resistant Conductive Coating and a Battery Connector". The contents of the aforementioned application are incorporated herein by reference. TECHNICAL FIELD

[0002] The utility model relates to material surface treatment technical field, especially relate to a kind of anticorrosive conductive coating for material surface, surface has the anticorrosive conductive coating of battery connector. BACKGROUND

[0003] With the development of new energy vehicle industry, the demand for vehicle-mounted lithium batteries, fuel cells and the like is becoming more and more vigorous. Battery connectors, as conductive connecting parts used in battery cells, play a very important role.

[0004] Battery connectors are generally made of aluminum. Aluminum has good ductility, small density, high electrical conductivity and other advantages. However, due to the active chemical properties of aluminum, the oxide film formed on its surface alone cannot resist normal environmental corrosion, especially in the case of severe electrochemical corrosion. Therefore, it is necessary to coat the surface of the aluminum material of the battery connector to improve its corrosion resistance while maintaining its original advantages and ensuring its conductivity.

[0005] The main methods for coating the surface of aluminum material for corrosion protection include anodic oxidation, chemical oxidation, micro-arc oxidation, chemical conversion film, thermal spraying, chemical plating and electroplating, but each has certain drawbacks. In particular, the focus of existing treatment methods is usually to improve the corrosion resistance of the material surface, but it cannot achieve good conductivity of the coating at the same time, so it is difficult to apply to the above-mentioned battery connectors and other scenarios that require to ensure conductivity. SUMMARY

[0006] The utility model aims at overcoming the above-mentioned defects in the prior art, and provides a corrosion-resistant conductive coating and a battery connector.

[0007] To achieve the above-mentioned purpose, the technical solutions of the utility model are as follows:

[0008] The utility model provides a kind of corrosion-resistant conductive coating, comprising:

[0009] A coating layer provided on the surface of the substrate;

[0010] The coating layer comprises a primer layer, a functional layer and a surface layer arranged in sequence away from the surface of the substrate, the primer layer, the functional layer and the surface layer each contain a conductor, and the primer layer and the functional layer each further contain an insulator, the conductor of the primer layer and the conductor of the functional layer are each distributed in the insulator of the primer layer and the insulator of the functional layer to form a planar conductive network, and the planar conductive network of the primer layer and the planar conductive network of the functional layer are connected at a layer interface to form a three-dimensional conductive network, which is connected at a layer interface with the conductor in the substrate and the conductor in the surface layer.

[0011] Further, the conductor of the primer layer forms an insulator-free adhesion sublayer at a layer interface with the substrate, and the three-dimensional conductive network is connected at a layer interface with the substrate through the adhesion sublayer.

[0012] Further, the film layer material of the primer layer and the functional layer comprises NiSiAl, NiSiAlN or NiCrSiN.

[0013] Further, at least one of the metal elements and the non-metal elements in the primer layer and the functional layer has a gradually changing content in the direction away from the surface of the substrate, and has a consistent content at the layer interface of the primer layer and the functional layer.

[0014] Further, the functional layer comprises a plurality of functional sublayers, and each of the functional sublayers contains at least one of the metal elements and the non-metal elements, which has a gradually changing content in the direction away from the surface of the substrate, and has a consistent content at the layer interface of each of the functional sublayers.

[0015] Further, the surface layer is a conductive layer formed by a composition conductor containing a metal element or a composition conductor containing an alloy of metal elements.

[0016] Further, the metal elements comprise Ni or Sn.

[0017] The utility model further provides a battery connecting piece, including metal body, and being located on at least one surface of the body as the substrate the above-mentioned anticorrosive conductive coating.

[0018] Further, the body is provided with a first connecting part and a second connecting part connected at a certain angle, the first connecting part is used for connecting with the internal components of the battery cell, the second connecting part is used for connecting with the external conductor of the battery cell, a through hole for passing through the electrode of the battery cell is arranged on the surface of the second connecting part, and the anticorrosive conductive coating PVD coating is arranged on the surface of the second connecting part.

[0019] It can be seen from the technical scheme that the utility model discloses a plating film layer with a primer layer, a functional layer and a surface layer in sequence is formed on the surface of the base material, and a three-dimensional conductive network formed by the conductor distributed in the insulator is formed in the primer layer and the functional layer, the three-dimensional conductive network is connected with the conductor in the base material and the surface layer at the layer interface, so that the anticorrosive conductive coating with good corrosion resistance and conductivity can be formed on the surface of the base material. By arranging the anticorrosive conductive coating of the utility model on the battery connecting piece, not only the obvious anticorrosive effect can be achieved, but also the good conductive performance of the battery connecting piece can be effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure schematic view of an anticorrosive conductive coating of a preferred embodiment of the utility model;

[0021] Figure 2 A structure schematic view of a battery connecting piece of a preferred embodiment of the utility model;

[0022] Figure 3 A Figure 2 A plane structure schematic view of a first connecting part in the battery connecting piece;

[0023] Figure 4 A Figure 2 A plane structure schematic view of a second connecting part in the battery connecting piece. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by the person skilled in the art in the field of the utility model. The similar words such as "include" used in the paper mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and other elements or objects are not excluded.

[0025] The specific embodiments of the utility model will be further described in detail below in combination with the drawings.

[0026] Reference Figure 1 , Figure 1 A structure schematic view of an anticorrosive conductive coating of a preferred embodiment of the utility model. As shown in Figure 1 , an anticorrosive conductive coating of the utility model is arranged on a base material 10 and comprises: a plating film layer arranged on the surface of the base material 10 and having a plurality of stacked film layer structures.

[0027] The film layer includes, in sequence from the surface of the substrate 10, a primer layer 11, a functional layer 13, and a surface layer 12. The primer layer 11, the functional layer 13, and the surface layer 12 each contain a conductor, and the primer layer 11 and the functional layer 13 each further contain an insulator. The conductor of the primer layer 11 is distributed in the insulator of the primer layer 11, forming a planar conductive network. The conductor of the functional layer 13 is distributed in the insulator of the functional layer 13, also forming a planar conductive network. Moreover, the planar conductive network of the primer layer 11 and the planar conductive network of the functional layer 13 meet at the layer interface between the primer layer 11 and the functional layer 13, forming a three-dimensional conductive network. The three-dimensional conductive network is formed by the skeleton of the conductor, and the insulator is filled in the gaps of the conductor skeleton, forming a dense film layer. The first end of the three-dimensional conductive network close to the substrate 10 meets the surface of the substrate 10 at the layer interface between the primer layer 11 and the substrate 10, and the second end of the three-dimensional conductive network away from the substrate 10 meets the conductor in the surface layer 12 at the layer interface between the functional layer 13 and the surface layer 12. Thus, the primer layer 11, the functional layer 13, and the surface layer 12 become conductive layers.

[0028] In some embodiments, the conductor in the primer layer 11 forms an insulator-free adhesion sublayer at the layer interface between the primer layer 11 and the substrate 10 (i.e., the insulator in the primer layer 11 is not distributed at the layer interface between the primer layer 11 and the substrate 10), and the first end of the three-dimensional conductive network meets the substrate 10 at the layer interface through the adhesion sublayer. In this way, the adhesion between the primer layer 11 and the substrate 10 can be improved, while the conductivity of the film layer is also improved.

[0029] In some embodiments, the conductor in the primer layer 11 and the conductor in the functional layer 13 contain at least one of a single element of a metal element and an alloy of a metal element, and at least one of a nitride, a silicide, and a carbide of a metal element. The insulator in the primer layer 11 and the insulator in the functional layer 13 contain at least one of a single element of a non-metal element, a nitride, an oxide, and a carbide of a non-metal element, and an oxide of a metal element. The metal element includes at least one of Al, Cu, Ni, Cr, Zr, and Nb; and the non-metal element includes Si. The use of Si and other non-metal elements, as well as the formed nitride, oxide, and carbide, can improve the corrosion resistance, hardness, and wear resistance of the film layer. For example, the film layer material of the primer layer 11 and the functional layer 13 includes NiSiAl, NiSiAlN, or NiCrSiN.

[0030] In some embodiments, the primer layer 11 and the functional layer 13 each contain at least one same metal element and one same non-metal element, to improve the adhesion between different film layers.

[0031] In some embodiments, at least one of the metallic elements and non-metallic elements in each of the primer layer 11 and the functional layer 13 has a gradient content in a direction away from the surface of the substrate 10, and has a consistent content at the interface of the primer layer 11 and the functional layer 13, so that the conductor skeleton of the three-dimensional conductive network has a gradient radial size. By forming a smooth transition of the element content at the interface, the reduction of the conductive performance caused by the content mutation can be avoided.

[0032] Further, the functional layer 13 includes multiple functional sub-layers, and at least one of the metallic elements and non-metallic elements in each functional sub-layer has a gradient content in a direction away from the surface of the substrate 10, and has a consistent content at the interface of each functional sub-layer. For example, Figure 1 Exemplarily, the functional layer 13 includes two functional sub-layers, which are a first functional sub-layer 15 and a second functional sub-layer 14 arranged in a direction away from the substrate 10.

[0033] In some embodiments, the surface layer 12 is a conductive layer formed by a conductor formed by a composition containing a metallic element or a conductor formed by a composition containing an alloy of a metallic element, which can further reduce the contact resistance. The metallic element in the surface layer 12 includes Ni or Sn. For example, the surface layer 12 can be a conductive layer formed by a conductor formed by a composition containing Ni or Sn. The surface layer 12 can also be a conductive layer formed by a conductor formed by a composition containing a NiCr alloy.

[0034] In some embodiments, the substrate 10 is a metal material. For example, the substrate 10 can be copper, aluminum or steel.

[0035] In some embodiments, the substrate 10 can have a flat surface, a curved surface or a turning surface for forming the above-mentioned corrosion-resistant conductive coating. Further, the surface of the substrate 10 for coating the corrosion-resistant conductive coating can have a blind hole or a through hole, and the corrosion-resistant conductive coating can be coated on the hole wall of the blind hole or the through hole.

[0036] Reference Figure 2 , Figure 2 A structure diagram of a battery connecting piece according to a preferred embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the battery connecting piece according to the present application includes a metal body 20, for example, a copper or aluminum body 20, and a corrosion-resistant conductive coating of the present application arranged on at least one surface of the body 20 as a substrate 10. Figure 2

[0037] In some embodiments, the body 20 is provided with a first connecting part 22 and a second connecting part 21 connected at a certain angle, for example, the first connecting part 22 and the second connecting part 21 can be connected at a right angle, as shown in FIG. 2. Figure 2 Figure 3 ​​The planar structure of the first connecting part 22 is shown, Figure 4 The planar structure of the second connecting part 21 is shown.

[0038] The first connecting part 22 and the second connecting part 21 can be rectangular sheets, and the length of the first connecting part 22 is greater than the length of the second connecting part 21. The first connecting part 22 is used to be connected with the internal components of the battery cell, and the second connecting part 21 is used to be connected with the external conductors of the battery cell. The surface of the second connecting part 21 is provided with a through hole 23 for passing through the electrode of the battery cell, and the anticorrosive conductive coating is at least PVD coated on the surface of the second connecting part 21, including the side wall of the through hole 23 and the inner wall of the annular groove 24 around the through hole 23. By providing the anticorrosive conductive coating on the battery connecting piece, not only the obvious anticorrosive effect can be achieved, but also the good conductive performance of the battery connecting piece can be effectively ensured.

[0039] The preparation method of the anticorrosive conductive coating of the utility model will be further described in detail below by means of specific embodiments and in combination with the drawings.

[0040] For example, the surface of the battery connecting piece shown in the drawings is coated with the coating layer shown in the drawings. Figure 2 For example, the surface of the battery connecting piece shown in the drawings is coated with the coating layer shown in the drawings. Figure 1 The preparation method of the anticorrosive conductive coating of the utility model is as follows:

[0041] Firstly, the battery connecting piece (product to be coated) as the coating substrate 10 is hung on the clamp of the coating rotating frame, and the rotating frame loaded with the battery connecting piece is installed in the process cavity of the PVD coating equipment. The PVD coating equipment can be used in a manner including but not limited to magnetron sputtering, multi-arc ion plating, evaporation, filtered cathode vacuum arc, PECVD and the like.

[0042] The coating process is as follows: incoming inspection-cleaning-hanging-PVD-hanging-out inspection-delivery.

[0043] In the process cavity, the battery connecting piece is first ion cleaned with a gas containing argon, oxygen, hydrogen and the like.

[0044] Then, the temperature in the process cavity is controlled in the range of 50-300℃, and the target material power is controlled in the range of 3-50kw (preferably 10-25kw). Multiple PVD coating is adopted to form the coating layer including the primer layer 11, the functional layer 13 (the first layer functional sub-layer 15 and the second layer functional sub-layer 14) and the surface layer 12 on the surface of the battery connecting piece (for example, the surface of the second connecting part 21) in sequence.

[0045] The content of each film layer element in the base layer 11, the functional layer 13 and the surface layer 12 is controlled by controlling the power of different element targets and the flow of process gas during the coating process, so as to form conductors in the base layer 11, the functional layer 13 and the surface layer 12 respectively, and form insulators in the base layer 11 and the functional layer 13 respectively, and make the conductors of the base layer 11 and the conductors of the functional layer 13 respectively distributed in the insulators of the base layer 11 and the insulators of the functional layer 13 to form planar conductive networks respectively, and make the planar conductive network of the base layer 11 and the planar conductive network of the functional layer 13 meet at the layer interface to form a three-dimensional conductive network, and make the three-dimensional conductive network meet the battery connecting piece at the layer interface, and make the three-dimensional conductive network meet the conductor in the surface layer 12 at the layer interface.

[0046] In some embodiments, when forming the base layer 11, first, the power of the metal element target is turned on, the power of the non-metal element target is turned off, and the process gas is stopped, so as to form an adhesion sublayer formed by the conductor without the insulator on the surface of the battery connecting piece, then the power of the metal element target and the power of the non-metal element target are turned on, and the process gas is turned on, so as to further form the planar conductive network distributed in the insulator of the base layer 11 and meeting the adhesion sublayer on the adhesion sublayer; when forming the functional layer 13, the power of the metal element target and the power of the non-metal element target are turned on, and the process gas is turned on, so as to continue to form the planar conductive network distributed in the insulator of the functional layer 13 on the base layer 11, and make the planar conductive network of the functional layer 13 meet the planar conductive network of the base layer 11 at the layer interface to form a three-dimensional conductive network by controlling the power of different targets and the flow of process gas; when forming the surface layer 12, the power of the metal element target is turned on, the power of the non-metal element target is turned off, and the process gas is stopped, so as to form a conductive layer composed of the conductor and make the conductive layer meet the three-dimensional conductive network.

[0047] In some embodiments, the conductors of the base layer 11 and the conductors of the functional layer 13 contain at least one of the elemental substance of the metal element, the alloy of the metal element, and at least one of the nitride, silicide and carbide of the metal element, and the insulators of the base layer 11 and the insulators of the functional layer 13 contain at least one of the elemental substance of the non-metal element, the nitride, oxide and carbide of the non-metal element, and the oxide of the metal element by turning on the power of the metal element target and the power of the non-metal element target and turning on the process gas.

[0048] In some embodiments, the metal element contained in the conductors of the base layer 11 and the conductors of the functional layer 13 includes at least one of Al, Cu, Ni, Cr, Zr and Nb; the non-metal element includes Si, and the process gas includes at least one of nitrogen and oxygen.

[0049] In some embodiments, when forming the three-dimensional conductive network, by changing the power of the metal element target and the non-metal element target, and the process gas flow, at least one of the metal element and the non-metal element contained in the base layer 11 and the functional layer 13 has a gradually changing content in the direction away from the surface of the battery connector, and has a consistent content at the layer interface of the base layer 11 and the functional layer 13, so that the conductor skeleton of the formed three-dimensional conductive network corresponds to a gradually changing radial size.

[0050] In some embodiments, when forming the functional layer 13, two PVD plating processes are used, so that the formed functional layer 13 includes a first layer of functional sub-layer 15 and a second layer of functional sub-layer 14, and by changing the power of the metal element target and the non-metal element target, and the process gas flow, at least one of the metal element and the non-metal element contained in each functional sub-layer has a gradually changing content in the direction away from the surface of the battery connector, and has a consistent content at the layer interface of the first layer of functional sub-layer 15 and the second layer of functional sub-layer 14, so that the conductor skeleton of the three-dimensional conductive network corresponds to a gradually changing radial size in the first layer of functional sub-layer 15 and the second layer of functional sub-layer 14.

[0051] In some embodiments, during the PVD process, the temperature of the process cavity is controlled in the range of 50-300°C, the target power is 3-50 kw (preferably 10-25 kw), and the base layer 11, the first layer of functional sub-layer 15 and the second layer of functional sub-layer 14 and the surface layer 12 are deposited on the surface of the battery connector respectively. Among them, the base layer 11, the first layer of functional sub-layer 15 and the second layer of functional sub-layer 14 can contain Ni, Cr, Al, Cu, Zr, Nb, Si, etc. Single element materials, or mixtures (alloys) thereof, or nitrides of these single element materials / material mixtures, preferably NiSiAl, NiSiAlN, NiCrSiN; the surface layer 12 is mainly composed of a combination of Ni or Sn, as a conductive layer, to further reduce the overall resistance.

[0052] In some embodiments, the primer layer 11 has a thickness of 100-400 nm, preferably 100-300 nm; the first functional sublayer 15 has a thickness of 300-3000 nm, preferably 500-1000 nm; and the second functional sublayer 14 has a thickness of 100-500 nm, preferably 100-300 nm. The proportion of each element (Ni, Cr, Al, Cu, Zr, Nb, Si, etc.) in each layer gradually changes. If the element is a mixture of materials, the proportion of each element in the overall composition is between 5% and 95% (by mass, the same below); if it is in the form of nitride, the amount of nitrogen introduced is between 20 and 500 seem, preferably 50-200 seem, and the proportion is between 5% and 60%, preferably 20%-40%. Designing such a gradual change pattern can increase the adhesion of the film layer and make the film layer less likely to fail. The surface layer 12 is the outermost layer and has a thickness of 50-1000 nm, preferably 100-500 nm. The surface layer 12 mainly comprises a thin conductive layer containing Ni or Sn, which can further reduce the contact resistance. The proportion of Ni or Sn in the surface layer 12 is 50%-95%, preferably 70%-90%.

[0053] The surface layer 12 can also be formed by other conductive metals and their alloys mentioned above. It can also be an alloy of a non-metal such as Si, but generally the proportion of Si in the alloy is between 5% and 40%. If it is insufficient, it will be more difficult to achieve stable process doping, and if it exceeds, it will affect the conductivity of the entire film layer.

[0054] In the preparation of alloy film layers, either commonly used fixed-ratio alloy targets can be selected for preparation, or single-element targets can be used, and different proportions of alloy film layers can be obtained by controlling the power of different element targets. The advantage of this is that when preparing alloy film layers of the same proportion, the element proportion (proportion) is more stable, and the consistency of the composition proportion of each part of the alloy target does not need to be strictly controlled. When preparing alloy film layers of different proportions, new alloy targets do not need to be replaced, and the power of each target can be directly adjusted. The film layer prepared in this way has a higher ionization rate and is more stable. The power of each target is in the range of 3-50 kw (preferably 10-25 kw), the voltage is 300-1000 v, preferably 500-800 v, and the current is 1-50 A, preferably 5-20 A.

[0055] Embodiments

[0056] PVD process 1: the first layer of battery connecting member substrate 10 is 1 series Al, the second layer (primer layer 11) is NiSiAlN, the film thickness is 100 nm, the nitrogen gas amount is 100 sccm, Ni:Si:Al:N = 6:2:2:3, the third layer (first layer functional sub-layer 15) is NiSiAlN, the film thickness is 1000 nm, the nitrogen gas amount is 120 sccm, Ni:Si:Al:N = 4:2:1:5, the fourth layer (second layer functional sub-layer 14) is SiAlN, the film thickness is 100 nm, the nitrogen gas amount is 110 sccm, Si:Al:N = 4:2:4, and the fifth layer (surface layer 12) is a composition containing Ni, and the film thickness is 300 nm.

[0057] PVD process 2: the first layer of substrate 10 is 2 series Al, the second layer is NiAlN, the film thickness is 100 nm, Ni:Al = 3:2, the nitrogen gradual gas amount is 50-100 sccm, the N element gradual range is 20%-30% (mass fraction), the third layer is NiSiAlN, the film thickness is 1000 nm, Ni:Al = 3:2, the nitrogen gradual gas amount is 70-150 sccm, the N element gradual range is 30%-50%, the fourth layer is SiAlN, the film thickness is 100 nm, Si:Al = 3:2, the nitrogen gradual gas amount is 50-120 sccm, the N element gradual range is 30%-40%, and when the gas amount of each layer gradually increases, the adhesion of the film layer can be improved while the hardness is improved, and the fifth layer is a composition containing NiCr, Ni:Cr = 8:2, and the film thickness is 300 nm.

[0058] PVD process 3: the first layer of substrate 10 is Cu, the second layer is NiCrSiN, the film thickness is 100 nm, Ni:Cr:Si = 3:3:7, the nitrogen gradual gas amount is 50-150 sccm, the N element gradual range is 10%-50%, the third layer is NiCrSiN, the film thickness is 1000 nm, Ni:Cr:Si = 3:3:7, the nitrogen gradual gas amount is 20-130 sccm, the N element gradual range is 10%-40%, the fourth layer is NiCrSiN, the film thickness is 100 nm, Ni:Cr:Si = 3:3:7, the nitrogen gradual gas amount is 20-100 sccm, the N element gradual range is 10%-30%, and the fifth layer is a composition containing Sn, and the film thickness is 300 nm.

[0059] PVD process 4: the first layer of substrate 10 is Cu, the second layer is CuZrN, the film thickness is 100 nm, Cu:Zr=3:7, the gradual change of nitrogen gas is 50-150 sccm, the gradual change range of N element is 10%-50%, the third layer is CuZrNbN, the film thickness is 1000 nm, Cu:Zr:Nb=3:3:7, the gradual change of nitrogen gas is 20-130 sccm, the gradual change range of N element is 10%-40%, the fourth layer is ZrNbN, the film thickness is 100 nm, Zr:Nb=3:7, the gradual change of nitrogen gas is 20-100 sccm, the gradual change range of N element is 10%-30%, the fifth layer is NiSi, Ni:Si=8:2, the film thickness is 300 nm.

[0060] The specific performance indicators that the prepared film layer can reach include but are not limited to: neutral salt spray 35℃, can reach 168 hours of continuous salt spray without corrosion, color difference and the like, and the corrosion prevention level reaches more than 9 levels; micro-ohm test product resistance is less than 100 mu omega, and product contact resistance R is less than or equal to 20 mu omega / cm 2 DC200A, 10N.m, good conductivity; the hardness is more than 1000 HV; after bending (bending 60 degrees to the right, then bending 30 degrees to the left, 5 times), no phenomena such as deposition layer peeling, debris peeling and sheet peeling occur; in the crosshatch test, the adhesive tape does not adhere to the film layer, and the adhesion level is less than or equal to 1 level.

[0061] Through the PVD process, a clean and pollution-free production process can be realized, and the cycle can be shortened, and the production capacity is improved. The part plated with the anti-corrosion conductive coating of the utility model has good corrosion resistance, high conductivity, high hardness, and strong bonding force with the substrate 10, and the total film thickness is only nanoscale. Among them, the metal particles with good conductivity are uniformly distributed in the corrosion-resistant non-metallic particles to form a three-dimensional conductive network, forming a thin film that is both corrosion-resistant and conductive.

[0062] Although the embodiments of the utility model are described in detail in the foregoing, it is obvious for those skilled in the art that various modifications and changes can be made to these embodiments. However, it should be understood that such modifications and changes all belong to the scope and spirit of the utility model described in the claims. Moreover, the utility model described herein can have other embodiments, and can be implemented or realized in various ways.

Claims

1. An anticorrosive conductive coating, characterized by, The application relates to a corrosion-resistant conductive coating, which comprises: a coating layer arranged on the surface of a substrate; the coating layer comprises a primer layer, a functional layer and a surface layer arranged in sequence away from the surface of the substrate, the primer layer, the functional layer and the surface layer each contain a conductor, and the primer layer and the functional layer each further contain an insulator, the conductor of the primer layer and the conductor of the functional layer are each distributed in the insulator of the primer layer and the insulator of the functional layer to form a planar conductive network, and the planar conductive network of the primer layer and the planar conductive network of the functional layer are connected at a layer interface to form a three-dimensional conductive network, which is connected to the conductor in the substrate and the conductor in the surface layer at a layer interface.

2. The anticorrosive electrically conductive coating according to claim 1, characterized in that, The conductor of the primer layer forms an insulator-free adhesion sublayer at a layer interface with the substrate, and the three-dimensional conductive network is connected to the substrate at a layer interface through the adhesion sublayer.

3. The corrosion resistant electrically conductive coating of claim 1, wherein, The film layer material of the primer layer and the functional layer comprises NiSiAl, NiSiAlN or NiCrSiN.

4. The corrosion resistant electrically conductive coating of claim 3, wherein, At least one of the metal elements and the non-metal elements in the primer layer and the functional layer has a gradually changing content in the direction away from the surface of the substrate, and has a consistent content at the layer interface of the primer layer and the functional layer.

5. The corrosion resistant electrically conductive coating of claim 4, wherein, The functional layer comprises a plurality of functional sublayers, and at least one of the metal elements and the non-metal elements in each functional sublayer has a gradually changing content in the direction away from the surface of the substrate, and has a consistent content at the layer interface of each functional sublayer.

6. The corrosion resistant electrically conductive coating of claim 1, wherein, The surface layer is a conductive layer formed by a composition conductor containing a metal element or an alloy composition conductor containing a metal element.

7. The corrosion resistant electrically conductive coating of claim 6, wherein, The metal element comprises Ni or Sn.

8. A battery connection, characterized by The application further relates to a metal body, and a corrosion-resistant conductive coating according to any one of claims 1-7 arranged on at least one surface of the body as a substrate.

9. The battery connection of claim 8, wherein, The body is provided with a first connecting part and a second connecting part connected at a certain angle, the first connecting part is used for connecting with an internal component of an electric core, the second connecting part is used for connecting with an external conductor of the electric core, a through hole for passing through an electrode of the electric core is arranged on the surface of the second connecting part, and the corrosion-resistant conductive coating PVD coating is arranged on the surface of the second connecting part.

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