Carbon-based composite conducting bar and processing method thereof

Abstract

The invention discloses a carbon-based composite conducting bar and a processing method thereof, and relates to the field of conducting bars, the carbon-based composite conducting bar comprises a composite bar main body, and the composite bar main body comprises a metal layer, a graphite layer and a carbon fiber layer; the metal layer is arranged outside the graphite layer; the carbon fiber layer is arranged between the metal layer and the graphite layer, or the carbon fiber layer is arranged in the graphite layer. The processing method comprises the following steps: arranging the metal layer on the outer side of the graphite layer, and arranging the carbon fiber layer between the metal layer and the graphite layer or arranging the carbon fiber layer in the graphite layer; and connecting the metal layer, the graphite layer and the carbon fiber layer into an integral structure. According to the embodiment of the invention, on the premise of meeting conductivity, the requirements of high strength, high temperature resistance, high tensile strength and the like can be met, and meanwhile, the weight is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of busbar technology, and in particular to a carbon-based composite busbar and its processing method. Background Technology

[0002] A busbar is a metallic conductor used for efficiently transmitting large currents. It is typically made of copper, aluminum, or copper-aluminum composites and is widely used in power systems, new energy sources, and industrial equipment. Carbon fiber has been widely applied in electrical conductivity across various industries, especially in the power transmission of large equipment. Currently, the application of carbon fiber in electrical conductivity mainly involves combining it with metals such as copper or aluminum, or plating copper on the surface of carbon fiber, to create carbon fiber composite core conductors, electromagnetic shielding materials, capacitor electrodes, etc., which can reduce weight and save materials. However, at high temperatures, the different thermal conductivity of carbon fibers and copper rods can generate internal stress, causing the copper rod to deform. Summary of the Invention

[0003] The purpose of this invention is to provide a carbon-based composite conductive bus and its processing method to solve the problems existing in the prior art. While meeting the requirements of conductivity, it can also meet the requirements of high strength, high temperature resistance and high tensile strength, while greatly reducing the weight.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a carbon-based composite conductive busbar, comprising a composite busbar body, wherein the composite busbar body comprises a metal layer, a graphite layer and a carbon fiber layer; the metal layer is disposed outside the graphite layer; the carbon fiber layer is disposed between the metal layer and the graphite layer, or the carbon fiber layer is disposed inside the graphite layer.

[0006] Preferably, the carbon fiber layer wraps around the outside of the graphite layer and is tightly connected to the graphite layer, and the metal layer wraps around the outside of the carbon fiber layer and is tightly connected to the carbon fiber layer; the graphite layer is a solid core layer.

[0007] Preferably, the metal layer is wrapped around the graphite layer and tightly connected to the graphite layer, and the carbon fiber layer is tightly compressed inside the graphite layer.

[0008] Preferably, the composite row body further includes a plurality of reinforcing columns, the two ends of each reinforcing column being fixedly connected to two side walls opposite to the metal layer, and the length direction of each reinforcing column being perpendicular to the length direction of the metal layer.

[0009] Preferably, each of the reinforcing columns is fixedly connected to the two corresponding sidewalls of the metal layer in a non-linear manner.

[0010] Preferably, the inner wall of the metal layer and / or the outer wall of each of the reinforcing columns are provided with a nanoscale rough structure.

[0011] Preferably, each of the reinforcing pillars is a conductive reinforcing pillar.

[0012] Preferably, it further includes two conductive terminals, one of which is fixedly connected to the entire end face of one end of the metal layer, and the other of which is fixedly connected to the entire end face of the other end of the metal layer; each of the conductive terminals is provided with a mounting hole.

[0013] The present invention also provides a method for processing the carbon-based composite conductive busbar, comprising the following steps:

[0014] S1. The metal layer is disposed outside the graphite layer, and the carbon fiber layer is disposed between the metal layer and the graphite layer or inside the graphite layer;

[0015] S2. Connect the metal layer, the graphite layer and the carbon fiber layer into a single structure.

[0016] Preferably, S1 includes: wrapping the carbon fiber layer around the outside of the graphite layer, and placing the graphite layer wrapped with the carbon fiber layer inside the metal layer;

[0017] S2 includes: cold pressing the metal layer, the graphite layer, and the carbon fiber layer to tightly bond the metal layer, the graphite layer, and the carbon fiber layer to form a cold-pressed preform; and processing the cold-pressed preform through a metallurgical bonding process to melt the metal layer and partially penetrate into the fiber layer, thereby connecting the metal layer, the graphite layer, and the carbon fiber layer into an integral structure.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] This invention provides a carbon-based composite conductive busbar and its processing method, comprising a composite busbar body, which includes a metal layer, a graphite layer, and a carbon fiber layer; the metal layer is disposed outside the graphite layer; the carbon fiber layer is disposed between the metal layer and the graphite layer, or disposed within the graphite layer. This invention provides a multi-layered heterogeneous integrated carbon-based composite conductive busbar, wherein the metal layer is used for conductivity; the carbon fiber layer is used to enhance the strength and tensile properties of the conductive busbar, giving it a certain degree of flexibility, allowing it to withstand bending deformation in multiple directions, and facilitating cutting and installation; the graphite layer acts as a filler and support, dispersing external pressure and reducing or avoiding deformation of the conductive busbar at high temperatures due to the difference in thermal conductivity between the carbon fiber layer and the metal layer. Therefore, this invention, while satisfying conductivity requirements, also meets the requirements for high strength, high temperature resistance, and high tensile strength, while significantly reducing weight. Attached Figure Description

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the carbon-based composite conductive bus provided by the present invention;

[0022] Figure 2 A schematic diagram of the bonding interface of the carbon-based composite conductive bus provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the cold-pressed preform corresponding to the carbon-based composite conductive busbar in Example 2;

[0024] Figure 4 This is a schematic diagram of the cold-pressed preform corresponding to the carbon-based composite conductive busbar in Example 3;

[0025] Figure 5 This is a schematic diagram of the tooling structure in Example 4;

[0026] Figure 6 A schematic diagram of the structure of the composite row body provided by the present invention;

[0027] Figure 7 Schematic diagram of the reinforcing column provided by the present invention Figure 1 ;

[0028] Figure 8 Schematic diagram of the reinforcing column provided by the present invention Figure 2 ;

[0029] Figure 9 for Figure 7 Enlarged view of I in the middle;

[0030] Figure 10 An enlarged view of the reinforcing column provided by the present invention;

[0031] Figure 11 A detailed schematic diagram of the conductive terminal provided by the present invention;

[0032] Figure 12 This is a schematic diagram illustrating the working process of the reinforcing column provided by the present invention;

[0033] In the diagram: 100, carbon-based composite conductive busbar; 1, composite busbar body; 101, metal layer; 102, graphite layer; 103, carbon fiber layer; 104, reinforcing column; 2, conductive end; 3, tooling pressure plate; 4, tooling base plate; 5, weld joint. Detailed Implementation

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The purpose of this invention is to provide a carbon-based composite conductive bus and its processing method to solve the problems existing in the prior art. While meeting the requirements of conductivity, it can also meet the requirements of high strength, high temperature resistance and high tensile strength, while greatly reducing the weight.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figures 1-12As shown, this embodiment provides a carbon-based composite conductive busbar 100, including a composite busbar body 1. The composite busbar body 1 includes a metal layer 101, a graphite layer 102, and a carbon fiber layer 103. The metal layer 101 is disposed outside the graphite layer 102; the carbon fiber layer 103 is disposed between the metal layer 101 and the graphite layer 102, or disposed inside the graphite layer 102. This embodiment provides a multi-layer heterogeneous integrated carbon-based composite conductive busbar 100, wherein the metal layer 101 is used for conductivity; the carbon fiber layer 103 is used to enhance the strength, tensile strength, and other properties of the conductive busbar, giving the conductive busbar a certain degree of flexibility, enabling it to withstand bending deformation in multiple directions, and facilitating cutting and installation; the graphite layer 102 serves as a filler and support, dispersing external pressure and reducing or avoiding deformation of the conductive busbar at high temperatures due to the difference in thermal conductivity between the carbon fiber layer 103 and the metal layer 101. Therefore, this embodiment, while satisfying conductivity, also meets the requirements of high strength, high temperature resistance, and high tensile strength, while significantly reducing weight.

[0041] Traditional busbars suffer from current concentration on the surface due to the skin effect. In this embodiment, the metal layer 101 of the carbon-based composite busbar 100 has a significantly reduced thickness compared to traditional busbars. The thickness of the metal layer 101 is limited; preferably, it is 10%-15% of the total thickness of the busbar, and not less than 0.5 mm. Both the inner and outer sides of the metal layer 101 facilitate current flow, avoiding the uneven current distribution common in traditional busbars. Simultaneously, there is less electron scattering between the metal layer 101 and the graphite layer 102 or carbon fiber layer 103, resulting in a more uniform current distribution at the microscopic level.

[0042] In some specific embodiments, a plurality of reinforcing columns 104 are also included. The two ends of each reinforcing column 104 are fixedly connected to two sidewalls opposite to each other in the thickness direction of the metal layer 101. The length direction of each reinforcing column 104 is perpendicular to the length direction of the metal layer 101. The carbon-based composite conductive bus 100 contains graphite and carbon fiber, which has high elasticity. Therefore, a plurality of reinforcing columns 104 are pre-placed within the carbon-based composite conductive bus 100. The reinforcing columns 104 penetrate the graphite layer 102 and the carbon fiber layer 103 in a regular / irregular manner. Metallurgical bonding processes, such as hot-press welding, rolling, and brazing, can be used to weld the reinforcing columns 104 to the metal layer 101 as a whole. The reinforcing columns 104 can provide a certain pulling force to the metal layer 101 and its internal materials in the thickness direction of the conductive bus, reducing or avoiding the expansion of the carbon fibers and promoting a tighter bond between the various composite layers of the conductive bus.

[0043] In some specific embodiments, each reinforcing column 104 is fixedly connected to the two corresponding sidewalls of the metal layer 101 in a non-linear manner. To compensate for the nonlinear expansion of the carbon-based composite conductive busbar 100, the internal reinforcing column 104 in this embodiment is non-linear in shape, forming a spring-like effect to absorb expansion and contraction. During significant temperature rise changes (from -279 to +1050 degrees Celsius), the internal metal layer 101 and the carbon-based structure maintain a constant bonding force. The non-linear shape of the reinforcing column 104 provides sufficient contact surface for thermal and electrical conductivity regardless of contraction or expansion. Specifically, the non-linear shape means that the vertical cross-section of the reinforcing column 104 is not straight; that is, the reinforcing column 104 is curved or arc-shaped in the vertical direction, rather than a vertical column. This structure makes the contact area between the reinforcing column 104 and its adjacent parts (such as the metal layer 101 and graphite layer 102) larger than that of a vertical column, resulting in stronger adhesion. The non-linear shape of the reinforcing column 104 is beneficial for improving thermal and electrical conductivity, which is impossible with a vertical column. Tests show that at 100 A / mm... 2 At current density, the temperature rise of the carbon-based composite busbar 100 in this embodiment is reduced by 42% compared with the traditional structure, and the thermal deformation is reduced by 76%.

[0044] In some specific embodiments, the inner wall of the metal layer 101 and / or the outer wall of each reinforcing column 104 are provided with nanoscale rough structures. Preferably, both the inner wall of the metal layer 101 and the outer wall of each reinforcing column 104 are provided with nanoscale rough structures (1-5000 μm). The nanoscale rough structures can form a micro-bonded layer with the carbon-based matrix. The tiny grooves allow the carbon fibers to be embedded into the metal layer 101 through physical riveting, significantly improving the wettability of the carbon fibers and increasing the interfacial shear strength by 3-5 times or more.

[0045] In some specific embodiments, each reinforcing post 104 is a conductive reinforcing post 104. The reinforcing post 104 is made of metal, preferably copper. The reinforcing post 104 is an intermediate conductive term in the busbar, capable of forming parallel conductive paths, and can reduce the overall resistance by increasing the effective conductive cross-sectional area. Compared to traditional single-layer busbars, this structure can improve the uniformity of current density distribution by more than 30%. Simultaneously, due to the different thermal conductivity of metals, graphite, and carbon fibers, the heat dissipation of each material differs when the busbar is heated. The reinforcing post 104 can then act as a thermal bridge, rapidly transferring surface Joule heat to the graphite layer 102, enabling lateral heat diffusion at the interface between the three materials. Combined with the longitudinal heat conduction of the reinforcing post 104, a three-dimensional heat dissipation channel is formed. Utilizing the difference in thermal expansion coefficients between the reinforcing post 104 and graphite, the elastic deformation of the reinforcing post 104 buffers thermal stress.

[0046] In some specific embodiments, two conductive ends 2 are also included. One conductive end 2 is fixedly connected to the entire end face of one end of the metal layer 101, and the other conductive end 2 is fixedly connected to the entire end face of the other end of the metal layer 101. Each conductive end 2 is provided with a mounting hole. In this embodiment, conductive ends 2 are provided at both ends of the metal layer 101, so that the outer layer of the carbon-based composite conductive busbar 100 is all metal layer 101, and the inner carbon fiber layer 103 and graphite layer 102 have no exposed points.

[0047] It should be noted that the conductive end 2 can be equipped with different numbers, distributions, sizes and shapes of mounting holes according to the actual working conditions, for connection with equipment or other copper busbars.

[0048] In some specific embodiments, the metal layer 101 is a copper layer, the graphite layer 102 is a hard graphite layer or a layer of graphite similar to graphite paper wound or stacked, and the conductive end 2 is made of copper. All exposed parts of the conductive busbar are made of copper, i.e., a carbon-based composite copper busbar, which can be used in electrical environments with high requirements for corrosion resistance, such as for connecting electrical equipment in the chemical industry, marine engineering, and other fields. It should be noted that the material of the metal layer 101 is not limited to copper, and can also be other metal materials such as alloy copper; the materials of the graphite layer 102 and the carbon fiber layer 103 are preferably pure carbon or composite carbon, but are not limited to pure carbon or composite carbon; the material of the reinforcing column 104 is not limited to the same material as the copper layer, and can also be made of metal materials such as carbon steel or stainless steel.

[0049] In some specific embodiments, the reinforcing column 104 can take various forms such as copper nails, tubes, wires, or copper linings.

[0050] The carbon-based composite busbar 100 of this embodiment can be designed in various specifications with different lengths, widths, and thicknesses. The carbon-based composite copper busbar of this embodiment exhibits excellent performance and has the same appearance as traditional copper busbars, making it a viable alternative to ordinary copper busbars. Firstly, in terms of mechanical properties, the carbon-based composite copper busbar possesses high strength, stiffness, and fatigue resistance, primarily due to the high strength and high modulus of carbon fiber and the excellent electrical and thermal conductivity of copper. Furthermore, the combination of carbon fiber and copper significantly improves the material's mechanical properties. Secondly, in terms of electrical properties, the carbon-based composite copper busbar exhibits excellent conductivity, mainly due to the combination of the high conductivity of carbon fiber and the excellent conductivity of the outer copper layer. From a processing perspective, the carbon-based composite copper busbar has good machinability, primarily because both carbon fiber and copper are easily processed materials, and they can be shaped into desired forms through extrusion, drawing, and other methods. Furthermore, advanced hot-pressing molding processes enable precise molding and efficient production of the carbon-based composite copper busbar. In addition to the numerous advantages mentioned above, the carbon-based composite copper busbar also saves copper usage, reduces costs, and improves tensile strength. During the design process, the ratio of carbon fiber to copper can be rationally selected according to the actual application requirements to achieve the best results. The strength of carbon-based composite copper busbars mainly depends on the bonding force between carbon fiber and copper, as well as the interfacial properties.

[0051] The carbon-based composite copper busbar of this embodiment has higher strength, lighter weight, and larger current carrying capacity, and its operating temperature can be reduced by 9%-15% compared to ordinary conductors. Taking graphite as an example, the density of graphite is between 1.209-2.23 g / cm3, while the density of copper is 8.96. Therefore, the carbon-based composite copper busbar is lightweight and very suitable for applications with long connection lengths and low requirements for support structures. Specifically:

[0052] Taking a pure copper busbar with a cross-section of 100mm*10mm and a length of 1000mm as an example, the tensile strength of copper is 200-250MPa. Using a tensile strength of 200MPa as an example, the tensile strength of the pure copper busbar is...

[0053] F = σ * S = 200 MPa * 1 * 10 -3 m 2 =2*10 5 N

[0054] In the carbon-based composite busbar 100, the graphite layer 102 mainly serves as support and conduction, the carbon fiber layer 103 provides mechanical strength, and the copper layer, while conducting electricity, also shares some of the mechanical load. Taking a busbar model with the carbon fiber layer 103 positioned between the metal layer 101 and the graphite layer 102 as an example, if the dimensions remain 100mm*10mm cross-section and 1000mm length, the copper layer thickness is 1mm, and the intermediate graphite layer 102 has dimensions of 97mm*7mm*1000mm, with a 0.5mm thick carbon fiber layer 103 wound between them. Assuming the tensile strength of copper is 200MPa, and the tensile strength of carbon fiber is 1000MPa-4000MPa, and ignoring the very low tensile strength of graphite, the tensile strength of the carbon-based composite busbar 100 is:

[0055] F 总 =σ 铜 *S 铜 +σ 碳 *S 碳 =200*208.274+4000*101.781=43400+41600=448778.8N

[0056] Through the above comparison, the tensile strength of the carbon-based composite conductive busbar 100 at the aforementioned dimensions is 2.2 times that of a pure copper busbar. According to the above calculations, it can be seen that as long as the carbon fiber area is not less than 20% of the copper layer area, the tensile strength of the carbon-based composite conductive busbar 100 is not lower than that of a pure copper busbar of the same specification, and it maintains the linearity of its hot and cold states under both high and low temperatures. Therefore, the carbon-based composite conductive busbar 100 of this embodiment organically combines the compressive strength of graphite with the tensile strength of carbon fiber.

[0057] Example 2

[0058] This embodiment provides a carbon-based composite conductive busbar 100. A carbon fiber layer 103 wraps around and is tightly connected to a graphite layer 102. A metal layer 101 wraps around and is tightly connected to the carbon fiber layer 103. The graphite layer 102 is a solid core layer. The thermal expansion coefficients of graphite and the outer copper layer are mismatched. Due to differences in temperature and added components, their expansion ratios differ by approximately 10-30 times. An intermediate layer is needed to allow for transitional deformation and ensure reliable connection at any interface. In this embodiment, the carbon fiber layer is positioned between the metal layer 101 and the graphite layer 102, providing lubrication in the parallel direction. This adjusts stress distribution, reduces heat generation and deformation of the copper busbar, maintains straightness in both hot and cold states, and prevents delamination of the metal and carbon due to expansion and slippage between copper, aluminum, and carbon after prolonged operation. This design is crucial for high-current or heat-dissipating environments.

[0059] In some specific embodiments, the carbon fiber layer 103 fills the gap between the graphite layer 102 and the metal layer 101, and there are fine grains at the boundary of the three-layer material, which reduces electron scattering and makes the current more uniformly distributed at the micro level.

[0060] In this embodiment, the other structures and connections in the carbon-based composite conductive busbar 100 are the same as in Embodiment 1.

[0061] Example 3

[0062] This embodiment provides a carbon-based composite conductive busbar 100. In some specific embodiments, a metal layer 101 is wrapped around a graphite layer 102 and tightly connected to the graphite layer 102, and a carbon fiber layer 103 is tightly compressed inside the graphite layer 102.

[0063] In this embodiment, the other structures and connections in the carbon-based composite conductive busbar 100 are the same as in Embodiment 1.

[0064] Example 4

[0065] This embodiment provides a carbon-based composite conductive busbar processing method for the carbon-based composite conductive busbar 100 in Embodiment 1, including the following steps: S1, disposing of a metal layer 101 on the outside of a graphite layer 102, and disposing of a carbon fiber layer 103 between the metal layer 101 and the graphite layer 102 or disposing of the carbon fiber layer 103 inside the graphite layer 102; S2, connecting the metal layer 101, the graphite layer 102 and the carbon fiber layer 103 into an integral structure.

[0066] In some specific embodiments, S1 includes: wrapping the carbon fiber layer 103 around the outside of the graphite layer 102, and placing the graphite layer 102 wrapped with the carbon fiber layer 103 inside the metal layer 101; S2 includes: cold-pressing the metal layer 101, the graphite layer 102, and the carbon fiber layer 103 to tightly bond them together and form a cold-pressed preform; processing the cold-pressed preform through a metallurgical bonding process to melt the metal layer 101 and partially penetrate it into the fiber layer, and connecting the metal layer 101, the graphite layer 102, and the carbon fiber layer 103 into an integral structure. In this embodiment, the three layers are compressed tightly using a cold-pressing method. The cold-pressing method is not limited to one type; high pressure is used to tightly bond the three materials without gaps. This process only needs to ensure that the graphite is not damaged; there is no need to be too strict about the density. This step is to compact the carbon fiber layer 103, the graphite layer 102, and the metal layer 101. Excessive pressure should not be used to avoid cracking the copper layer.

[0067] In some specific embodiments, S2 further includes: fabricating a tooling base plate 4 and a tooling pressure plate 3, wherein the tooling base plate 4 and the tooling pressure plate 3 are made of high-temperature resistant materials, such as non-metallic or metallic materials; placing the cold-pressed pre-fabricated carbon-based composite conductive busbar 100 into the tooling base plate 4, and covering it with the tooling pressure plate 3. Metallurgical bonding processes such as diffusion process, continuous hot-press casting process, or hot-press welding process are used to heat the tooling and the conductive busbar placed therein. When the temperature approaches the melting point of metals such as copper but is lower than the melting point of the tooling material, the copper begins to melt and, under the action of gravity, mechanical pressure, and high temperature, penetrates into the carbon fiber layer 103, increasing the bonding strength between the carbon fiber and the copper. The use of a mold ensures the width and thickness dimensions of the product while controlling time, temperature, pressure, and guaranteeing strength. The copper layer, graphite layer 102, and carbon fiber layer 103 are welded together to form a primary composite.

[0068] In some specific embodiments, the method further includes S3: welding conductive ends 2 to both ends of the primary composite, the conductive ends 2 being made of the same material as the metal layer 101. The conductive ends 2 can have mounting holes of different shapes, distributions, diameters, and numbers as needed. The metal layer 101 has openings at both ends along its length, and the conductive ends 2 on both sides are connected to the cross-section of the primary composite, welded to the opening sections (weld joints 5) at both ends of the metal layer 101 to form a single unit, providing some support for the metal layer 101 and simultaneously conducting a uniformly distributed electron flow through the primary composite. The metal layer 101 is the conductive body, and the graphite layer 102 is used for heat conduction, localized conductivity, and current penetration.

[0069] Example 5

[0070] This embodiment provides a carbon-based composite conductive busbar processing method for the carbon-based composite conductive busbar 100 in Embodiment 1, including the following steps: S1, disposing of a metal layer 101 on the outside of a graphite layer 102, and disposing of a carbon fiber layer 103 between the metal layer 101 and the graphite layer 102 or disposing of the carbon fiber layer 103 inside the graphite layer 102; S2, connecting the metal layer 101, the graphite layer 102 and the carbon fiber layer 103 into an integral structure.

[0071] In some specific embodiments, the carbon fiber layer 103 is disposed within the graphite layer 102, and then the graphite layer 102 is placed within the metal layer 101; subsequently, the three-layer structure is cold-pressed and bonded using the same cold pressing process and metallurgical bonding process as in Example 4.

[0072] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A carbon-based composite conductive busbar, characterized in that: The composite array includes a main body comprising a metal layer, a graphite layer, and a carbon fiber layer; the metal layer is disposed outside the graphite layer; the carbon fiber layer is disposed between the metal layer and the graphite layer, or the carbon fiber layer is disposed inside the graphite layer.

2. The carbon-based composite conductive bus according to claim 1, characterized in that: The carbon fiber layer is wrapped around the outside of the graphite layer and is tightly connected to the graphite layer; the metal layer is wrapped around the outside of the carbon fiber layer and is tightly connected to the carbon fiber layer; the graphite layer is a solid core layer.

3. The carbon-based composite conductive busbar according to claim 1, characterized in that: The metal layer is wrapped around the graphite layer and tightly connected to the graphite layer, while the carbon fiber layer is tightly compressed inside the graphite layer.

4. The carbon-based composite conductive bus according to claim 1, characterized in that: The composite row body also includes multiple reinforcing columns, each of which is fixedly connected at both ends to two side walls opposite to the metal layer, and the length direction of each reinforcing column is perpendicular to the length direction of the metal layer.

5. The carbon-based composite conductive busbar according to claim 4, characterized in that: Each of the reinforcing columns is fixedly connected to the two corresponding sidewalls of the metal layer in a non-linear manner.

6. The carbon-based composite conductive bus according to claim 4, characterized in that: The inner wall of the metal layer and / or the outer wall of each of the reinforcing columns are provided with a nanoscale rough structure.

7. The carbon-based composite conductive bus according to claim 4, characterized in that: Each of the reinforcing pillars is a conductive reinforcing pillar.

8. The carbon-based composite conductive bus according to claim 6, characterized in that: It also includes two conductive terminals, one of which is fixedly connected to the entire end face of one end of the metal layer, and the other of which is fixedly connected to the entire end face of the other end of the metal layer; each of the conductive terminals is provided with a mounting hole.

9. A method for processing a carbon-based composite conductive busbar according to any one of claims 1 to 8, characterized in that: Includes the following steps: S1. The metal layer is disposed outside the graphite layer, and the carbon fiber layer is disposed between the metal layer and the graphite layer or inside the graphite layer; S2. Connect the metal layer, the graphite layer and the carbon fiber layer into a single structure.

10. The carbon-based composite conductive busbar processing method according to claim 9, characterized in that: S1 includes: The carbon fiber layer is wrapped around the outside of the graphite layer, and the graphite layer wrapped with the carbon fiber layer is placed inside the metal layer. S2 includes: cold pressing the metal layer, the graphite layer and the carbon fiber layer to tightly bond the metal layer, the graphite layer and the carbon fiber layer to form a cold-pressed preform; The cold-pressed preform is processed using a metallurgical bonding process, which melts the metal layer and partially penetrates into the fiber layer, connecting the metal layer, the graphite layer, and the carbon fiber layer into a single structure.

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