Conductive rod, conductive rod assembly, electrical system, and vehicle

Abstract

A conductive rod, comprising a conductive rod body, wherein the diameter of the conductive rod body satisfies formula (1), wherein δ is the diameter of the conductive rod body, and the unit thereof is mm; L is the length of the conductive rod body, and the unit thereof is mm; E is the elastic modulus of the conductive rod body, and the unit thereof is Gpa; and μ is 0.5 Gpa1 / 4.

Description

Electrically conductive rod, electrically conductive rod assembly, electrical system and vehicle

[0001] This application claims priority to the Chinese patent application No. 202211730874.3 filed on December 30, 2022, and entitled "Electrically conductive rod, electrically conductive rod assembly, electrical system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electrical systems of vehicles, in particular to an electrically conductive rod, an electrically conductive rod assembly having the electrically conductive rod, an electrical system having the electrically conductive rod assembly, and a vehicle having the electrical system. BACKGROUND

[0003] In a vehicle, the two ends of the electrically conductive rod are used to be fixed to different electrical devices to achieve electrical connection of different electrical devices, to provide power distribution and power for vehicle operation.

[0004] During driving, the vehicle needs to pass through different vibration road conditions, and the electrically conductive rod will also vibrate. In the prior art, because the diameter, length and elastic modulus of the electrically conductive rod are not optimally matched, a large stress will appear in the vibrating electrically conductive rod, which will further cause the electrically conductive rod to loosen, deform or even be damaged.

[0005] Therefore, how to achieve the optimal matching of the diameter, length and elastic modulus of the electrically conductive rod is a problem that needs to be solved by those skilled in the art.

[0006] SUMMARY

[0007] In view of the above technical deficiencies, the purpose of the present application is to provide an electrically conductive rod, an electrically conductive rod assembly having the electrically conductive rod, an electrical system having the electrically conductive rod assembly, and a vehicle having the electrical system, which aims to solve the problem that in the prior art, because the diameter, length and elastic modulus of the electrically conductive rod are not optimally matched, a large stress will appear in the vibrating electrically conductive rod.

[0008] To solve the above problem, the present application provides an electrically conductive rod, which comprises an electrically conductive rod body, the diameter of the electrically conductive rod body satisfies: wherein δ is the diameter of the electrically conductive rod body, in mm; L is the length of the electrically conductive rod body, in mm; E is the elastic modulus of the electrically conductive rod body, in Gpa; μ is 0.5Gpa 1 / 4 .

[0009] In summary, the electrically conductive rod provided by the embodiments of the present application comprises an electrically conductive rod body, the diameter of the electrically conductive rod body satisfies: wherein, δ is the diameter of the conductive rod body, L is the length of the conductive rod body, E is the elastic modulus of the conductive rod body, and μ is 0.5 Gpa 1 / 4 Therefore, the above formula makes the ratio of the diameter, length and elastic modulus of the conductive rod reach an optimal range, so that the stress in the vibrating conductive rod is smaller, and the torque attenuation of the fixing component assembly for fixing the conductive rod is also smaller.

[0010] In an example embodiment, the conductive rod further comprises a first transition section, a second transition section, a first connecting section and a second connecting section, the first transition section and the second transition section are respectively connected to opposite ends of the conductive rod body, the first connecting section is connected to one end of the first transition section away from the conductive rod body, and the second connecting section is connected to one end of the second transition section away from the conductive rod body. Wherein, the cross-sectional area of the first transition section is between the cross-sectional area of the first connecting section and the cross-sectional area of the conductive rod body, and the cross-sectional area of the second transition section is between the cross-sectional area of the second connecting section and the cross-sectional area of the conductive rod body.

[0011] In an example embodiment, a first connecting hole is formed in one end of the first connecting section away from the first transition section, and a second connecting hole is formed in one end of the second connecting section away from the second transition section, the first connecting hole is used to fix the first connecting section to an electrical equipment, and the second connecting hole is used to fix the second connecting section to another electrical equipment.

[0012] In an example embodiment, an end surface of the first connecting section away from the first transition section is an arc surface, and an end surface of the second connecting section away from the second transition section is an arc surface.

[0013] In an example embodiment, a first positioning hole is formed in the first connecting section, and a second positioning hole is formed in the second connecting section, the first positioning hole is used to position the first connecting section with an electrical equipment, and the second positioning hole is used to position the second connecting section with another electrical equipment.

[0014] In an example embodiment, the conductive rod body, the first transition section, the second transition section, the first connecting section and the second connecting section are integrally formed.

[0015] In an example embodiment, the conductive rod further comprises a bonding layer and a reinforcing layer, the bonding layer is arranged on the surface of the conductive rod body, the surface of the first transition section, the surface of the second transition section, the surface of the first connecting section and the surface of the second connecting section, and the reinforcing layer is arranged on the outer surface of the bonding layer; the bonding layer is used to bond the conductive rod body and the reinforcing layer, the first transition section and the reinforcing layer, the second transition section and the reinforcing layer, the first connecting section and the reinforcing layer, and the second connecting section and the reinforcing layer.

[0016] In an example embodiment, the first positioning hole and the second positioning hole expose the bonding layer and the reinforcing layer.

[0017] In an example embodiment, the surface roughness of the outer surface of the reinforcing layer is less than or equal to 1.6, and the Vickers hardness of the reinforcing layer is greater than 38.

[0018] In an example embodiment, the conductive rod further comprises an insulating layer, the insulating layer is arranged on part of the circumferential side of the reinforcing layer, and the area where the first connecting hole is located exposes the insulating layer, and the area where the second connecting hole is located exposes the insulating layer.

[0019] In an example embodiment, the conductive rod further comprises a shielding layer, the shielding layer is arranged on the circumferential side of the insulating layer, and the shielding layer is used to shield the magnetic field.

[0020] In an example embodiment, the conductive rod body comprises a plurality of conductive sections and at least one bending section, and at least one of the bending sections and a plurality of the conductive sections are connected in turn and alternately.

[0021] In an example embodiment, the material of the conductive rod comprises magnesium with a mass percentage of 0.02% to 0.85%, silicon with a mass percentage of 0.01% to 0.41%, boron with a mass percentage of 0.01% to 0.04%, iron with a mass percentage of 0.01% to 0.07%, and aluminum with a mass percentage of 98.59% to 99.95%.

[0022] In an example embodiment, the total mass percentage of magnesium, silicon, boron, iron and aluminum is greater than 99.9%.

[0023] In an example embodiment, the material of the conductive rod comprises Al3Fe and AlSiFe.

[0024] In an example embodiment, the Based on the experimental design.

[0025] In an example embodiment, the elastic modulus of the conductive rod body ranges from 55Gpa to 120Gpa.

[0026] Based on the same inventive concept, the application further provides a conductive rod assembly comprising a connecting structure and a plurality of the conductive rod as described above, and the plurality of the conductive rod is fixed to the connecting structure.

[0027] In summary, the conductive rod assembly provided by the embodiments of the application comprises a connecting structure and a conductive rod, the conductive rod comprises a conductive rod body, and the diameter of the conductive rod body satisfies: wherein, δ is the diameter of the conductive rod body, in mm; L is the length of the conductive rod body, in mm; E is the elastic modulus of the conductive rod body, in Gpa; and μ is 0.5 Gpa. 1 / 4 Therefore, the above formula makes the ratio of the diameter, length and elastic modulus of the conductive rod reach an optimal range, so that the stress occurring in the vibrating conductive rod is small, and the torque attenuation of the fixing component assembly fixing the conductive rod is also small, so that the conductive rod meets the long-term vibration working condition, and meanwhile, the conductive rod is prevented from being separated or broken due to vibration in the working process, so as to ensure that the conductive rod assembly formed by the conductive rod is reliable and durable, and further ensure that the vehicle has a large driving mileage on the actual road.

[0028] Based on the same inventive concept, the application further provides an electrical system comprising a plurality of electrical devices and the conductive rod assembly as described above, and the two ends of the conductive rod of the conductive rod assembly are respectively fixed to different electrical devices and are electrically connected.

[0029] In summary, the electrical system provided by the embodiments of the application comprises an electrical device and a conductive rod assembly, the conductive rod assembly comprises a connecting structure and a conductive rod, the conductive rod comprises a conductive rod body, and the diameter of the conductive rod body satisfies: wherein, δ is the diameter of the conductive rod body, in mm; L is the length of the conductive rod body, in mm; E is the elastic modulus of the conductive rod body, in Gpa; and μ is 0.5 Gpa. 1 / 4 Therefore, the above formula makes the ratio of the diameter, length and elastic modulus of the conductive rod reach an optimal range, so that the stress occurring in the vibrating conductive rod is small, and the torque attenuation of the fixing component assembly fixing the conductive rod is also small, so that the conductive rod meets the long-term vibration working condition, and meanwhile, the conductive rod is prevented from being separated or broken due to vibration in the working process, so as to ensure that the conductive rod assembly formed by the conductive rod is reliable and durable, and further ensure that the vehicle has a large driving mileage on the actual road.

[0030] Based on the same inventive concept, the application further provides a vehicle comprising a vehicle body and the electrical system as described above, and the electrical system is located in the vehicle body.

[0031] In summary, the vehicle provided by the embodiment of the application comprises a vehicle body and an electrical system, the electrical system comprises an electrical device and a conductive rod assembly, the conductive rod assembly comprises a connecting structure and a conductive rod, the conductive rod comprises a conductive rod body, and the diameter of the conductive rod body satisfies: wherein, δ is the diameter of the conductive rod body, in mm; L is the length of the conductive rod body, in mm; E is the elastic modulus of the conductive rod body, in Gpa; and μ is 0.5 Gpa 1 / 4 Therefore, the above formula makes the ratio of the diameter, length and elastic modulus of the conductive rod reach an optimal range, so that the stress appearing in the vibrating conductive rod is small, and the torque attenuation of the fixing component of the conductive rod is also small, so that the conductive rod can meet the long-term vibration working condition, and meanwhile, the conductive rod is prevented from being separated or broken due to vibration in the working process, so as to ensure that the conductive rod assembly formed by the conductive rod is reliable and durable, and further ensure that the vehicle has a large driving mileage on the actual road. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0033] Fig. 1 is a top view of a first structure of a conductive rod disclosed by the embodiment of the application;

[0034] Fig. 2 is a front view of the first structure of the conductive rod disclosed by the embodiment of the application;

[0035] Fig. 3 is a stress nephogram of a simulation test of a first test group disclosed by the embodiment of the application;

[0036] Fig. 4 is a stress nephogram of a simulation test of a second test group disclosed by the embodiment of the application;

[0037] Fig. 5 is a stress nephogram of a simulation test of a third test group disclosed by the embodiment of the application;

[0038] Fig. 6 is a stress nephogram of a simulation test of a fourth test group disclosed by the embodiment of the application;

[0039] Fig. 7 is a stress nephogram of a simulation test of a fifth test group disclosed by the embodiment of the application;

[0040] Fig. 8 is a stress nephogram of a simulation test of a sixth test group disclosed by the embodiment of the application;

[0041] Fig. 9 is a top view of a second structure of the conductive rod according to an embodiment of the present application;

[0042] Fig. 10 is a top view of a third structure of the conductive rod according to an embodiment of the present application;

[0043] Fig. 11 is a sectional view of the conductive rod of Fig. 10 along XI-XI direction;

[0044] Fig. 12 is a structural view of a conductive rod assembly according to an embodiment of the present application;

[0045] Fig. 13 is a structural view of an electrical system according to an embodiment of the present application;

[0046] Fig. 14 is a structural view of a vehicle according to an embodiment of the present application.

[0047] Explanation of Reference Numerals:

[0048] 10 - conductive rod body; 11 - conductive section; 13 - bent section; 20 - first transition section; 30 - second transition section; 40 - first connecting section; 41 - first connecting hole; 43 - first positioning hole; 50 - second connecting section; 51 - second connecting hole; 53 - second positioning hole; 70 - bonding layer; 80 - reinforcing layer; 90 - insulating layer; 100 - conductive rod; 100a - conductive rod; 100b - conductive rod; 110 - shielding layer; 200 - connecting structure; 300 - conductive rod assembly; 400 - electrical device; 500 - electrical system; 700 - vehicle body; 800 - vehicle. DETAILED DESCRIPTION

[0049] The exemplary embodiments will be described in detail herein below with reference to the drawings. In the following description, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments are not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0050] The following description of the embodiments is provided as an example to illustrate the present application that can be implemented. The numbers of components described herein, such as "first", "second", etc., are merely used to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" or "coupling" as used herein, unless otherwise specified, includes direct and indirect connections (couplings). The directional terms used in the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are merely the directions with reference to the attached drawings, and thus the directional terms used are for better, clearer illustration and understanding of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "coupling" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include", "may include", "contain" or "may contain" used in the present application represent the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit other one or more functions, operations, elements, etc. In addition, the term "include" or "contain" means the existence of the corresponding features, numbers, steps, operations, elements, components or combinations thereof disclosed in the specification, and does not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof, and is intended to cover non-exclusive inclusion.

[0052] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if it is determined" or "if it is detected (a stated condition or event)" can be interpreted to mean "when it is determined" or "in response to determining" or "when it is detected (a stated condition or event)" or "in response to detecting (a stated condition or event)".

[0053] In the following description, the suffixes such as "module", "part", or "unit" used to represent elements are merely used to facilitate the description of the present application, and do not have a specific meaning by themselves. Therefore, "module", "part", or "unit" can be used interchangeably.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0055] In a vehicle, two ends of a conductive rod are usually used to be fixed to different electrical devices to realize electrical connection between different electrical devices, so as to provide power distribution and power for vehicle operation. During driving, the vehicle often needs to pass through different vibration road conditions, and the conductive rod will also vibrate. In the prior art, because the diameter, length and elastic modulus of the conductive rod are not optimally matched, a large stress will appear in the vibrating conductive rod, which will cause the conductive rod to loosen, deform or even be damaged.

[0056] Therefore, the purpose of the present application is to provide a conductive rod, a conductive rod assembly having the conductive rod, an electrical system having the conductive rod assembly and a vehicle having the electrical system, which aims to solve the problem that in the prior art, because the diameter, length and elastic modulus of the conductive rod are not optimally matched, a large stress will appear in the vibrating conductive rod.

[0057] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a top view of the first structure of the conductive rod disclosed in the embodiment of the present application, and FIG. 2 is a front view of the first structure of the conductive rod disclosed in the embodiment of the present application. The conductive rod 100 provided in the embodiment of the present application comprises a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies the following formula (1):

[0058] Wherein, δ is the diameter of the conductive rod body 10, the unit is mm (millimeter); L is the length of the conductive rod body 10, the unit is mm; E is the elastic modulus of the conductive rod body 10, the unit is Gpa (Giga Pascal); μ is 0.5Gpa 1 / 4 .

[0059] In the embodiment of the present application, the diameter δ of the conductive rod body 10 can be Or other values, which are not specifically limited in the present application.

[0060] In an example embodiment, the electrically conductive rod body 10 has an elastic modulus E in the range of [55 Gpa, 120 Gpa], for example, 55 Gpa, 62 Gpa, 69 Gpa, 73 Gpa, 85 Gpa, 92 Gpa, 100 Gpa, 107 Gpa, 116 Gpa, 120 Gpa, or other values, which are not specifically limited in the present application, due to the material and process forming the electrically conductive rod body 10.

[0061] In an example embodiment, the electrically conductive rod 100 further comprises a first transition section 20, a second transition section 30, a first connecting section 40, and a second connecting section 50. The design of experiments (DOE) can be obtained based on a test. The test design includes orthogonal test design, regression orthogonal test design, and response surface method.

[0062] In an example embodiment, the electrically conductive rod 100 further comprises a first transition section 20, a second transition section 30, a first connecting section 40, and a second connecting section 50. The first transition section 20 and the second transition section 30 are respectively connected to opposite ends of the electrically conductive rod body 10, i.e., the first transition section 20 is connected to one end of the electrically conductive rod body 10, and the second transition section 30 is connected to the opposite end of the electrically conductive rod body 10. The first connecting section 40 is connected to one end of the first transition section 20 facing away from the electrically conductive rod body 10, and the second connecting section 50 is connected to one end of the second transition section 30 facing away from the electrically conductive rod body 10, i.e., the first transition section 20 is connected between the first connecting section 40 and the electrically conductive rod body 10, and the second transition section 30 is connected between the second connecting section 50 and the electrically conductive rod body 10. The first connecting section 40 and the second connecting section 50 are used to connect with different electrical equipment to achieve electrical connection between the electrically conductive rod 100 and different electrical equipment.

[0063] It can be understood that, since the first connecting section 40 is connected with the electrical equipment, the size of the first connecting section 40 is small, i.e. the cross-sectional area of the first connecting section 40 is smaller than the cross-sectional area of the conductive rod body 10. In order to avoid the sudden change of the cross-sectional area of the conductive rod 100 caused by the direct connection of the first connecting section 40 with the conductive rod body 10, which will cause a large stress concentration at the sudden change position of the cross-sectional area, the first transition section 20 is arranged between the conductive rod body 10 and the first connecting section 40, the cross-sectional area of the first transition section 20 is between the cross-sectional area of the first connecting section 40 and the cross-sectional area of the conductive rod body 10, which avoids the sudden change of the cross-sectional area of the conductive rod 100 and reduces the stress concentration at the position of the change of the cross-sectional area. Similarly, the cross-sectional area of the second transition section 30 is between the cross-sectional area of the second connecting section 50 and the cross-sectional area of the conductive rod body 10, and the related effects of the second transition section 30 and the second connecting section 50 are described above and will not be repeated here. The cross-section is a plane perpendicular to the axis of the conductive rod 100.

[0064] In the example embodiment, the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50 can be integrally formed, i.e. the conductive rod 100 can be formed by integrally forming, which is beneficial to improve the installation precision of the conductive rod 100.

[0065] In the example embodiment, the overall shape of the conductive rod body 10 can be cylindrical, and the cross-section thereof is circular. The overall shape of the first transition section 20 and the second transition section 30 can be cylindrical, and the cross-sections thereof are circular. The overall shape of the first connecting section 40 and the second connecting section 50 can be a sheet structure, and the cross-sections thereof are rectangular.

[0066] It can be understood that, in order to facilitate the contact of the first connecting section 40 with the electrical equipment and the contact of the second connecting section 50 with the electrical equipment, the overall shape of the first connecting section 40 and the second connecting section 50 is designed as a sheet structure.

[0067] As shown in FIG. 1 and FIG. 2, in the embodiment of the present application, the first connecting section 40 is provided with a first connecting hole 41 at one end thereof opposite to the first transition section 20, and the second connecting section 50 is provided with a second connecting hole 51 at one end thereof opposite to the second transition section 30. The first connecting section 40 is fixed to the electrical equipment by cooperation of the first connecting hole 41 and a fixing component assembly, and the second connecting section 50 is fixed to the electrical equipment by cooperation of the second connecting hole 51 and the fixing component assembly. It can be understood that the cooperation of the first connecting hole 41 and the fixing component assembly and the cooperation of the second connecting hole 51 and the fixing component assembly facilitate the installation and removal of the conductive rod 100.

[0068] In the example embodiment, the fixing component assembly can include a bolt and a nut.

[0069] In the example embodiment, the end surface of the first connecting section 40 opposite to the first transition section 20 can be an arc surface, and the end surface of the second connecting section 50 opposite to the second transition section 30 can be an arc surface.

[0070] In the example embodiment, the first connecting section 40 is provided with a first positioning hole 43, and the second connecting section 50 is provided with a second positioning hole 53. The first positioning hole 43 facilitates the positioning of the first connecting section 40 and the electrical equipment, and the second positioning hole 53 facilitates the positioning of the second connecting section 50 and another electrical equipment. Meanwhile, the first positioning hole 43 and the second positioning hole 53 are also used to fix the conductive rod 100 to different electrical equipment.

[0071] In the embodiment of the present application, the stress in the conductive rod 100 is affected by many factors, such as the expansion coefficient of the conductive rod body 10, the aging temperature of the conductive rod body 10 (i.e. the temperature when the conductive rod body 10 vibrates), the aging time (i.e. the time when the conductive rod body 10 vibrates), and the elastic modulus E of the conductive rod body 10. Therefore, the present application screens out the most significant factor affecting the stress in the conductive rod body 10 through Design of Experiments (DOE).

[0072] The conductive rod 100 shown in FIG. 1 is used for simulation test as a test object to obtain the stress nephogram of the conductive rod 100. The specific test method of the simulation test is that the parameters of the conductive rod 100 and the parameters of the vibration simulation test are introduced into a finite element analysis element to perform simulation test on the conductive rod 100, wherein the working condition of the vibration simulation test is that the vibration broadband frequency is 10 Hz to 1000 Hz, and the vibration power density is 0.2 (m / s 2 ) 2 30 (m / s 2 )2 / Hz, the root mean square (RMS) of the vibration velocity is 27.8 m / s 2 The relationship between the influence factors such as the expansion coefficient, the aging temperature, the aging time, and the elastic modulus E and the maximum stress of the conductive rod 100 is studied through a large amount of experimental data, and part of the experimental result statistics are shown in Tables 1 to 4.

[0073] Table 1 Relationship between the expansion coefficient factor and the maximum stress of the conductive rod

[0074] Table 2 Relationship between the aging temperature factor and the maximum stress of the conductive rod

[0075] Table 3 Relationship between the aging time factor and the maximum stress of the conductive rod

[0076] Table 4 Relationship between the elastic modulus factor and the maximum stress of the conductive rod

[0077] It can be seen from Tables 1 to 4 that the expansion coefficient factor, the aging temperature factor, and the aging time factor have little effect on the stress of the conductive rod 100, and the elastic modulus factor has a significant effect on the stress of the conductive rod 100, so the elastic modulus factor is determined as the key factor. At the same time, it can be seen from Table 4 that the greater the elastic modulus of the conductive rod 100, the smaller the maximum stress value of the conductive rod 100 after being vibrated.

[0078] In the embodiments of the present application, six test groups are designed through DOE, and the reliability of the above-mentioned formula (1) is verified by changing the elastic modulus of the conductive rod 100 and the length of the conductive rod body 10.

[0079] The specific test method of the simulation test is that the parameters of the conductive rod 100 and the parameters of the vibration simulation test are imported into the finite element analysis element to perform a simulation test on the conductive rod 100, wherein the working condition of the vibration simulation test is that the vibration time is 22 h, the vibration broadband frequency is 10 Hz to 1000 Hz, the vibration power density is 0.2 (m / s 2 ) 2 / Hz to 30 (m / s 2 ) 2 / Hz, and the root mean square (RMS) of the vibration velocity is 27.8 m / s 2The simulation test results are shown in Table 5, and in combination with Figs. 3 to 8, Fig. 3 is a stress nephogram of the simulation test of the first test group disclosed in the embodiment of the application, Fig. 4 is a stress nephogram of the simulation test of the second test group disclosed in the embodiment of the application, Fig. 5 is a stress nephogram of the simulation test of the third test group disclosed in the embodiment of the application, Fig. 6 is a stress nephogram of the simulation test of the fourth test group disclosed in the embodiment of the application, Fig. 7 is a stress nephogram of the simulation test of the fifth test group disclosed in the embodiment of the application, and Fig. 8 is a stress nephogram of the simulation test of the sixth test group disclosed in the embodiment of the application.

[0080] Table 5 Relationship between maximum stress in the conductive rod and length, elastic modulus and diameter of the conductive rod body

[0081] In the embodiment of the application, under the same vibration simulation test conditions, it can be seen from Fig. 3 that the maximum stress of the conductive rod 100 of the first test group is 25.30 MPa, from Fig. 4 that the maximum stress of the conductive rod 100 of the second test group is 13.29 MPa, from Fig. 5 that the maximum stress of the conductive rod 100 of the third test group is 50.86 MPa, from Fig. 6 that the maximum stress of the conductive rod 100 of the fourth test group is 189.80 MPa, from Fig. 7 that the maximum stress of the conductive rod 100 of the fifth test group is 152.58 MPa, and from Fig. 8 that the maximum stress of the conductive rod 100 of the sixth test group is 110.74 MPa.

[0082] In the embodiment of the application, it can be seen from Table 5 that in the first test group, the second test group and the third test group, the diameter of the conductive rod body during the test belongs to the range of the diameter of the conductive rod body derived from the above formula (1), and in the fourth test group, the fifth test group and the sixth test group, the diameter of the conductive rod body during the test does not belong to the range of the diameter of the conductive rod body derived from the above formula (1). Moreover, the maximum stress of the conductive rod 100 of the first test group, the second test group and the third test group is much smaller than the maximum stress of the conductive rod 100 of the fourth test group, the fifth test group and the sixth test group.

[0083] In the embodiment of the application, the conductive rod 100 of the first test group, the second test group and the third test group is machined to perform a torque decay test on the conductive rod 100. The torque decay test conditions are: vibration time 22 h, vibration broadband frequency 10 Hz to 1000 Hz, and vibration power density 0.2 (m / s 2 ) 2 / Hz to 30 (m / s 2 ) 2 / Hz, and the root mean square (RMS) of the vibration velocity is 27.8 m / s 2 The torque decay test method is as follows: before the test, the bolt is assembled to the first connecting hole 41 and the bolt is assembled to the second connecting hole 51, and the conductive rod 100 is fixed by the cooperation of the nut and the bolt, specifically, the torque is gradually increased by the torque wrench, when the nut or the bolt starts to rotate slightly, the instantaneous torque value is the largest (the static friction needs to be overcome), and when the torque value falls to a short stable state, the torque value at this time is the torque value before the test; after the test, the torque is slowly applied to the nut or the bolt by the torque wrench, so that it is loosened, the instantaneous torque value when it starts to rotate is read, and according to the test and experience, a coefficient (generally 1.1-1.2) is multiplied to obtain the torque value after the test. The torque decay test results are shown in Table 6.

[0084] Table 6 Torque decay test results

[0085] According to the torque decay test results in Table 6, it is calculated that:

[0086] Decay value 1 = (6.05-5.35) / 6.05x100% = 11.57% < 20% (2)

[0087] Decay value 2 = (6.02-5.29) / 6.02x100% = 12.13% < 20% (3)

[0088] From the above formulas (2) and (3), it can be seen that the torque of the bolt and nut fixing the first connecting hole 41 decays by 11.57% after the torque test, and the torque of the bolt and nut fixing the second connecting hole 51 decays by 12.13% after the torque test.

[0089] It can be understood that the formula (1) proposed in the application achieves the optimal range of the ratio of the diameter, length and elastic modulus of the conductive rod 100, so that the stress in the vibrating conductive rod 100 is small and the torque decay of the fastener fixing the conductive rod 100 is less than 20%. Therefore, the conductive rod 100 proposed in the application can withstand the vibration under the condition of a wideband frequency of 10 Hz to 1000 Hz, a power density of 0.2 (m / s 2 ) 2 / Hz to 30 (m / s 2 ) 2 / Hz and the root mean square (RMS) of the vibration velocity is 27.8 m / s 2 for a long time.

[0090] In summary, the conductive rod 100 provided by the embodiment of the present application comprises a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies: wherein δ is the diameter of the conductive rod body 10, in mm (millimeter); L is the length of the conductive rod body 10, in mm; E is the elastic modulus of the conductive rod body 10, in Gpa (Gigapascal); and μ is 0.5 Gpa 1 / 4 Therefore, the diameter, length and elastic modulus of the conductive rod 100 are in the optimal range, so that the stress in the vibrating conductive rod 100 is small, and the torque attenuation of the fixing assembly for fixing the conductive rod 100 is also small.

[0091] It can be understood that the low mechanical properties of the conductive rod also cause the large stress in the conductive rod, the deformation of the conductive rod and the serious torque attenuation of the fixing assembly for fixing the conductive rod. Generally, the material of the conductive rod should satisfy that the yield strength is greater than or equal to 75 MPa, the tensile strength is greater than or equal to 114 MPa, the surface is free of cracks after bending 90 degrees, and the electrical conductivity is greater than or equal to 57% IACS. However, the higher the purity of the aluminum alloy, the better the electrical conductivity, but the lower the mechanical properties. Therefore, the conductive rod with good electrical conductivity in the prior art has low mechanical properties, and the conductive rod with good mechanical properties has low electrical conductivity.

[0092] In the embodiment of the present application, the material of the conductive rod 100 comprises magnesium (Mg) with a mass percentage of 0.02% to 0.85%, silicon (Si) with a mass percentage of 0.01% to 0.41%, boron (B) with a mass percentage of 0.01% to 0.04%, iron (Fe) with a mass percentage of 0.01% to 0.07%, and aluminum (Al) with a mass percentage of 98.59% to 99.95%. The total mass percentage of magnesium, silicon, boron, iron and aluminum is more than 99.9%, i.e. the mass percentage of other elements is less than 0.1%.

[0093] In the example embodiment, the material of the conductive rod 100 includes magnesium (Mg) with a mass percentage of 0.02% to 0.85%, for example, 0.02%, 0.1%, 0.22%, 0.3%, 0.35%, 0.42%, 0.5%, 0.6%, 0.71%, 0.8%, 0.85%, or other values, which are not specifically limited in the present application. The material of the conductive rod 100 includes silicon (Si) with a mass percentage of 0.01% to 0.41%, for example, 0.01%, 0.05%, 0.1%, 0.17%, 0.23%, 0.3%, 0.35%, 0.4%, 0.41%, or other values, which are not specifically limited in the present application. The material of the conductive rod 100 includes boron (B) with a mass percentage of 0.01% to 0.04%, for example, 0.01%, 0.02%, 0.03%, 0.04%, or other values, which are not specifically limited in the present application. The material of the conductive rod 100 includes iron (Fe) with a mass percentage of 0.01% to 0.07%, for example, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, or other values, which are not specifically limited in the present application. The material of the conductive rod 100 includes aluminum (Al) with a mass percentage of 98.59% to 99.95%, for example, 98.59%, 98.65%, 98.77%, 98.9%, 99%, 99.13%, 99.41%, 99.55%, 99.72%, 99.95%, or other values, which are not specifically limited in the present application.

[0094] In the embodiments of the present application, in order to verify that the material of the conductive rod 100 proposed in the present application has good electrical conductivity and mechanical properties, six groups of conductive rods with different materials are made, and the mechanical properties and electrical conductivity of the conductive rods are tested. The relationship between the material composition of the conductive rod and the mechanical properties and electrical conductivity is shown in Table 7.

[0095] Table 7 Material composition of the conductive rod and mechanical properties and electrical conductivity

[0096] As can be seen from Table 7, the mass percentage of each component in groups 1-3 and 4 is within the range of the mass percentage of each component of the material of the conductive rod 100 disclosed in the embodiments of the present application, and the mechanical properties and electrical conductivity of the conductive rods of groups 1-3 and 4 meet the requirements. In groups 5 and 6, the mass percentage of other elements is greater than 0.1%, and the mechanical properties of the conductive rods of groups 5 and 6 do not meet the requirements. Therefore, the conductive rod 100 disclosed in the present application has good electrical conductivity and mechanical properties.

[0097] It can be understood that, by adding Si and Fe to the conductive rod 100, the material of the conductive rod 100 comprises Al3Fe and AlSiFe. Among them, Al3Fe and AlSiFe are strengthening phases, which can improve the strength of the material. At the same time, Si and Fe can improve the die casting fluidity and die sticking when forming the conductive rod 100 (that is, the conductive rod 100 is formed by a die casting process). However, in the die casting process, too much Si and Fe will cause the material of the conductive rod 100 formed to have poor electrical conductivity, and too little Si and Fe will cause the strength of the conductive rod 100 formed to be insufficient, therefore, in the die casting process, the Si content in the die casting liquid for manufacturing the conductive rod 100 is less than 0.5wt%, and the Fe content is less than 0.1wt%. Among them, wt refers to the mass ratio.

[0098] It can also be understood that the conductive rod 100 disclosed in the present application is an aluminum alloy, and the conductive rod in the prior art is a copper alloy. The density of the conductive rod 100 of the present application is 2.68g / cm3, which is only about 30% of the density of a copper alloy, so that the weight of the conductive rod 100 of the present application is reduced by about 40% compared with the weight of the conductive rod in the prior art. At the same time, the cost of the conductive rod 100 of the present application is only about 50% of the cost of the conductive rod of the copper alloy, realizing lightweight design, reducing the energy consumption of the vehicle carrying the conductive rod 100, and improving the cruising range of the vehicle.

[0099] In an exemplary embodiment, the material of the conductive rod 100 is strengthened by alloying treatment and heat treatment, and the strength is more than one time higher than the strength of pure aluminum.

[0100] In the exemplary embodiments, the material of the electrically conductive rod 100 of the first test group is the same as that of the electrically conductive rod 100 of Group 1, so that the elastic modulus of the electrically conductive rod 100 of the first test group is the same as that of the electrically conductive rod 100 of Group 1. The material of the electrically conductive rod 100 of the second test group is the same as that of the electrically conductive rod 100 of Group 2, so that the elastic modulus of the electrically conductive rod 100 of the second test group is the same as that of the electrically conductive rod 100 of Group 2. The material of the electrically conductive rod 100 of the third test group is the same as that of the electrically conductive rod 100 of Group 3, so that the elastic modulus of the electrically conductive rod 100 of the third test group is the same as that of the electrically conductive rod 100 of Group 3. The material of the electrically conductive rod 100 of the fourth test group is the same as that of the electrically conductive rod 100 of Group 4, so that the elastic modulus of the electrically conductive rod 100 of the fourth test group is the same as that of the electrically conductive rod 100 of Group 4. The material of the electrically conductive rod 100 of the fifth test group is the same as that of the electrically conductive rod 100 of Group 5, so that the elastic modulus of the electrically conductive rod 100 of the fifth test group is the same as that of the electrically conductive rod 100 of Group 5. The material of the electrically conductive rod 100 of the sixth test group is the same as that of the electrically conductive rod 100 of Group 6, so that the elastic modulus of the electrically conductive rod 100 of the sixth test group is the same as that of the electrically conductive rod 100 of Group 6.

[0101] In another embodiment of the present application, referring to FIG. 9, which is a top view of a second structure of the electrically conductive rod according to the embodiments of the present application. The electrically conductive rod 100a of the second embodiment is different from the electrically conductive rod 100 of the first embodiment in that the electrically conductive rod body 10 of the electrically conductive rod 100a comprises a plurality of electrically conductive segments 11 and at least one bending segment 13.

[0102] Specifically, in the embodiments of the present application, the electrically conductive rod body 10 comprises a plurality of electrically conductive segments 11 and at least one bending segment 13, and the at least one bending segment 13 and the plurality of electrically conductive segments 11 are connected alternately.

[0103] In the exemplary embodiments, when the number of the bending segment 13 is one, the number of the electrically conductive segment 11 is two, and the bending segment 13 is connected between the two electrically conductive segments 11; when the number of the bending segment 13 is multiple, the plurality of bending segments 13 and the plurality of electrically conductive segments 11 are connected alternately.

[0104] It can be understood that in actual applications, since multiple electrical devices are not completely in a straight line, and the conductive rod is not completely straight, the conductive rod body 10 includes multiple conductive sections 11, and the multiple conductive sections 11 are distributed at different angles in the application space. If two conductive sections 11 are directly connected, stress concentration occurs at the connection of the two conductive sections 11. Therefore, in order to reduce the stress concentration at the connection of the two conductive sections 11, the bending section 13 in the overall shape of an arc-shaped cylinder is arranged between the two conductive sections 11, so that the angle of the connection of the two conductive sections 11 changes gently, avoiding stress concentration.

[0105] In an example embodiment, the included angle between two conductive sections 11 can be 35 degrees to 145 degrees, for example, 35 degrees, 45 degrees, 56 degrees, 60 degrees, 69 degrees, 80 degrees, 90 degrees, 100 degrees, 120 degrees, 136 degrees, 145 degrees, or other values, which are not specifically limited in the present application.

[0106] In an example embodiment, the bending section 13 can be a circular arc end, and the corresponding circular arc radius of the bending section 13 can be half of the diameter of the conductive rod body 10.

[0107] In an example embodiment, the number of bending sections 13 and the number of conductive sections 11 can be determined according to the number of bends of the conductive rod 100a. Further, the number of bends of the conductive rod 100a is consistent with the number of bending sections 13, and the number of conductive sections 11 is one more than the number of bending sections 13.

[0108] In an example embodiment, the first transition section 20 can also include multiple conductive sections 11 and at least one bending section 13, or the second transition section 30 can also include multiple conductive sections 11 and at least one bending section 13, or the first connection section 40 can also include multiple conductive sections 11 and at least one bending section 13, or the second connection section 50 can also include multiple conductive sections 11 and at least one bending section 13. That is, the bending of the conductive rod 100a can also be at the first transition section 20, the second transition section 30, the first connection section 40, or the second connection section 50, which is not specifically limited in the present application.

[0109] In another embodiment of the present application, referring to FIG. 10 and FIG. 11, FIG. 10 is a top view of a third structure of the conductive rod disclosed in the embodiments of the present application, and FIG. 11 is a sectional view of the conductive rod in FIG. 10 along XI-XI direction. The difference between the conductive rod 100b of the third embodiment and the conductive rod 100 of the first embodiment is that the conductive rod 100b further comprises a bonding layer 70, a reinforcing layer 80, an insulating layer 90 and a shielding layer 110.

[0110] In the embodiments of the present application, referring to FIG. 10 and FIG. 11, the conductive rod 100b further comprises the bonding layer 70 and the reinforcing layer 80. The bonding layer 70 is arranged on the surface of the conductive rod body 10, the surface of the first transition section 20, the surface of the second transition section 30, the surface of the first connecting section 40 and the surface of the second connecting section 50, i.e. the bonding layer 70 is sleeved on the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50. The reinforcing layer 80 is arranged on the outer surface of the bonding layer 70, and the first connecting hole 41 and the second connecting hole 51 both expose the reinforcing layer 80. The bonding layer 70 is used to bond the conductive rod body 10 and the reinforcing layer 80, the first transition section 20 and the reinforcing layer 80, the second transition section 30 and the reinforcing layer 80, the first connecting section 40 and the reinforcing layer 80, and the second connecting section 50 and the reinforcing layer 80, and the reinforcing layer 80 is used to resist stress.

[0111] In the exemplary embodiments, the first positioning hole 43 and the second positioning hole 53 also expose the bonding layer 70 and the reinforcing layer 80.

[0112] In the exemplary embodiments, the bonding layer 70 is connected with the surface of the conductive rod body 10, the surface of the first transition section 20, the surface of the second transition section 30, the surface of the first connecting section 40 and the surface of the second connecting section 50. The reinforcing layer 80 can be connected with the outer surface of the bonding layer 70.

[0113] In an exemplary embodiment, the bonding layer 70 can be formed by an electroplating or an electroless plating process. Specifically, in the electroplating process, metal ions in positive valence are reduced to metal atoms, which are adsorbed on the surfaces of the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50, and migrate to the deep of the surfaces of the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50, until incorporated into the lattices of the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50 to form the bonding layer 70. It can be understood that the bonding layer 70 formed by electroplating is relatively flat, and covers the surfaces of the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50. The surface of the bonding layer 70 has good bonding force and adhesion, which avoids the bonding layer 70 from falling off from the conductive rod body 10, the first transition section 20, the second transition section 30, the first connecting section 40 and the second connecting section 50, and the reinforcing layer 80 from falling off from the bonding layer 70. The reinforcing layer 80 can be formed by a coating process.

[0114] In an exemplary embodiment, the surface roughness Ra of the outer surface of the reinforcing layer 80 is less than or equal to 1.6. It can be understood that the lower the surface roughness, the higher the fatigue strength.

[0115] In an exemplary embodiment, the Vickers hardness HV of the reinforcing layer 80 is greater than 38 to improve the fatigue resistance of the reinforcing layer 80.

[0116] In the embodiment of the present application, after the strengthening layer 80 is formed, the strengthening layer 80 can be subjected to surface strengthening treatment to generate compressive stress on the surface thereof to improve the fatigue resistance. Specifically, a large number of high-speed continuous projectiles are sprayed to the strengthening layer 80 to hammer the strengthening layer 80 and form compression pits on the surface of the strengthening layer 80. Intense plastic deformation occurs in the region near the compression pits to form a plastic deformation layer with a certain thickness. In the plastic deformation layer, the microstructure of the strengthening layer 80 changes, and phenomena such as grain refinement, dislocation density increase, and micro-distortion increase occur, so that sub-grains are formed in the plastic deformation layer to increase the hardness of the strengthening layer 80. At the same time, by repeatedly forming the plastic deformation layer, a residual compressive stress layer exists in the plastic deformation layer, which can drive the cracks on the surface of the strengthening layer 80 from the surface layer to the subsurface layer, effectively reducing the tensile stress generated by external force or external torque on the surface layer, thereby effectively preventing and reducing the propagation speed of fatigue cracks. At the same time, through the above surface strengthening process, the strengthening layer 80 has the ability to resist salt spray corrosion and the ability to resist impact in an environment with 85% humidity and -40°C low temperature, and the strengthening layer 80 has excellent electrical conductivity and wear-resistant surface layer.

[0117] In the example embodiment, the material of the bonding layer 70 includes copper, and the material of the strengthening layer 80 includes nickel.

[0118] In the example embodiment, the thickness of the strengthening layer 80 can be 10 um, and the peeling strength of the strengthening layer 80 is 35 N / mm.

[0119] In the embodiment of the present application, as shown in FIG. 11, the conductive rod 100b further includes an insulating layer 90, the insulating layer 90 is arranged on part of the circumferential side of the strengthening layer 80, and the area where the first connecting hole 41 is located exposes the insulating layer 90, and the area where the second connecting hole 51 is located exposes the insulating layer 90. That is, the area where the first connecting hole 41 is located is not wrapped by the insulating layer 90, and the area where the second connecting hole 51 is located is not wrapped by the insulating layer 90. The insulating layer 90 insulates part of the circumferential surface of the strengthening layer 80. In the example embodiment, the insulating layer 90 can be formed by a spraying process, an extrusion process, or a dipping process.

[0120] In the example embodiment, the material of the insulating layer 90 can be epoxy resin.

[0121] In the example embodiment, the thickness of the insulating layer 90 can be 0.3 mm to 0.9 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or other values, which are not specifically limited in the present application.

[0122] In an example embodiment, the insulation layer 90 has an electrical resistance greater than 200 mΩ (mega-ohm). The insulation layer 90 can insulate 3000 V AC (alternating current) and has a leakage current less than 3 mA (milli-ampere) within 60 seconds under the condition of insulating 3000 V AC. The insulation layer 90 can also insulate 1000 V DC (direct current).

[0123] In the embodiment of the present application, as shown in FIG. 11, the conductive rod 100b further comprises a shielding layer 110, which is arranged on the circumferential side of the insulation layer 90 and connected with the insulation layer 90. The shielding layer 110 is used to shield the magnetic field.

[0124] It can be understood that the current passing through the conductive rod 100b is large, and the conductive rod 100b is prone to generate eddy current, which further generates magnetic field, thereby affecting the normal work of other conductive rods 100b or electrical equipment. Therefore, the shielding layer 110 can shield the magnetic field generated inside the conductive rod 100b and shield external magnetic field.

[0125] In an example embodiment, the area where the first positioning hole 43 is located and the area where the second positioning hole 53 is located are wrapped by the insulation layer 90 and the shielding layer 110, and the first positioning hole 43 and the second positioning hole 53 expose the insulation layer 90 and the shielding layer 110; or, the area where the first positioning hole 43 is located and the area where the second positioning hole 53 are not wrapped by the insulation layer 90 and the shielding layer 110, which is not limited in the present application.

[0126] In an example embodiment, the surface of the conductive rod 100b is further provided with a spray code, which is used to record the production and manufacturing information and performance information of the conductive rod 100b and other related information.

[0127] In summary, the conductive rod 100 (100a, 100b) provided by the embodiment of the present application comprises a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies: wherein δ is the diameter of the conductive rod body 10, in mm (millimeter); L is the length of the conductive rod body 10, in mm; E is the elastic modulus of the conductive rod body 10, in Gpa (gigapascal); μ is 0.5 Gpa 1 / 4Therefore, the diameter, length and elastic modulus of the conductive rod are matched to reach an optimal range, so that the stress in the vibrating conductive rod is small, and the torque attenuation of the fixing component assembly for fixing the conductive rod is also small, so that the conductive rod meets the long-term vibration working condition, and meanwhile, the conductive rod is prevented from being separated or broken due to vibration in the working process, so that the conductive rod assembly formed by the conductive rod is reliable and durable, and thus the vehicle has a large driving mileage on the actual road.

[0128] Based on the same inventive concept, the embodiment of the present application also provides a conductive rod assembly. Please refer to FIG. 12, which is a structural schematic diagram of the conductive rod assembly disclosed by the embodiment of the present application. The conductive rod assembly 300 provided by the embodiment of the present application comprises a connecting structure 200 and a plurality of conductive rods 100 (100a, 100b) described above, and the plurality of conductive rods 100 (100a, 100b) are fixed to the connecting structure 200. Since the embodiments shown in FIGS. 1 to 11 have been described in detail, they will not be described here.

[0129] In the exemplary embodiments, the connecting structure 200 can be an insulator, and the plurality of conductive rods are spaced apart from each other on the connecting structure 200.

[0130] In the exemplary embodiments, the positioning hole of the conductive rod is matched with the fixing component assembly to fix the conductive rod 100 (100a, 100b) to different electrical equipment.

[0131] In the exemplary embodiments, the positioning hole can be arranged in the area where the conductive rod body 10 is located, the area where the first transition section 20 is located, the area where the second transition section 30 is located, the area where the first connecting section 40 is located or the area where the second connecting section 50 is located, and the present application does not make specific limitation thereon.

[0132] In the exemplary embodiments, a single conductive rod 100 (100a, 100b) can be placed horizontally, vertically or at an arbitrary angle. The plurality of conductive rods 100 (100a, 100b) can be placed horizontally, vertically or at an arbitrary angle relative to each other, so that the plurality of conductive rods 100 (100a, 100b) form a multi-layer spatial three-dimensional layout in space, and the conductive rods 100 (100a, 100b) can be distributed outwardly in various combination modes, so that the conductive rod assembly 300 has the advantages of compact structure, high space utilization and convenient use.

[0133] In an example embodiment, the plurality of conductive rods 100 (100a, 100b) can be connected in series or in parallel with each other, which is not specifically limited in the present application. The plurality of conductive rods 100 (100a, 100b) can be arranged in a single layer or in multiple layers, which is not specifically limited in the present application. The plurality of conductive rods 100 (100a, 100b) can be connected with one or more connection structures 200.

[0134] In an example embodiment, the conductive rod 100 (100a, 100b) can be connected with the connection structure 200 through a snap ring.

[0135] In summary, the conductive rod assembly 300 provided by the embodiments of the present application includes a connection structure 200 and a plurality of conductive rods. The conductive rod 100 (100a, 100b) includes a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies: wherein δ is the diameter of the conductive rod body 10, in mm (millimeters); L is the length of the conductive rod body 10, in mm; E is the elastic modulus of the conductive rod body 10, in Gpa (Gigapascal); and μ is 0.5 Gpa 1 / 4 Therefore, the ratio of the diameter, length and elastic modulus of the conductive rod reaches an optimal range, so that the stress that may occur in the vibrating conductive rod is smaller, and the torque attenuation of the fixing assembly that fixes the conductive rod is also smaller.

[0136] Based on the same inventive concept, the embodiments of the present application also provide an electrical system. Please refer to FIG. 13, which is a structural schematic diagram of an electrical system disclosed by the embodiments of the present application. The electrical system 500 provided by the embodiments of the present application includes a plurality of electrical devices 400 and at least one conductive rod assembly 300 as described above. The two ends of the conductive rod of the conductive rod assembly 300 are respectively fixed to different electrical devices 400 and are electrically connected to transmit current.

[0137] In an example embodiment, the electrical device 400 includes, but is not limited to, a battery pack, a transformer, a motor, a circuit breaker, an AC / DC converter, a switch cabinet, a capacitor, a charging pile and the like, which is not specifically limited in the present application.

[0138] In an example embodiment, the electrical device 400 can be fixed to the connection structure 200.

[0139] In summary, the electrical system 500 provided by the embodiments of the present application includes an electrical device 400 and a conductive rod assembly 300. The conductive rod assembly 300 includes a connection structure 200 and a plurality of conductive rods. The conductive rod 100 (100a, 100b) includes a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies: Wherein, δ is the diameter of the conductive rod body 10, unit is mm (millimeter) ; L is the length of the conductive rod body 10, unit is mm; E is the elastic modulus of the conductive rod body 10, unit is Gpa (Gigapascal) ; μ is 0.5Gpa 1 / 4 Therefore, the diameter, length and elastic modulus of the conductive rod reach the optimal range, so that the stress in the vibrating conductive rod is small, and the torque attenuation of the fixing component assembly for fixing the conductive rod is also small.

[0140] Based on the same inventive concept, the embodiment of the present application also provides a vehicle. FIG. 14 is a structural schematic diagram of a vehicle according to the embodiment of the present application. The vehicle 800 provided by the embodiment of the present application comprises a vehicle body 700 and the above-mentioned electrical system 500, and the electrical system 500 is located in the vehicle body 700.

[0141] In the example embodiment, the vehicle 800 can be a new energy vehicle.

[0142] In summary, the vehicle 800 provided by the embodiment of the present application comprises a vehicle body 700 and an electrical system 500, the electrical system 500 comprises an electrical device 400 and a conductive rod assembly 300, the conductive rod assembly 300 comprises a connecting structure 200 and a plurality of conductive rods, the conductive rod 100 (100a, 100b) comprises a conductive rod body 10, wherein the diameter of the conductive rod body 10 satisfies: Wherein, δ is the diameter of the conductive rod body 10, unit is mm (millimeter) ; L is the length of the conductive rod body 10, unit is mm; E is the elastic modulus of the conductive rod body 10, unit is Gpa (Gigapascal) ; μ is 0.5Gpa 1 / 4 Therefore, the diameter, length and elastic modulus of the conductive rod reach the optimal range, so that the stress in the vibrating conductive rod is small, and the torque attenuation of the fixing component assembly for fixing the conductive rod is also small. Moreover, the conductive rod is applied to the vehicle 800, which can improve the electric energy conversion efficiency and power density of the vehicle, and make the electrical system 500 more miniaturized and lightweight. The vehicle 800 travels more than 200,000 kilometers, and the performance of the conductive rod does not attenuate.

[0143] In the description of the specification, the description using terms such as "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example" or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Moreover, the particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0144] It should be understood that the application is not limited to the examples described above, which can be modified or transformed by a person of ordinary skill in the art according to the above description, and all these modifications and transformations shall fall within the protection scope of the claims of the application. A person of ordinary skill in the art can understand that all or part of the methods of the above embodiments are implemented, and equivalent changes made according to the claims of the application still fall within the scope of the application.

Claims

1. An electrically conductive rod, characterized in that, comprises an electrically conductive rod body (10) whose diameter satisfies: wherein δ is the diameter of the electrically conductive rod body (10) in mm, L is the length of the electrically conductive rod body (10) in mm, E is the modulus of elasticity of the electrically conductive rod body (10) in Gpa, and μ is 0.5 Gpa 1 / 4 .

2. The electrically conductive rod of claim 1, wherein, The conductive rod further comprises a first transition section (20), a second transition section (30), a first connecting section (40) and a second connecting section (50), the first transition section (20) and the second transition section (30) are connected to opposite ends of the conductive rod body (10) respectively, the first connecting section (40) is connected to one end of the first transition section (20) away from the conductive rod body (10), and the second connecting section (50) is connected to one end of the second transition section (30) away from the conductive rod body (10). The cross-sectional area of the first transition section (20) is between the cross-sectional area of the first connecting section (40) and the cross-sectional area of the conductive rod body (10), and the cross-sectional area of the second transition section (30) is between the cross-sectional area of the second connecting section (50) and the cross-sectional area of the conductive rod body (10).

3. The electrically conductive rod of claim 2, wherein, A first connecting hole (41) is formed in the end of the first connecting section (40) away from the first transition section (20), and a second connecting hole (51) is formed in the end of the second connecting section (50) away from the second transition section (30), the first connecting hole (41) is used to fix the first connecting section (40) to an electrical equipment, and the second connecting hole (51) is used to fix the second connecting section (50) to another electrical equipment.

4. An electrically conductive rod as claimed in claim 2 or 3, characterized in that The end face of the first connecting section (40) away from the first transition section (20) is an arc face, and the end face of the second connecting section (50) away from the second transition section (30) is an arc face.

5. An electrically conductive rod as claimed in any one of claims 2 to 4, characterized in that A first positioning hole (43) is formed in the first connecting section (40), and a second positioning hole (53) is formed in the second connecting section (50), the first positioning hole (43) is used to position the first connecting section (40) and an electrical equipment, and the second positioning hole (53) is used to position the second connecting section (50) and another electrical equipment.

6. An electrically conductive rod as claimed in any one of claims 2 to 5, characterized in that The conductive rod body (10), the first transition section (20), the second transition section (30), the first connecting section (40) and the second connecting section (50) are integrally formed.

7. An electrically conductive rod as claimed in any one of claims 3 to 5, characterized in that The conductive rod further comprises a bonding layer (70) and a reinforcing layer (80), the bonding layer (70) is arranged on the surface of the conductive rod body (10), the surface of the first transition section (20), the surface of the second transition section (30), the surface of the first connecting section (40) and the surface of the second connecting section (50), and the reinforcing layer (80) is arranged on the outer surface of the bonding layer (70); the bonding layer (70) is used to bond the conductive rod body (10) and the reinforcing layer (80), the first transition section (20) and the reinforcing layer (80), the second transition section (30) and the reinforcing layer (80), the first connecting section (40) and the reinforcing layer (80), and the second connecting section (50) and the reinforcing layer (80).

8. The electrically conductive rod of claim 7, wherein, The first positioning hole (43) and the second positioning hole (53) expose the bonding layer (70) and the reinforcing layer (80).

9. An electrically conductive rod as claimed in claim 7 or 8, characterized in that The surface roughness of the outer surface of the reinforcing layer (80) is less than or equal to 1.6, and the Vickers hardness of the reinforcing layer (80) is greater than 38.

10. An electrically conductive rod as claimed in any one of claims 7 to 9, characterised in that, The conductive rod further comprises an insulating layer (90), the insulating layer (90) is arranged on the part of the circumferential side of the reinforcing layer (80), and the area where the first connecting hole (41) is located exposes the insulating layer (90), and the area where the second connecting hole (51) is located exposes the insulating layer (90).

11. The electrically conductive rod of claim 10, wherein, The conductive rod further comprises a shielding layer (110), the shielding layer (110) is arranged on the circumferential side of the insulating layer (90), and the shielding layer (110) is used for shielding the magnetic field.

12. The electrically conductive rod of any one of claims 1-11, wherein, The conductive rod body (10) comprises a plurality of conductive segments (11) and at least one bending segment (13), and the at least one bending segment (13) and the plurality of conductive segments (11) are connected alternately in sequence.

13. The electrically conductive rod of any one of claims 1-12, wherein, The material of the conductive rod comprises magnesium with a mass percentage of 0.02% to 0.85%, silicon with a mass percentage of 0.01% to 0.41%, boron with a mass percentage of 0.01% to 0.04%, iron with a mass percentage of 0.01% to 0.07%, and aluminum with a mass percentage of 98.59% to 99.95%.

14. The electrically conductive rod of claim 13, wherein, The total mass percentage of magnesium, silicon, boron, iron and aluminum is greater than 99.9%.

15. The electrically conductive rod of any one of claims 1-12, wherein, The material of the conductive rod comprises Al3Fe and AlSiFe.

16. The electrically conductive rod of any one of claims 1-15, wherein, The Based on experimental design acquisition.

17. The electrically conductive rod of any one of claims 1-16, wherein, The elastic modulus of the conductive rod body (10) ranges from 55Gpa to 120Gpa.

18. An electrically conductive pole assembly (300) characterized by, The conductive rod assembly (300) comprises a connecting structure and a plurality of conductive rods according to any one of claims 1-17, and the plurality of conductive rods are fixed to the connecting structure.

19. An electrical system (500), characterized by The electrical system comprises a plurality of electrical devices (400) and at least one conductive rod assembly (300) according to claim 18, and the two ends of the conductive rod of the conductive rod assembly (300) are respectively fixed to different electrical devices and electrically connected.

20. A vehicle (800) characterized by The vehicle comprises a vehicle body (700) and an electrical system (500) according to claim 19, and the electrical system (500) is located in the vehicle body (700).

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