Member support structure

Abstract

To make noise transmitted to a member case flow to a vehicle body side member.SOLUTION: A member support structure for supporting a metal member case that houses electronic components on a metal vehicle-body-side member (300) includes a mount plastic (40) that has a hollow structure and is deformable, a first coupling member (upper bolt 50a) that is disposed on one end side of the mount plastic (40) and is coupled to the member case, a second coupling member (lower bolt 50b) that is disposed on the other end side of the mount plastic (40) and is coupled to the vehicle-body-side member, and a conductive expanding and contracting member (conductive spring 44) that is disposed between the first coupling member and the second coupling member and is expandable and contractible. The member case and the vehicle body side member 300 are electrically conducted.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a member support structure for supporting a metal member case that houses electronic components on a metal vehicle body member. [Background technology]

[0002] Fuel cell vehicles are known and run on electricity generated by an onboard fuel cell. A large amount of electricity is required for the vehicle to run, and fuel cell vehicles are equipped with a fuel cell stack, which is made up of multiple stacked fuel cells housed in a fuel cell case.

[0003] A vehicle requires a power source of a predetermined voltage, and a DC-DC converter is installed in the fuel cell case together with the fuel cell stack. The DC-DC converter includes multiple switching elements, which generate electromagnetic noise when switched. The vehicle runs by driving a motor with power from the fuel cell. In this case, the power from the fuel cell is converted to a predetermined output by an inverter and supplied to the motor. The inverter includes multiple switching elements, which generate electromagnetic noise when switched.

[0004] Patent Document 1 discloses that the fuel cell case is made of an electromagnetic wave attenuation material that attenuates electromagnetic waves.

[0005] Furthermore, power conversion components such as the fuel cell stack and DC-DC converter are vulnerable to shocks, and fuel cell cases are often supported on the vehicle body by rubber mounts to prevent vibration. In particular, hydraulic mounts are used to further suppress shocks and acceleration during driving. Hydraulic mounts are disclosed in, for example, Patent Document 2. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication WO2007 / 046490 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-205418 Summary of the Invention [Problem to be solved by the invention]

[0007] Here, in a component case that houses an electromagnetic noise source inside, such as a fuel cell case, a structure that can effectively prevent leakage of electromagnetic noise with as simple a configuration as possible is desired. [Means for solving the problem]

[0008] The component support structure of the present disclosure is a component support structure for supporting a metal component case that houses electronic components on a metal vehicle body component, and includes a hollow and deformable mounting resin, a first connecting member that is arranged on one end of the mounting resin and connected to the component case, a second connecting member that is arranged on the other end of the mounting resin and connected to the vehicle body component, and a conductive elastic material that is arranged between the first connecting member and the second connecting member and is stretchable, so that the component case and the vehicle body component are electrically connected.

[0009] The conductive elastic material may be a coil spring.

[0010] The conductive elastic material may be a wave spring having a wave-shaped cross section.

[0011] The conductive elastic material may be a conductive resin.

[0012] The conductive resin may be disposed inside the mounting resin.

[0013] The mounting resin may be hollow and columnar, the first and second connecting members may be plate-shaped, and the conductive elastic material may be disposed within the hollow structure of the mounting resin.

[0014] The first connecting member may be hollow cylindrical, the second connecting member may be an inner shaft located in the center of the first connecting member, and the mounting resin and the conductive elastic material may extend radially to connect the first connecting member and the second connecting member. [Effects of the Invention]

[0015] According to the component support structure of the present disclosure, the component case and the vehicle body component are electrically connected, so that noise transmitted to the component case can be channeled to the vehicle body component. [Brief explanation of the drawings]

[0016] [Figure 1] 1A and 1B are diagrams showing the arrangement of conductive mounts on a fuel cell stack case and a control device case mounted on a fuel cell vehicle. [Figure 2] FIG. 2 is a diagram showing the configuration of a comparative example in which a non-conductive mount is used instead of the conductive mount in FIG. 1. [Figure 3] 1A and 1B are diagrams showing a first configuration example of a conductive mount 400 according to an embodiment, in which (A) is a front cross-sectional view and (B) is a plan view. [Figure 4] 10A and 10B are diagrams showing a second configuration example of the conductive mount 400, in which (A) is a front cross-sectional view and (B) is a perspective view of a conductive spring. [Figure 5] 10A and 10B are diagrams illustrating a third configuration example of a conductive mount. [Figure 6] 10A and 10B are diagrams showing a fourth configuration example of a conductive mount 400, in which (A) is a perspective view and (B) is a plan view. [Figure 7] 10A and 10B are diagrams showing a fifth configuration example of the conductive mount 400, in which (A) is a perspective view and (B) is a plan view. [Figure 8] 10A and 10B are diagrams showing a sixth configuration example of the conductive mount 400, in which (A) is a perspective view and (B) is a front cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the following embodiments do not limit the present disclosure, and configurations formed by selectively combining multiple examples are also included in the present disclosure.

[0018] "Configuration using conductive mount" 1 is a diagram showing the arrangement of a fuel cell stack case 100 mounted on a fuel cell vehicle and a conductive mount 400 on a controller case 200. The fuel cell stack case 100 and controller case 200 are collectively referred to as a component case.

[0019] The fuel cell stack case 100 has a two-tiered structure. The lower tier is a lower case 12 that houses the fuel cell stack 10, and the upper tier is an upper case 16 that houses the DC-DC converter 14. In this example, both the lower case 12 and the upper case 16 are hollow rectangular parallelepipeds, with the lower case 12 being slightly larger than the upper case 16.

[0020] The lower case 12 accommodates a fuel cell stack 10. The fuel cell stack 10 has a pair of electrodes 10a, 10b, from which a cable 20 extends. The fuel cell stack 10 is composed of a predetermined number of fuel cells, which are connected in series and parallel, and whose output is extracted from the electrodes 10a, 10b. A DC-DC converter 14 is disposed within the upper case 16. The DC-DC converter 14 includes multiple switching elements 14a for power conversion. The switching elements 14a are electronic components. A cooler 22 is connected to the switching elements 14a of the DC-DC converter 14. The cooler 22 is, for example, a heat exchanger through which a refrigerant circulates, and is thermally connected to the switching elements 14a. The DC-DC converter 14 converts the output power obtained at the pair of electrodes 10a, 10b into a desired voltage output.

[0021] The control device case 200 has a rectangular parallelepiped shape and houses an inverter 30 therein. The inverter 30 includes a plurality of switching elements 30a for power conversion. The control device case 200 and the internal inverter 30 are connected by a capacitance 38 such as a smoothing capacitor and stray capacitance. The inverter 30 converts the DC output from the DC-DC converter 14 into AC power corresponding to the target output of the motor and supplies it to the motor.

[0022] The switching element 30a of the inverter 30 and the output of the DC-DC converter 14 are connected to the inverter 30 by a cable 34. The cable 34 includes a PN line of a high-voltage cable covered with a shielded wire 36. The shielded wire 36 is electrically connected to the fuel cell stack case 100 and the control device case 200.

[0023] The fuel cell stack case 100 and the control device case 200 are supported on a vehicle body side member 300 by a conductive mount 400. As will be described later, this conductive mount 400 absorbs vibrations and shocks, but in this example it is conductive as a whole and electrically connects the fuel cell stack case 100 and the control device case 200 to the vehicle body side member 300. The vehicle body side member 300 is the vehicle body, a unit base, or the like.

[0024] "Configuration using non-conductive mount" Here, a case where a non-conductive mount 500 is used instead of the conductive mount 400 will be described.

[0025] Fuel cell vehicles have a system configuration that has multiple power conversion components, such as DC-DC converters and inverters, connected by high-voltage cables. Furthermore, to supply power to the various components, the power must be converted to various voltages and frequencies. Therefore, compared to hybrid electric vehicles (HEVs) and battery electric vehicles (BEVs), the system configuration is more complex.

[0026] Furthermore, in fuel cell vehicles, the trend towards smaller size, higher performance and lower costs has led to higher voltages and switching speeds, which has resulted in higher voltages and currents at noise sources, making noise countermeasures important.

[0027] Fuel cell stack cases and other power conversion components are vulnerable to shocks, and certain components are supported by mounts to reduce external acceleration. Furthermore, in special-purpose vehicles, etc., hydraulic mounts are used to further reduce shocks and acceleration during driving.

[0028] Almost all mounts used are made of rubber, and hydromounts use rubber and an internal viscous fluid to protect against impacts, but mounts are essentially insulating components, which also provide insulation between the fuel cell components and unit and the support frame and vehicle body.

[0029] In other words, two types of action - spring characteristics and damping characteristics - are essential to suppressing shock and vibration. Rubber materials (rubber + viscous fluid in the case of hydromounts) can achieve this at low cost while also satisfying other design requirements (environmental resistance, fatigue characteristics, formability, etc.). Because both rubber materials and viscous fluids are insulating materials, when a part is supported by a mount, there is insulation between the part and the supporting member.

[0030] Furthermore, if a rubber mount were to be completely covered with a metal case, the rigidity of the high-rigidity metal case would dominate between the part and the support member, rather than the rigidity of the rubber, and the mount would lose its function. Therefore, completely covering the mount with a metal case would fundamentally contradict the expression of the mount's function. For this reason, there is no need to expect noise transmission performance from the mount.

[0031] Fig. 2 is a diagram showing the configuration of a comparative example in which a non-conductive mount 500 made of, for example, rubber is used instead of the conductive mount 400 in Fig. 1. The configuration in Fig. 2 is the same as that in Fig. 1 except that the non-conductive mount 500 is used instead of the conductive mount 400.

[0032] 2, the flow of the transmitted noise current is indicated by the dotted arrows. The control device case 200 contains a switching element 30a, which is a power conversion component used to drive a high-power motor such as an inverter. Motors in electric vehicles and the like are usually PWM controlled, so the switching of the switching element 30a generates a relatively large noise current.

[0033] The noise current generated in this switching element 30a passes through the capacitor 38 and the shield wire 36 of the high-voltage cable, then passes from the element cooler 22 of the fuel cell stack case 100 to the switching element 22a of the DC-DC converter 14, and returns through the cable 34 (the PN line of the high-voltage cable). The reason for this path is that it is an easy path for the noise current to pass through, i.e., it has a relatively low impedance. For example, even if noise that has reached the fuel cell stack case 100 attempts to follow another path, the non-conductive mount 500 is an insulating material and has a much higher impedance than a path through the interior of the fuel cell stack case 100. Therefore, the noise current cannot return through the path that passes through the vehicle body member 300. Therefore, the noise current will flow through components inside the control device case 200, which may prevent those components from operating normally.

[0034] Furthermore, when such an abnormality occurs, it incurs significant costs such as additional component costs, space, and development man-hours, such as the need for ground wires and EMC (ElectroMagnetic Compatibility) countermeasure components, resulting in disadvantages such as higher costs, reduced space requirements, and longer development lead times.

[0035] 1 uses a conductive mount 400. Therefore, the noise current that reaches the fuel cell stack case 100 via the shielded wire 36 can be passed to the vehicle body side member 300 via the conductive mount 400.

[0036] "Conductive mount configuration example 1" 3A and 3B are diagrams showing a first configuration example of a conductive mount 400 according to an embodiment, with (A) being a front cross-sectional view and (B) being a plan view. The mount resin 40 is a hollow cylinder with a cylindrical cavity 42 formed in the center. The mount resin 40 is made of a deformable material such as natural rubber or synthetic rubber, and is stretchable at least in the vertical direction, and in this example, stretchable in six axes including torsion. In addition, in this example, the mount resin 40 is made of a rubber material and is an insulating material.

[0037] A conductive spring 44 extending in the vertical direction is disposed in the hollow portion 42 as a conductive elastic material. In this example, the conductive spring 44 is a metal coil spring and is elastically deformable. While stainless steel or the like can be used for the conductive spring 44, a high conductivity spring material can also be used. Various types of high conductivity spring materials are known, such as copper alloys and silver-plated materials, and these can be used.

[0038] An upper base 46 is fixed to the upper surface of the mount resin 40, and a lower base 48 is fixed to the lower surface, for example, by adhesive. An upper bolt 50a is fixed to the upper base 46, and a lower bolt 50b is fixed to the lower base 48. In this example, the shanks of the upper bolt 50a and the lower bolt 50b are fixed to the upper base 46 and the lower base 48, respectively. However, bolt holes may be formed in the upper base 46 and the lower base 48, and the shanks may protrude through the bolt holes while the bolt heads are held inside the pedestals. In this example, the upper end of the conductive spring 44 is electrically connected to the upper bolt 50a via a connecting piece 52a, and the lower end of the conductive spring 44 is electrically connected to the lower bolt 50b via a connecting piece 52b. In this example, since the upper base 46 and the lower base 48 are formed of a conductive material such as metal, the upper end of the conductive spring 44 can be simply connected to the upper base 46 and the lower end to the lower base 48, and the connecting pieces 52a and 52b can be omitted.

[0039] Then, by fixing the upper bolt 50a to a component case such as the fuel cell stack case 100 or the control equipment case 200, and fixing the lower bolt 50b to the vehicle body side component 300, the component case can be fixed to the vehicle body side component 300 via the conductive mount 400.

[0040] Here, the upper side of conductive spring 44 is connected to upper bolt 50a via connecting piece 52a, and the lower side is connected to lower bolt 50b via connecting piece 52b. Connecting pieces 44a and 44b have conductive rings onto which the ends of conductive spring 44 are hooked and fixed. Note that various means can be used as long as the electrical connection between conductive spring 44 and upper bolt 50a and lower bolt 50b can be made with low electrical resistance.

[0041] Furthermore, as long as the upper base 46 and the fuel cell stack case 100, and the lower base 48 and the vehicle body member 300 can be electrically connected, the upper bolts 50a and the lower bolts 50b may be made of a non-conductive material.

[0042] The upper bolt 50a and the lower bolt 50b can be fastened to the mating member by nuts or other methods. That is, the shafts of the upper and lower bolts 50, 52 can be inserted into holes in the mating member, and then nuts can be fastened on the opposite side of the mating member. Also, instead of fastening with bolts, they can be fastened to the mating member by other means such as welding.

[0043] In this embodiment, the upper bolt 50a, the upper base 46, the conductive spring 44, the lower base 48, and the lower bolt 50b are made of metal, and aluminum, steel, stainless steel, etc. can be used, but other metals can also be used.

[0044] In this embodiment, the upper bolt 50a, the upper base 46, and the connecting piece 52a constitute a first connecting member, and the lower bolt 50b, the lower base 48, and the connecting piece 52b constitute a second connecting member.

[0045] Such a conductive mount 400 can be disposed between the fuel cell stack case 100 and the vehicle body component 300, or between the controller case 200 and the vehicle body component 300, as shown in Figure 1. When the load on the conductive mount 400 changes, the mount resin 40 deforms to absorb some of the energy, damping the acceleration and mitigating vibrations and impacts on the fuel cell stack case 100 and the controller case 200. It is advisable to ensure that the strain stress value of the conductive spring 44 due to the acceleration of impact or vibration is equal to or less than the fatigue limit stress.

[0046] As described above, the mount resin 40 has a hollow structure, with a cavity 42 at its center, and the conductive spring 44 is installed within the cavity 42. This conductive spring 44 is made of a metal spring and has six degrees of freedom (six degrees of freedom including vertical, horizontal, and height, as well as torsional moments for each axis), with the spring constant for each axis set so as not to adversely affect the deformation of the mount resin 40. For example, it is preferable that the spring constant of the conductive spring 44 be 1 / 10 or less of the rigidity of the mount resin 40 in all directions, including the X, Y, and Z directions. The specifications for the coil spring can be determined by performing numerical calculations and shape design using FEM analysis based on the specification conditions.

[0047] Furthermore, by setting the electrical resistance of the conductive spring 44 to be sufficiently small and the electrical conductivity of the conductive mount 400 to be sufficiently high, the impedance of the path that passes through the conductive mount 400 can be set to 1 / 10 or less of the impedance of the path that does not pass through the conductive mount 400 in the MHz band.

[0048] As described above, this embodiment uses the conductive mount 400. This conductive mount 400 has sufficient electrical conductivity, i.e., extremely low impedance. Therefore, noise current transmitted to a component case such as the fuel cell stack case 100 can be quickly transmitted to the vehicle body component 300.

[0049] "Configuration Example 2" 4A and 4B are diagrams showing a second configuration example of the conductive mount 400, where (A) is a front cross-sectional view and (B) is a perspective view of the conductive spring. In the first configuration example described above, a coil spring, which is a general-purpose component, was used as the conductive spring 44. In the second configuration example, a wave spring is used as the conductive spring 44. The configuration other than the conductive spring 44 is the same as that of the first configuration example. As shown in the figure, the wave spring is made by bending a thin metal spring material in a serpentine shape, and has a predetermined elasticity in each direction.

[0050] Such wave springs are slightly more expensive than coil springs. However, wave springs have an extremely high degree of freedom in terms of shape, making it possible to meet high requirements for all conditions, including spring constant, impedance, and stress and strain. Therefore, wave springs are a good choice when it is difficult to meet the required specifications with coil springs. The shape of wave springs can also be determined by performing numerical calculations and shape design using FEM analysis based on the specification conditions.

[0051] "Configuration Example 3" FIG. 5 is a diagram showing a third configuration example of the conductive mount 400. In the third configuration example, a conductive resin 60 is disposed in the central cavity 42 as a conductive elastic material. That is, the conductive resin 60 is disposed inside the mount resin 40. The conductive resin 60 is, for example, a rubber material, and may be separate from the mount resin 40, or may be formed integrally with the mount resin 40 by incorporating a conductive material such as carbon into the central portion of the mount resin 40. Furthermore, if the conductive resin 60 is a separate material, a gap may exist between the two.

[0052] The material and size are determined so that the response to the load satisfies predetermined conditions. Furthermore, the conductive performance of the conductive resin 60 is designed to also satisfy the conditions.

[0053] The premise for use of this configuration example 3 is for use in a severe, special environment where there is a lot of salt damage, harmful rays, and poisonous (harmful) substances. That is, even if the center of the mount resin 40 is exposed to salt water, harmful rays, or harmful substances, the conductive resin 60 is highly resistant to these substances and therefore can maintain conductivity. For example, even if salt water briefly enters the central conductive resin 60, the salt water that has entered the interior is immediately expelled due to the surface pressure caused by the load on the conductive mount 400, thereby maintaining conductivity between the conductive resin 60 and the upper and lower pedestals 46, 48.

[0054] The conductive resin 60 is made of, for example, rubber, and does not suffer from deterioration such as rust that is typical of metal materials. The reason for enclosing the conductive resin 60 within the mount resin 40 is that the conductive resin 60 contains a large amount of conductive material, which may result in it being less weather-resistant and less resistant to chemical reactivity than resin that does not contain conductive material. In other words, under special environments, the conductive resin 60 is placed inside the mount resin 40, where it is not exposed to harmful rays or poisonous (harmful) substances.

[0055] Here, rubber, that is, natural rubber or synthetic rubber, is used for the mount resin 40. The electrical resistance value (impedance) of these is usually 10 10 That's all. On the other hand, the conductive resin 60 is made conductive by blending a conductive material such as carbon into the rubber. In the case of carbon, the specific resistance (Ωcm) is typically set to a single-digit or double-digit value by blending 30% or more carbon by weight. Therefore, by making the cross-sectional area of ​​the conductive resin 60 relatively large, it is possible to make the resistance value of the component 1 Ω or less. As mentioned above, there is no problem if the resistance value of the conductive mount 400 is sufficiently low, but that resistance value only needs to match the system requirements. Therefore, the resistance value of the mount resin 40 can also be determined according to the system requirements.

[0056] "Configuration Example 4" 6A and 6B are diagrams showing a fourth configuration example of a conductive mount 400, with (A) being a perspective view and (B) being a plan view. The fourth configuration example includes an annular outer wall 80 fixed to a fuel cell stack case 100 serving as a component case, and a cylindrical inner shaft 82 disposed at the center of the outer wall 80 and fixed to a vehicle body component 300. A bolt 50 is provided at the tip of the inner shaft 82. The outer wall 80 and inner shaft 82 are made of metal and are electrically conductive.

[0057] Mounting resin 40 is disposed in the internal space between the outer wall 80 and the inner shaft 82. Here, the mounting resin 40 does not fill the entire internal space, but is disposed in multiple locations in the circumferential direction via hollow portions 84. In the illustrated example, the internal space is divided into six circumferential sections, each with a central angle of 60 degrees, and triangular prism-shaped mounting resin 40 with a central angle of 60 degrees is disposed in three of the sections, while the remaining three sections are triangular prism-shaped hollow portions 84, which are disposed alternately in the circumferential direction.

[0058] Then, a conductive spring 44 is disposed in at least one cavity 84, extending in the radial direction and connecting the inner shaft 82 and the outer wall 80. This conductive spring 44 is made of the same spring material as in FIG.

[0059] It is preferable that the number of mount resins 40 and the number of cavities 84 are equal to or greater than two and that they are arranged symmetrically about the center. The conductive spring 44 may be provided in only one cavity 84 or in all cavities 84. The conductive spring 44 electrically connects the outer wall 80 and the inner shaft 82. In this example, the conductive spring 44 is a coil spring.

[0060] In this embodiment, the outer wall 80 constitutes a first connecting member, and the inner shaft 82 constitutes a second connecting member.

[0061] For example, the bolt 50 at the tip of the inner shaft 82 is fastened horizontally to the side wall of a vehicle body member 300, such as a cross member or side member. Meanwhile, the side end of the outer wall 80 is fixed to the fuel cell stack case 100. In this way, the conductive mount 400 is disposed between the vehicle body member 300 and the fuel cell stack case 100, suppressing the transmission of acceleration between them.

[0062] Furthermore, noise current from the fuel cell stack case 100 can be passed to the vehicle body side member 300 .

[0063] Such a conductive mount 400 may be used when it is difficult or not practical to fix the fuel cell stack case 100 and the vehicle body side member 300 in the vertical direction as shown in FIG.

[0064] "Configuration Example 5" 7A and 7B are diagrams showing a fifth configuration example of the conductive mount 400, with (A) being a perspective view and (B) being a plan view. In this fifth configuration example, a wave spring similar to that in the second configuration example is used as the conductive spring 44, instead of the coil spring in the fourth configuration example. Although wave springs are slightly more expensive than coil springs, they offer an extremely high degree of freedom in shape and are suitable for use when it is difficult to achieve all of the conditions for spring constant, impedance, and stress-strain with coil springs.

[0065] "Configuration Example 6" 8A and 8B are diagrams showing a sixth configuration example of the conductive mount 400, where (A) is a perspective view and (B) is a front cross-sectional view. In this sixth configuration example, the conductive mount 400 uses the same outer wall 80 and inner shaft 82 as in the fourth and fifth configuration examples.

[0066] Then, the mounting resin 40 and the conductive resin 60 are arranged in the doughnut-shaped (hollow cylindrical) space between the outer wall 80 and the inner shaft 82. That is, the two doughnut-shaped mounting resins 40 sandwich the doughnut-shaped conductive resin 60 from above and below, and the conductive resin 60 is arranged inside the mounting resin 40.

[0067] Even with this configuration, shocks and the like can be absorbed by the mounting resin 40 between the outer wall 80 and the inner shaft 82 and the conductive resin 60, and since the outer wall 80 and the inner shaft 82 are electrically connected by the conductive resin 60, noise current can be passed therethrough.

[0068] Like Configuration Example 3, Configuration Example 6 is intended for use in a severe, special environment with a lot of salt damage, harmful rays, and poisonous (harmful) substances. Therefore, the conductive rubber that makes up the conductive resin 60 is not exposed to the outside air.

[0069] "Effects of the embodiment" The conductive mount according to the embodiment improves the noise transmission performance from the case to the vehicle body, and can prevent adverse effects on various components, etc.

[0070] Furthermore, in this embodiment, the increase in the number of new parts is small, and the cost of the system can be reduced.

[0071] Furthermore, since there is no increase in space, it is possible to maintain competitiveness in miniaturizing systems.

[0072] As mentioned above, the application of the present invention to special-purpose vehicles and the like will enable us to provide products in this field that are even more highly functional and cost-competitive.

[0073] Conductive mounts can be designed to essentially satisfy the shock acceleration and vibration acceleration suppression performance of conventional non-conductive mounts. Therefore, the configuration of this embodiment does not cause any problems with these performances. For example, because the top cover 56 has six degrees of freedom, it does not affect the mount's inherent spring and damping characteristics.

[0074] There are no changes to the basic structure of the case or fuel cell stack, so there is no increase in weight or size.

[0075] Furthermore, the conductive mount is basically the same as a conventional mount, does not require new component design, and can be developed within the design range, so there is no increase in development costs or the time from ordering to delivery (lead time: LT).

[0076] The change in manufacturing method due to the change from the conventional mounting structure can be made using existing technology and equipment, so there is no decrease in productivity, no need to install new production equipment, and no increase in manufacturing costs. [Explanation of symbols]

[0077] 10 fuel cell stack, 12 lower case, 14 DC-DC converter, 16 upper case, 20, 34 cable, 22 element cooler, 30 inverter, 36 shielded wire, 38 capacitance, 40 mounting resin, 42 cavity, 44 conductive spring, 46 upper base, 48 lower base, 50 volts, 100 fuel cell stack case, 200 control equipment case, 300 vehicle body side component, 400 conductive mount, 500 non-conductive mount.

Claims

1. A component support structure for supporting a metal component case that houses electronic components on a metal vehicle body component, A hollow, deformable mounting resin, a first connecting member disposed on one end side of the mount resin and connected to the component case; a second connecting member that is disposed on the other end side of the mount resin and is connected to the vehicle body side member; a conductive elastic material disposed between the first connecting member and the second connecting member and capable of stretching; Including, The component case and the vehicle body component are electrically connected to each other. Member support structure.

2. The member support structure according to claim 1, The conductive elastic material is a coil spring. Member support structure.

3. The member support structure according to claim 1, the conductive elastic material is a wave spring having a wave-shaped cross section; Member support structure.

4. The member support structure according to claim 1, The conductive elastic material is a conductive resin. Member support structure.

5. The member support structure according to claim 4, The conductive resin is disposed inside the mounting resin. Member support structure.

6. The member support structure according to any one of claims 1 to 5, The mounting resin is hollow and columnar, the first and second connecting members are plate-shaped, The conductive elastic material is disposed in the hollow structure of the mounting resin. Member support structure.

7. The member support structure according to any one of claims 1 to 5, the first connecting member is hollow cylindrical; the second connecting member is an inner shaft disposed in a central portion of the first connecting member, the mounting resin and the conductive elastic material extend in a radial direction so as to connect the first connecting member and the second connecting member; Member support structure.

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