Conductive dielectric in components

Abstract

A conductive intervening material is needed that can reduce contact resistance and maintain that reduced contact resistance over the long term. [Solution] The conductive intervening member 1 is sandwiched between a first conductive member 11 and a second conductive member 12 that are fastened together. The conductive intervening member 1 has a metal plate-shaped body 2, a raised portion 3, and a recessed portion 4. The raised portion 3 rises from the surface 2a of the plate-shaped body 2. The recessed portion 4 is recessed on the back surface 2b of the plate-shaped body 2, integrally with the raised portion 3. A first conductive portion 3a is provided at the tip of the raised portion 3 to contact and conduct electricity with the first conductive member 11. A second conductive portion 4a is provided at least at the periphery of the recessed portion 4 to contact and conduct electricity with the second conductive member 12. When the first conductive member 11 and the second conductive member 12 are fastened together, the first conductive portion 3a is pressed against the first conductive member 11 and the second conductive portion 4a is pressed against the second conductive member 12.

Description

[Technical Field]

[0001] The present invention relates to a conductive interposing member sandwiched between two conductive members fastened to each other. [Background Art]

[0002] Patent Documents 1 to 3 disclose a conductive interposing member sandwiched between two conductive members, for example, between bus bars. There is demand for transmitting power at higher voltages and larger currents through power transmission using bus bars or the like. In order to suppress heat generation caused by power transmission, it is conceivable, for example, to increase the cross-sectional area of a bus bar to improve heat dissipation and reduce conduction resistance. However, this increases the amount of material used for the bus bar, leading to higher costs. In addition, the weight, rigidity, and installation space of the bus bar increase, resulting in lower workability and lower flexibility in design. Therefore, there is demand for a conductive interposing member capable of suppressing heat generation.

[0003] In order to suppress heat generation in a conductive interposing member, it is conceivable to reduce the contact resistance of the conductive interposing member with respect to the conductive member. Contact resistance includes boundary resistance and constriction resistance. Boundary resistance is caused by increased insulation resulting from thickening of an oxide film or the like on a surface. Constriction resistance is caused by the fact that the actual contact area of the conductive interposing member with respect to the conductive member is as small as one hundredth to one hundred-thousandth of the apparent contact area. Patent Document 1 discloses a claw cut and raised in the plate thickness direction from a plate-shaped conductive interposing member. When two conductive members are fastened with bolts, the tip of the claw pierces and breaks the oxide film on the conductive member, thereby reducing boundary resistance.

[0004] Patent Document 2 discloses a claw that is cut and bent in the thickness direction at the outer peripheral end of a conductive intervening member (e.g., a washer). When two conductive members are bolted together, the tip of the claw is crushed against the surface of the conductive member. This increases the true contact surface of the claw tip with the conductive member, thereby reducing concentrated resistance. Patent Document 3 discloses projections that protrude in the thickness direction from both the front and back surfaces of a plate-shaped conductive intervening member. The tips of these projections are also crushed against the surface of the conductive member by the fastening load, similar to Patent Document 2. This reduces concentrated resistance.

[0005] Conventional conductive intervening members had room for improvement in reducing contact resistance. For example, in the case of cut-and-bent claws, tension is less likely to occur perpendicular to the surface of the conductive member under fastening load. Therefore, the claws of the conductive intervening member are less likely to generate a load perpendicular to the surface of the conductive member. Furthermore, it is difficult to maintain the initial contact state of the claw tips after long-term use. If the claw tips are edge-shaped, the contact state is more easily changed due to wear of the claw tips. Changes in the contact state reduce the surface pressure applied to the claw tips, which may cause an oxide film to reform on the surface of the conductive member. Therefore, it is difficult to maintain the boundary resistance suppression effect.

[0006] For example, if the protrusions are provided on both the front and back surfaces of the conductive intervening member, as disclosed in Patent Document 3, the conductive intervening member will become thicker by the height of the protrusions on both sides. Furthermore, it is difficult to suppress variations in the rigidity of each protrusion. Therefore, it is difficult to suppress variations in the height of each protrusion that has been crushed after fastening. If there are variations in the height of each protrusion and variations in the surface pressure applied to each protrusion, variations in concentrated resistance will occur at each protrusion. As a result, current is more likely to flow through the protrusion with the smallest concentrated resistance, which may promote heat generation. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 6-60754 [Patent Document 2] Japanese Patent Publication No. 2012-9411 [Patent Document 3] Japanese Patent Publication No. 2016-85802 [Overview of the project] [Problems that the invention aims to solve]

[0008] Therefore, a conductive intervening member is needed that can reduce contact resistance and maintain that reduction over the long term. [Means for solving the problem]

[0009] One feature of this disclosure relates to a conductive intervening member sandwiched between a first conductive member and a second conductive member that are fastened together. The conductive intervening member has a metal plate-shaped body and a raised portion and a recessed portion. The raised portion rises from the surface of the plate-shaped body. The recessed portion is recessed on the back surface of the plate-shaped body, integrally with the raised portion. A first conductive portion is provided at the tip of the raised portion, which contacts and conducts with the first conductive member. A second conductive portion is provided, which contacts and conducts with the second conductive member at least at the periphery of the recessed portion. When the first conductive member and the second conductive member are fastened together, the first conductive portion is pressed against the first conductive member and the second conductive portion is pressed against the second conductive member.

[0010] Therefore, by creating raised and recessed portions, for example, through drawing or stretching processes, the first and second conductive portions can be provided with high rigidity. As a result, the first conductive portion, which is pressed against the first conductive member, elastically adheres closely to the first conductive member while destroying and removing oxide films and other materials on the contact surface of the first conductive member with high surface pressure. This reduces boundary resistance between the first conductive portion and the first conductive member. Due to the high rigidity of the first conductive portion, the contact state between the first conductive portion and the first conductive member is maintained over a long period of time. Thus, contact resistance between the first conductive portion and the first conductive member can be reduced, and this reduction in contact resistance can be maintained over a long period of time.

[0011] By providing a raised portion and a recessed portion on opposite sides, the first conductive portion at the tip of the raised portion and the second conductive portion at the periphery of the recessed portion can be brought closer together in the direction of fastening between the first conductive member and the second conductive member. As a result, the second conductive portion that presses against the second conductive member receives a reaction force from the first conductive portion that presses against the first conductive member. The second conductive portion, receiving the reaction force, elastically close to the second conductive member while destroying and removing oxide films and other materials on the contact surface of the second conductive member with high surface pressure. This reduces the boundary resistance between the second conductive portion and the second conductive member. Due to the high rigidity of the second conductive portion, the contact state between the second conductive portion and the second conductive member is maintained over the long term. Thus, contact resistance between the second conductive portion and the second conductive member can be reduced, and this reduction in contact resistance can be maintained over the long term.

[0012] According to other features of this disclosure, the raised portion is seamlessly connected from the periphery to the tip and is tapered. Therefore, by seamlessly connecting the periphery and tip of the raised portion, the tip of the raised portion can be provided with high rigidity. The periphery and bottom of the recess are also seamlessly connected. Therefore, the periphery of the recess can be provided with high rigidity. Furthermore, by providing the raised portion in a tapered shape, the tip of the raised portion can be positioned inside the periphery of the recess. Therefore, the reaction force received by the tip of the raised portion from the first conductive member can be uniformly transmitted to the periphery of the recess. In addition, the connection portion between the periphery and tip of the raised portion extends in a direction intersecting the contact surface of the first conductive member and the contact surface of the second conductive member. Therefore, the connection portion acts as a brace, maintaining high surface pressure in the first conductive portion and high surface pressure in the second conductive portion.

[0013] According to other features of this disclosure, the raised portion elastically deforms while fastening the first conductive member and the second conductive member together. Therefore, the first conductive portion of the raised portion elastically deforms and, in a crushed state, elastically contacts the first conductive member with high surface pressure. When the first conductive portion is crushed, it destroys and removes the oxide film, etc., on the contact surface of the first conductive member. By maintaining the fastened state between the first conductive member and the second conductive member, the crushed shape of the first conductive portion is maintained over a long period of time. The second conductive portion of the recessed portion receives the reaction force caused by the crushing of the first conductive portion and elastically contacts the second conductive member with high surface pressure while destroying and removing the oxide film, etc., on the contact surface of the second conductive member. By maintaining the fastened state between the first conductive member and the second conductive member, the elastic contact state with high surface pressure between the second conductive portion and the second conductive member is maintained over a long period of time. Thus, contact resistance can be reduced in both the first and second conductive portions, and the reduction in contact resistance can be maintained over a long period of time.

[0014] According to other features of this disclosure, the plate-shaped body has a through hole. The through hole is through which a bolt fastening a first conductive member and a second conductive member to each other can be inserted. The raised portion is positioned near the through hole so as to be in the direction of extension of the bolt leg relative to the bolt head. Therefore, the first conductive portion at the tip of the raised portion receives the axial force generated by fastening the bolt substantially uniformly. This suppresses deformation of the first conductive portion and variations in surface pressure at the first conductive portion. This suppresses variations in contact resistance at the first conductive portion. The second conductive portion at the periphery of the recess, which is integral to the front and back of the raised portion, also receives the axial force substantially uniformly. Therefore, deformation of the second conductive portion and variations in surface pressure at the second conductive portion can be suppressed. This suppresses variations in contact resistance at the second conductive portion. Thus, current unevenness can be suppressed in both the first and second conductive portions, thereby suppressing heat generation.

[0015] Another feature of this disclosure relates to a method for manufacturing a conductive intervening member sandwiched between a first conductive member and a second conductive member that are fastened together. A metal plate-shaped base material is prepared. The plate-shaped base material is drawn or stretched to form a plurality of raised portions that protrude from the surface of the plate-shaped base material, and a plurality of recesses that are recessed on the back surface of the plate-shaped base material in conjunction with each of the multiple raised portions. The plate-shaped base material is punched or cut to form a conductive intervening member having the plurality of raised portions and the plurality of recesses.

[0016] Therefore, by creating raised and recessed portions through drawing or stretching processes, the tips of the raised portions that press against the first conductive member and the periphery of the recessed portion that presses against the second conductive member can be provided with high rigidity. As a result, the tips of the raised portions elastically adhere closely to the first conductive member while destroying and removing oxide films and other materials from the contact surface of the first conductive member with high surface pressure. The highly rigid tips of the raised portions maintain contact with the first conductive member over a long period of time. Thus, contact resistance between the tips of the raised portions and the first conductive member can be reduced, and this reduction in contact resistance can be maintained over a long period of time. Furthermore, by providing multiple raised portions, multi-point contact due to high surface pressure is formed, thereby reducing concentrated resistance.

[0017] By providing a raised portion and a recessed portion on opposite sides, the tip of the raised portion and the periphery of the recessed portion can be brought closer together in the direction of fastening between the first conductive member and the second conductive member. As a result, the periphery of the recessed portion that presses against the second conductive member receives a reaction force from the tip of the raised portion that presses against the first conductive member. The periphery of the recessed portion, receiving this reaction force, elastically adheres closely to the second conductive member while destroying and removing oxide films and other materials from the contact surface of the second conductive member with high surface pressure. The periphery of the recessed portion, having high rigidity, maintains contact with the second conductive member over a long period. Thus, contact resistance between the periphery of the recessed portion and the second conductive member can be reduced, and this reduction in contact resistance can be maintained over a long period. Furthermore, by providing multiple recessed portions, multi-point contact due to high surface pressure is formed, thereby reducing concentrated resistance. [Brief explanation of the drawing]

[0018] [Figure 1] This is a side view of a fastening structure including a conductive intervening member according to a first embodiment of the present disclosure. [Figure 2] It is an exploded perspective view of the fastening structure. [Figure 3] It is a perspective view of the conductive interposition member viewed from above. [Figure 4] It is a perspective view of the conductive interposition member viewed from below. [Figure 5] It is a side cross-sectional view of a fastening structure including the conductive interposition member. [Figure 6] It is a cross-sectional view schematically showing the formation of the raised portion and the recessed portion. [Figure 7] It is a side cross-sectional view of the raised portion and the recessed portion of the conductive interposition member after fastening. [Figure 8] It is a graph showing the contact resistance between the first conductive member and the second conductive member versus fastening torque. [Figure 9] It is a top view of the conductive interposition member according to the second embodiment. [Figure 10] It is a cross-sectional view taken along line X-X in FIG. 9. [Figure 11] It is a cross-sectional view of the conductive interposition member according to the third embodiment at a position corresponding to the cross-section taken along line X-X in FIG. 9. [Figure 12] It is a top view of the conductive interposition member according to the fourth embodiment. [Figure 13] It is a cross-sectional view taken along line XIII-XIII in FIG. 12. [Figure 14] It is a side cross-sectional view of a fastening structure including the conductive interposition member according to the fifth embodiment. [Figure 15] It is a side cross-sectional view of a fastening structure including the conductive interposition member according to the sixth embodiment. [Figure 16] It is a side cross-sectional view of a fastening structure including the conductive interposition member according to the seventh embodiment. [Figure 17] It is a perspective view during assembly of a fastening structure including the conductive interposition member according to the eighth embodiment. [Figure 18] It is a perspective view during assembly of a fastening structure including the conductive interposition member according to the ninth embodiment. [Figure 19] It is a perspective view of the conductive interposition member according to the tenth embodiment. MODE FOR CARRYING OUT THE INVENTION

[0019] [First Embodiment] A first embodiment of this disclosure will be described with reference to Figures 1 to 8. This disclosure exemplifies a fastening structure 10 provided in, for example, a plug-in hybrid vehicle or an electric vehicle. The fastening structure 10 is provided in a power transmission path that electrically connects electrical components such as a drive battery, inverter, and motor. A large current, for example, 300A to 700A or 500A, flows through the fastening structure 10 at a high voltage of, for example, 400V to 500V. As shown in Figure 1, the fastening structure 10 has a first conductive member 11 and a second conductive member 12, which are plate-shaped busbars. The first conductive member 11 and the second conductive member 12 are fastened to each other by bolts 13 and nuts 14. A plate-shaped conductive intervening member 1 is sandwiched between the planar contact surface 11a of the first conductive member 11 and the planar contact surface 12a of the second conductive member 12. The conductive intervening member 1 is made of a conductive metal material.

[0020] As shown in Figure 2, the first conductive member 11 and the second conductive member 12 each have substantially circular through holes 11b and 12b that penetrate in the thickness direction. The through holes 11b and 12b are substantially the same diameter. The conductive intervening member 1 has a flat plate-shaped body 2. The plate-shaped body 2 is circular when viewed from the thickness direction. A circular through hole 5 is provided in the center of the plate-shaped body 2, penetrating the plate-shaped body 2 in the thickness direction. The leg 13b of the bolt 13 is inserted in the order of the through hole 11b of the first conductive member 11, the through hole 5 of the conductive intervening member 1, and the through hole 12b of the second conductive member 12. The tip of the leg 13b protruding from the through hole 12b is bolted to the threaded hole 14a of the nut 14. As a result, the first conductive member 11, the conductive intervening member 1, and the second conductive member 12 are sandwiched between the head 13a of the bolt 13 and the nut 14.

[0021] As shown in Figure 1, the plate-shaped body 2 has a planar surface 2a and a back surface 2b that are substantially parallel to each other. Surface 2a faces the contact surface 11a of the first conductive member 11. Back surface 2b faces the contact surface 12a of the second conductive member 12. For the sake of explanation, the orientation of the conductive intervening member 1 is specified, but it may also be assembled with surface 2a facing the second conductive member 12 and back surface 2b facing the first conductive member 11.

[0022] As shown in Figure 5, the conductive intervening member 1 has a plurality of raised portions 3 and a plurality of recesses 4. The plurality of raised portions 3 are raised from the surface 2a. The plurality of recesses 4 are recessed on the back surface 2b toward the surface 2a. The plurality of raised portions 3 and the plurality of recesses 4 are provided in equal numbers, for example, eight of each (see Figures 3 and 4). The plurality of raised portions 3 are provided in substantially the same shape and with substantially the same height. The plurality of raised portions 3 and the plurality of recesses 4 are arranged at substantially equal intervals in the circumferential direction around the through hole 5. Each raised portion 3 and each recess 4 is positioned at a substantially equal distance from the center of the plate-shaped body 2. Each recess 4 is provided integrally with each raised portion 3 on both the front and back surfaces.

[0023] As shown in Figure 3, the raised portion 3 is circular when viewed perpendicular to the surface 2a. The raised portion 3 has a first conductive portion 3a at its most protruding tip. The raised portion 3 has a peripheral edge 3b that surrounds the first conductive portion 3a in an annular shape. The peripheral edge 3b is seamlessly connected to the surface 2a of the plate-shaped body 2. The connecting portion 3c seamlessly connects the first conductive portion 3a and the peripheral edge 3b. Therefore, the first conductive portion 3a is seamlessly connected to the surface 2a of the plate-shaped body 2. The connecting portion 3c is tapered, gradually approaching the first conductive portion 3a from the peripheral edge 3b, and is, for example, conical or spherical.

[0024] As shown in Figure 4, the recess 4 is circular when viewed perpendicular to the surface of the back surface 2b. The recess 4 has a bottom portion 4b and a second conductive portion 4a on its periphery that surrounds the bottom portion 4b in an annular shape. The second conductive portion 4a is seamlessly connected to the back surface 2b of the plate-shaped body 2. The connecting portion 4c seamlessly connects the second conductive portion 4a and the bottom portion 4b.

[0025] As shown in Figure 5, the bottom 4b of the recess 4 is located on the back side of the first conductive portion 3a of the raised portion 3 in the thickness direction of the plate-shaped body 2. The second conductive portion 4a of the recess 4 is located on the back side of the peripheral edge 3b of the raised portion 3 in the thickness direction of the plate-shaped body 2. The connecting portion 4c of the recess 4 is located on the back side of the connecting portion 3c of the raised portion 3 in the thickness direction of the plate-shaped body 2. The thickness between the first conductive portion 3a and the bottom 4b, the thickness between the peripheral edge 3b and the second conductive portion 4a, and the thickness between the connecting portion 3c and the connecting portion 4c are approximately constant.

[0026] As shown in Figure 5, the first conductive portion 3a has at least a portion of a convex curved surface that faces outward (away from the surface 2a). The entire first conductive portion 3a is a convex spherical shape that faces outward. The periphery 3b has at least a portion of a concave curved surface that faces toward the recess 4. The entire circumferential direction of the periphery 3b is a concave curved surface toward the recess 4. The entire circumferential direction of the periphery 3b is not concave with respect to the surface 2a, and the outer edge of the periphery 3b is smoothly connected to the surface 2a.

[0027] As shown in Figure 5, the bottom portion 4b is a concave curved surface that follows the first conductive portion 3a and faces toward the first conductive portion 3a, for example, it is spherical. The second conductive portion 4a has at least a portion of a convex curved surface that faces outward (away from the back surface 2b). The second conductive portion 4a is a convex curved surface that faces outward, following the peripheral edge 3b. The entire circumferential direction of the second conductive portion 4a does not protrude toward the back surface 2b, and the outer peripheral edge of the peripheral edge 4a is smoothly connected to the back surface 2b.

[0028] As shown in Figure 5, the raised portion 3 contacts the contact surface 11a of the first conductive member 11 at its first conductive portion 3a at its tip, but does not contact the contact surface 11a of the first conductive member 11 at its periphery 3b and connecting portion 3c. The recessed portion 4 contacts the contact surface 12a of the second conductive member 12 at its second conductive portion 4a at its periphery, but does not contact the contact surface 12a of the second conductive member 12 at its bottom portion 4b and connecting portion 4c.

[0029] As shown in Figure 5, the raised portion 3 is elastic due to the curved structure of the first conductive portion 3a and the peripheral edge 3b. The raised portion 3 deforms elastically mainly in the direction of elevation, in other words, in the thickness direction of the plate-shaped body 2, and can also be elastically deformed in the direction that conforms to the surface 2a of the plate-shaped body 2. The first conductive portion 3a of the raised portion 3 is subjected to an axial force generated by fastening the bolt 13 and nut 14 together, and a spring force due to the elastic deformation of the raised portion 3. The axial force and spring force act in the thickness direction of the plate-shaped body 2. Therefore, the first conductive portion 3a is elastically pressed against the contact surface 11a of the first conductive member 11.

[0030] As shown in Figure 5, the first conductive portion 3a is formed in a curved shape, so that it presses against the contact surface 11a of the first conductive member 11 with high surface pressure. The first conductive portion 3a presses against the contact surface 11a while destroying and removing oxide films and other materials adhering to the contact surface 11a. As a result, the boundary resistance between the first conductive portion 3a and the contact surface 11a is reduced. As the state in which the first conductive portion 3a is pressed against the contact surface 11a is maintained, the first conductive portion 3a continues to destroy and remove oxide films and other materials. This stably reduces the boundary resistance between the first conductive portion 3a and the contact surface 11a. Thus, the first conductive portion 3a and the contact surface 11a become electrically connected with reduced contact resistance.

[0031] As shown in Figure 5, the back surface 2b of the plate-shaped body 2 and the second conductive portion 4a of the recess 4 are in contact with the contact surface 12a of the second conductive member 12. The second conductive portion 4a of the recess 4 is subjected to an axial force generated by fastening the bolt 13 and nut 14 together, and a reaction force received by the first conductive portion 3a from the contact surface 11a of the first conductive member 11. The axial force and reaction force act in the thickness direction of the plate-shaped body 2. Therefore, the second conductive portion 4a is elastically pressed against the contact surface 12a of the second conductive member 12.

[0032] As shown in Figure 5, the second conductive portion 4a is formed in a curved shape, so that it presses against the contact surface 12a of the second conductive member 12 with high surface pressure. The second conductive portion 4a presses against the contact surface 12a while destroying and removing oxide films and other materials adhering to the contact surface 12a. As a result, similar to the first conductive portion 3a, the boundary resistance between the second conductive portion 4a and the contact surface 12a is reduced. As the state in which the second conductive portion 4a presses against the contact surface 12a is maintained, the second conductive portion 4a continues to destroy and remove oxide films and other materials. This stably reduces the boundary resistance between the second conductive portion 4a and the contact surface 12a. Thus, the second conductive portion 4a and the contact surface 12a become electrically connected with reduced contact resistance.

[0033] As shown in Figure 5, at least a portion of the multiple raised portions 3 and the multiple recesses 4 are located in the direction of extension of the leg 13b relative to the head 13a of the bolt 13 (downward in the figure). Preferably, a portion of each second conductive portion 4a is located at the same position as the outer peripheral edge of the head 13a or further inward. More preferably, each first conductive portion 3a is located at the same position as the outer peripheral edge of the head 13a or further inward. This makes it easier for the first conductive portion 3a of each raised portion 3 to receive the axial force generated by the fastening of the bolt 13 and the nut 14 together.

[0034] The formation process of the raised portion 3 and recessed portion 4 is shown with reference to Figure 6. First, a flat, plate-shaped base material 6 made of metal is prepared. The plate-shaped base material 6 is sandwiched between a die 8 and a wrinkle-holding mechanism 9. A punch 7 is pressed into the hole of the die 8 using a press machine. This allows the raised portion 3 and recessed portion 4 to be formed by drawing or stretching. Drawing is defined as a press process in which the thickness of the raised portion 3 and recessed portion 4 is approximately constant, while stretching is defined as a press process in which the plate-shaped base material 6 stretches during pressing, causing the thickness of the raised portion 3 and recessed portion 4 to become partially thinner (thinned). In other words, the raised portion 3 and recessed portion 4, whose mutual thickness is approximately constant, are formed by drawing. The raised portion 3 can also be formed by press processing using, for example, an upper die and a lower die (not shown), not just a punch and die.

[0035] The first conductive portion 3a, the bottom portion 4b, the peripheral edge 3b, and the second conductive portion 4a are all formed with a curved shape. The first conductive portion 3a and the bottom portion 4b are formed with mutually similar curved shapes. The peripheral edge 3b and the second conductive portion 4a are formed with mutually similar curved shapes. After forming the multiple raised portions 3 and the multiple recessed portions 4, the plate-shaped base material 6 is punched or cut to form the outer peripheral edge and through-hole 5 of the plate-shaped body 2 (see Figure 3). In this way, a conductive intervening member 1 having multiple raised portions 3 and multiple recessed portions 4 can be formed (see Figures 3 and 4).

[0036] Figure 7 schematically shows the raised portion 3 and recessed portion 4 deformed by pressure welding after fastening. Depending on the structure of the raised portion 3 and recessed portion 4 and the axial force generated when the bolt 13 and nut 14 (see Figure 5) are fastened, the raised portion 3 and recessed portion 4 may undergo partial plastic deformation, particularly at the first conductive portion 3a and bottom portion 4b. In this case as well, as shown in Figure 5, the first conductive portion 3a, which is in contact with high surface pressure, elastically presses against the contact surface 11a of the first conductive member 11 while destroying and removing the oxide film, etc., on the contact surface 11a. Similarly, the second conductive portion 4a, receiving the reaction force that the first conductive portion 3a receives from the contact surface 11a, elastically presses against the contact surface 12a of the second conductive member 12 while destroying and removing the oxide film, etc., on the contact surface 12a. Thus, the boundary resistance is reduced between the first conductive portion 3a and the contact surface 11a, and between the second conductive portion 4a and the contact surface 12a.

[0037] Figure 8 shows the contact resistance between the first conductive member 11 and the second conductive member 12 with respect to the fastening torque between the bolt 13 and the nut 14 (see Figure 5). The results measured without inserting the conductive intervening member 1 of this disclosure between the first conductive member 11 and the second conductive member 12 are shown by white circles. The results measured with the conductive intervening member 1 inserted between the first conductive member 11 and the second conductive member 12 are shown by black circles. In both cases, the contact resistance decreases as the fastening torque increases. When the conductive intervening member 1 is interposed, the contact resistance is lower than when it is not interposed. When the current value is the same, the amount of heat generated is proportional to the contact resistance. Therefore, by interposing the conductive intervening member 1, the amount of heat generated can be reduced in proportion to the reduction rate of contact resistance compared to when it is not interposed.

[0038] As described above, the conductive intervening member 1 is sandwiched between the first conductive member 11 and the second conductive member 12, which are fastened together as shown in Figures 1, 2, and 5. The conductive intervening member 1 has a metal plate-shaped body 2, a raised portion 3, and a recessed portion 4. The raised portion 3 rises from the surface 2a of the plate-shaped body 2. The recessed portion 4 is recessed on the back surface 2b of the plate-shaped body 2, integrally with the raised portion 3. A first conductive portion 3a is provided at the tip of the raised portion 3, which contacts and conducts with the first conductive member 11. A second conductive portion 4a is provided at least at the periphery of the recessed portion 4, which contacts and conducts with the second conductive member 12. When the first conductive member 11 and the second conductive member 12 are fastened together, the first conductive portion 3a is pressed against the first conductive member 11 and the second conductive portion 4a is pressed against the second conductive member 12.

[0039] Therefore, by creating the raised portion 3 and the recessed portion 4, for example, by drawing or stretching, the first conductive portion 3a and the second conductive portion 4a can be provided with high rigidity. As a result, the first conductive portion 3a, which is pressed against the first conductive member 11, elastically adheres closely to the first conductive member 11 while destroying and removing the oxide film and the like on the contact surface 11a of the first conductive member 11 with high surface pressure. This reduces the boundary resistance between the first conductive portion 3a and the first conductive member 11. Due to the high rigidity of the first conductive portion 3a, the contact state between the first conductive portion 3a and the first conductive member 11 is maintained over a long period of time. Thus, the contact resistance between the first conductive portion 3a and the first conductive member 11 can be reduced, and this reduction in contact resistance can be maintained over a long period of time.

[0040] By providing the raised portion 3 and the recessed portion 4 as a single unit on both sides, the first conductive portion 3a at the tip of the raised portion 3 and the second conductive portion 4a at the periphery of the recessed portion 4 can be brought closer together in the direction of fastening the first conductive member 11 and the second conductive member 12. As a result, the second conductive portion 4a, which is in pressure contact with the second conductive member 12, receives a reaction force from the first conductive portion 3a, which is in pressure contact with the first conductive member 11. Receiving this reaction force, the second conductive portion 4a elastically closes to the second conductive member 12 while destroying and removing the oxide film and other materials on the contact surface 12a of the second conductive member 12 with high surface pressure. This reduces the boundary resistance between the second conductive portion 4a and the second conductive member 12. Due to the high rigidity of the second conductive portion 4a, the contact state between the second conductive portion 4a and the second conductive member 12 is maintained over a long period of time. Thus, contact resistance between the second conductive portion 4a and the second conductive member 12 can be reduced, and this reduction in contact resistance can be maintained over a long period of time.

[0041] As shown in Figures 3 and 5, the raised portion 3 is seamlessly connected from its periphery 3b to its tip (first conductive portion) 3a and is tapered. Therefore, by seamlessly connecting the periphery 3b and tip 3a of the raised portion 3, the tip 3a of the raised portion 3 can be provided with high rigidity. Similarly, the periphery (second conductive portion) 4a and bottom 4b of the recess 4 are also seamlessly connected. Therefore, the periphery 4a of the recess 4 can be provided with high rigidity. Furthermore, by providing the raised portion 3 in a tapered shape, the tip 3a of the raised portion 3 can be positioned inside the periphery 4a of the recess 4. Therefore, the reaction force received by the tip 3a of the raised portion 3 from the first conductive member 11 can be uniformly transmitted to the periphery 4a of the recess 4. In addition, the connecting portion 3c between the periphery 3b and tip 3a of the raised portion 3 extends in a direction intersecting the contact surface 11a of the first conductive member 11 and the contact surface 12a of the second conductive member 12. Therefore, the connecting portion 3c acts as a brace, which helps maintain high surface pressure at the first conductive portion 3a and high surface pressure at the second conductive portion 4a.

[0042] As shown in Figure 5, the raised portion 3 elastically deforms in a state that fastens the first conductive member 11 and the second conductive member 12 together. Therefore, the first conductive portion 3a of the raised portion 3 elastically deforms and collapses (see Figure 7), making close elastic contact with the first conductive member 11 with high surface pressure. When the first conductive portion 3a collapses, it destroys and removes the oxide film, etc., on the contact surface 11a of the first conductive member 11. By maintaining the fastening state between the first conductive member 11 and the second conductive member 12, the collapsed shape of the first conductive portion 3a is maintained over a long period of time. The second conductive portion 4a of the recess 4 receives the reaction force caused by the collapse of the first conductive portion 3a, and while destroying and removing the oxide film, etc., on the contact surface 12a of the second conductive member 12, it makes close elastic contact with the second conductive member 12 with high surface pressure. By maintaining the fastened state between the first conductive member 11 and the second conductive member 12, an elastic contact state is maintained over a long period of time due to the high surface pressure between the second conductive portion 4a and the second conductive member 12. Thus, contact resistance can be reduced in both the first conductive portion 3a and the second conductive portion 4a, and this reduction in contact resistance can be maintained over a long period of time.

[0043] As shown in Figures 2 and 5, the plate-shaped body 2 has a through hole 5. The through hole 5 allows a bolt 13 to be inserted through which the first conductive member 11 and the second conductive member 12 are fastened together. The raised portion 3 is positioned near the through hole 5 so as to be located in the direction of extension of the leg 13b relative to the head 13a of the bolt 13. Therefore, the first conductive portion 3a at the tip of the raised portion 3 receives the axial force generated by fastening the bolt 13 in a substantially uniform manner. This suppresses deformation of the first conductive portion 3a and variations in surface pressure at the first conductive portion 3a. This suppresses variations in contact resistance at the first conductive portion 3a. The second conductive portion 4a at the periphery of the recess 4, which is integral to the front and back of the raised portion 3, also receives the axial force in a substantially uniform manner. Therefore, deformation of the second conductive portion 4a and variations in surface pressure at the second conductive portion 4a are suppressed. This suppresses variations in contact resistance at the second conductive portion 4a. Thus, current imbalance can be suppressed in both the first conductive portion 3a and the second conductive portion 4a, thereby suppressing heat generation.

[0044] As shown in Figures 5 and 6, the method for manufacturing the conductive intervening member 1, which is sandwiched between the first conductive member 11 and the second conductive member 12 that are fastened together, involves preparing a metal plate-shaped base material 6. The plate-shaped base material 6 is subjected to drawing or stretching to form a plurality of raised portions 3 that protrude from the surface of the plate-shaped base material 6, and a plurality of recesses 4 that are recessed on the back surface of the plate-shaped base material 6, integrally with each of the multiple raised portions 3. The plate-shaped base material 6 is then punched or cut to form a conductive intervening member 1 having the plurality of raised portions 3 and the plurality of recesses 4.

[0045] Therefore, by forming the raised portion 3 and recessed portion 4 through drawing or stretching, the tip (first conductive portion) 3a of the raised portion 3 that presses against the first conductive member 11 and the periphery (second conductive portion) 4a of the recessed portion 4 that presses against the second conductive member 12 can be provided with high rigidity. As a result, the tip 3a of the raised portion 3 elastically adheres closely to the first conductive member 11 while destroying and removing the oxide film etc. on the contact surface 11a of the first conductive member 11 with high surface pressure. The tip 3a of the raised portion 3, which has high rigidity, maintains contact with the first conductive member 11 for a long period of time. Thus, contact resistance between the tip 3a of the raised portion 3 and the first conductive member 11 can be reduced, and the reduction in contact resistance can be maintained for a long period of time. In addition, by providing multiple raised portions 3, multi-point contact due to high surface pressure is formed, so concentrated resistance can be reduced.

[0046] By providing the raised portion 3 and the recessed portion 4 as a single unit on opposite sides, the tip 3a of the raised portion 3 and the peripheral edge 4a of the recessed portion 4 can be brought closer together in the direction of fastening the first conductive member 11 and the second conductive member 12. As a result, the peripheral edge 4a of the recessed portion 4 that presses against the second conductive member 12 receives a reaction force from the tip 3a of the raised portion 3 that presses against the first conductive member 11. The peripheral edge 4a of the recessed portion 4, receiving the reaction force, elastically adheres closely to the second conductive member 12 while destroying and removing the oxide film and other materials on the contact surface 12a of the second conductive member 12 with high surface pressure. The peripheral edge 4a of the recessed portion 4, which has high rigidity, maintains contact with the second conductive member 12 over a long period of time. Thus, contact resistance between the peripheral edge 4a of the recessed portion 4 and the second conductive member 12 can be reduced, and this reduction in contact resistance can be maintained over a long period of time. Furthermore, by providing multiple recessed portions 4, multi-point contact due to high surface pressure is formed, thereby reducing concentrated resistance.

[0047] [Second Example] A second embodiment of this disclosure will be described with reference to Figures 9 and 10. The conductive intervening member 20 of the second embodiment, like the conductive intervening member 1 of the first embodiment (see Figure 3), has a metal, flat, plate-shaped body 21 and a circular through-hole 24 that penetrates the center of the plate-shaped body 21. The plate-shaped body 21 is circular when viewed in the thickness direction. The plate-shaped body 21 has a surface 21a and a back surface 21b that are substantially parallel to each other. The conductive intervening member 20 has a plurality of raised portions 22 on the surface 21a side and a plurality of recesses 23 on the back surface 21b side. In the following description, only the parts that differ from the first embodiment will be described in detail.

[0048] As shown in Figure 9, the multiple raised portions 22 are provided with substantially the same shape and substantially the same height. The multiple raised portions 22 are arranged at substantially equal intervals in the circumferential direction around the through hole 24. Each raised portion 22 is rectangular in shape, elongated in the radial direction of the plate-shaped body 21 when viewed from the direction perpendicular to the surface 21a. The multiple raised portions 22 are arranged radially from the center of the plate-shaped body 21 when viewed from the direction perpendicular to the surface 21a. Each raised portion 22 is positioned at substantially equal distances from the center of the plate-shaped body 21. Although not shown, the multiple recesses 23 (see Figure 10) are provided in the same number as each raised portion 22, integrated with the front and back of each raised portion 22, and are provided at substantially the same position and with substantially the same shape as each raised portion 22 when viewed from the direction perpendicular to the surface 21a. The inner circumferences of the multiple protrusions 22 and the inner circumferences of the multiple recesses 23 are positioned in the direction of extension of the leg 13b of the bolt 13 relative to the head 13a of the bolt 13 (see Figures 2 and 5).

[0049] As shown in Figure 10, the raised portion 22 is mountain-shaped when viewed from a circumferential cross-section perpendicular to the longitudinal direction (radial direction of the plate-shaped body 21). The raised portion 22 rises from the surface 21a. A first conductive portion 22a is provided as the tip of the peak portion of the raised portion 22. The first conductive portion 22a extends long in the longitudinal direction of the raised portion 22. The raised portion 22 has a peripheral edge 22b that surrounds the first conductive portion 22a in an annular shape. The peripheral edge 22b and the surface 21a are connected seamlessly. The connecting portion 22c connects the first conductive portion 22a and the peripheral edge 22b seamlessly. In the cross-section of Figure 10, the connecting portion 22c is tapered, gradually approaching the first conductive portion 22a from the peripheral edge 22b.

[0050] As shown in Figure 10, the recess 23 has a bottom portion 23b and a second conductive portion 23a on its peripheral edge that surrounds the bottom portion 23b in an annular shape. The second conductive portion 23a and the back surface 21b are seamlessly connected. The connecting portion 23c seamlessly connects the second conductive portion 23a and the bottom portion 23b. The bottom portion 23b, the second conductive portion 23a, and the connecting portion 23c are located on the back sides of the first conductive portion 22a, the peripheral edge 22b, and the connecting portion 22c, respectively, in the thickness direction of the plate-shaped body 21. The thickness of the raised portion 22 and the recess 23 is not constant; for example, the thickness of the first conductive portion 22a and the bottom portion 23b is thinner than the thickness of the peripheral edge 22b and the second conductive portion 23a. That is, the raised portion 22 and the recess 23 are provided by the overhanging process described above. The first conductive portion 22a, the peripheral edge 22b, the second conductive portion 23a, and the bottom portion 23b are each provided with a curved shape, similar to the first embodiment shown in Figure 5.

[0051] As shown in Figure 10, the raised portion 22 contacts the contact surface 11a of the first conductive member 11 (see Figure 5) at its first conductive portion 22a at its tip, but does not contact the peripheral edge 22b or the connecting portion 22c. The recessed portion 23 contacts the contact surface 12a of the second conductive member 12 at its second conductive portion 23a at its peripheral edge, but does not contact the bottom portion 23b or the connecting portion 23c. The raised portion 22 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 22a and the peripheral edge 22b. The first conductive portion 22a and the second conductive portion 23a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure. The conductive intervening member 20 of the second embodiment described above provides the same effects as the first embodiment.

[0052] [Third Embodiment] A third embodiment of this disclosure will be described with reference to Figure 11. Unlike the raised portion 22 and recessed portion 23 of the second embodiment (see Figure 10), the conductive intervening member 30 of the third embodiment has raised portion 32 and recessed portion 33 with asymmetrical circumferential cross-sectional shapes. The plate-shaped body 31 of the conductive intervening member 30 has a surface 31a and a back surface 31b that are substantially parallel to each other. Multiple raised portions 32 are provided on the surface 31a side. Multiple recessed portions 33 are provided on the back surface 31b side, which are integral to each raised portion 32. In the following description, only the parts that differ from the first and second embodiments will be described in detail.

[0053] As shown in Figure 11, the raised portion 32 is mountain-shaped when viewed from a circumferential cross-section. The raised portion 32 rises from the surface 31a. Multiple raised portions 32 are provided, each having approximately the same shape and approximately the same height. The peak portion of the raised portion 32 is positioned biased to the left in the illustration, which is the tightening direction of the bolt 13 (see Figure 5). The peak portion of the raised portion 32 is provided with a first conductive portion 32a as its tip. The raised portion 32 has a peripheral edge 32b that surrounds the first conductive portion 32a in an annular shape. The peripheral edge 32b and the surface 31a are connected seamlessly. The connecting portion 32c connects the first conductive portion 32a and the peripheral edge 32b seamlessly. In the cross-section of Figure 11, the connecting portion 32c tapers gradually from the peripheral edge 32b towards the first conductive portion 32a.

[0054] As shown in Figure 11, the recess 33 has a bottom portion 33b and a second conductive portion 33a on its peripheral edge that surrounds the bottom portion 33b in an annular shape. The second conductive portion 33a and the back surface 31b are seamlessly connected. The connecting portion 33c seamlessly connects the second conductive portion 33a and the bottom portion 33b. The bottom portion 33b is positioned to the left in the figure, which is the back side of the first conductive portion 32a in the thickness direction of the plate-shaped body 31. The second conductive portion 33a and the connecting portion 33c are located on the back sides of the peripheral edge 32b and the connecting portion 32c, respectively, in the thickness direction of the plate-shaped body 31. The thickness of the raised portion 32 and the recess 33 is approximately constant. The first conductive portion 32a, the peripheral edge 32b, the second conductive portion 33a, and the bottom portion 33b are each provided with a curved shape, similar to the first embodiment shown in Figure 5.

[0055] As shown in Figure 11, the raised portion 32 contacts the contact surface 11a (see Figure 5) of the first conductive member 11 at its first conductive portion 32a at its tip, but does not contact the peripheral edge 32b or the connecting portion 32c. The recessed portion 33 contacts the contact surface 12a of the second conductive member 12 at its second conductive portion 33a at its peripheral edge, but does not contact the bottom portion 33b or the connecting portion 33c.

[0056] As shown in Figure 11, the raised portion 32 is elastically deformable in the raising direction (up and down direction in the illustration) and the circumferential direction (left and right direction in the illustration) due to the curved structure of the first conductive portion 32a and the peripheral edge 32b. The first conductive portion 32a and the second conductive portion 33a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a (see Figure 5) with high surface pressure. The conductive intervening member 30 of the second embodiment described above provides the same effects as the first embodiment. The conductive intervening member 30 of the third embodiment described above provides the same effects as the first embodiment. Furthermore, with the conductive intervening member 30, the raised portion 32 has elasticity in the circumferential direction, specifically in the tightening direction of the bolt 13 (see Figure 5). Therefore, the raised portion 32 and the recessed portion 33 also function as a loosening prevention measure that restricts rotation of the bolt 13 in the loosening direction.

[0057] [Fourth embodiment] A fourth embodiment of this disclosure will be described with reference to Figures 12 and 13. The conductive intervening member 40 of the fourth embodiment has a metal, flat, plate-shaped body 41 and a circular through-hole 46 that penetrates the center of the plate-shaped body 41. The plate-shaped body 41 is rectangular when viewed in the thickness direction. The plate-shaped body 41 has a surface 41a and a back surface 41b that are substantially parallel to each other. The surface 41a side is provided with a plurality of first raised portions 42 and a plurality of second raised portions 44. The back surface 41b side is provided with a plurality of first recesses 43 and a plurality of second recesses 45. The plurality of first raised portions 42 are each substantially the same shape and have substantially the same raised height. The plurality of second raised portions 44 are each substantially the same shape and have substantially the same raised height. In the following description, only the parts that differ from the first embodiment will be described in detail.

[0058] As shown in Figure 12, a plurality of first raised portions 42 are provided around the through hole 46 at approximately equal intervals in the circumferential direction, for example, eight of them. Each first raised portion 42 is circular in shape when viewed perpendicular to the surface 41a. Each first raised portion 42 is positioned at approximately equal distances from the center of the plate-shaped body 41. A total of four second raised portions 44 are provided at each of the four corners of the plate-shaped body 41. Each second raised portion 44 is triangular in shape when viewed perpendicular to the surface 41a, following the shape of the corner of the plate-shaped body 41. Each second raised portion 44 is positioned at approximately equal distances from the center of the plate-shaped body 41. Although not shown, a plurality of first recesses 43 and a plurality of second recesses 45 (see Figure 13) are provided in the same number, at approximately the same positions, and with approximately the same shape as the first raised portions 42 and second raised portions 44, on opposite sides of each other.

[0059] As shown in Figure 13, the first conductive portion 42a, peripheral edge 42b, and connecting portion 42c of the first raised portion 42 are provided in the same shape as the first conductive portion 3a, peripheral edge 3b, and connecting portion 3c of the raised portion 3 in the first embodiment (see Figure 5). The second conductive portion 43a, bottom portion 43b, and connecting portion 43c of the first recess 43 are arranged on the back side in the thickness direction of the plate-shaped body 41, with shapes that follow the peripheral edge 42b, the first conductive portion 42a, and the connecting portion 42c, respectively. The first raised portion 42 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 42a and peripheral edge 42b. The first conductive portion 42a and the second conductive portion 43a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure.

[0060] As shown in Figure 13, the second raised portion 44 rises from the surface 41a. A first conductive portion 44a is provided at the raised tip of the second raised portion 44. The first conductive portion 44a is planar and substantially parallel to the surface 41a. The first conductive portion 44a of the second raised portion 44 is set lower than the first conductive portion 42a of the first raised portion 42. The second raised portion 44 has a peripheral edge 44b that surrounds the first conductive portion 44a in an annular shape. The peripheral edge 44b and the surface 41a are seamlessly connected. The connecting portion 44c seamlessly connects the first conductive portion 44a and the peripheral edge 44b. The connecting portion 44c extends substantially perpendicular to the surface 41a.

[0061] As shown in Figure 13, the second recess 45 has a bottom portion 45b and a second conductive portion 45a on its peripheral edge that surrounds the bottom portion 45b in an annular shape. The second conductive portion 45a and the back surface 41b are seamlessly connected. The connecting portion 45c seamlessly connects the second conductive portion 45a and the bottom portion 45b. The bottom portion 45b, the second conductive portion 45a, and the connecting portion 45c are located on the back sides of the first conductive portion 44a, the peripheral edge 44b, and the connecting portion 44c, respectively, in the thickness direction of the plate-shaped body 41. The thickness of the second raised portion 44 and the second recess 45 is approximately constant. The peripheral edge 44b and the second conductive portion 45a are each provided with a curved shape.

[0062] As shown in Figure 13, at least a portion of each first protrusion 42 and each first recess 43 is positioned in the direction of extension of the leg 13b relative to the head 13a of the bolt 13. The plurality of second protrusions 44 and the plurality of second recesses 45 are positioned on the outer circumference side of the head 13a of the bolt 13. The first protrusion 42 contacts the contact surface 11a of the first conductive member 11 at its first conductive portion 42a at its tip, but does not contact at its periphery 42b and connecting portion 42c. When the axial force generated by fastening the bolt 13 and the nut 14 is even higher, the second protrusion 44 contacts the contact surface 11a of the first conductive member 11 at its first conductive portion 44a after the first conductive portion 42a, but does not contact at its periphery 44b and connecting portion 44c. The first recess 43 and the second recess 45 contact the contact surface 12a of the second conductive member 12 at the second conductive portions 43a and 45a on their periphery, but do not contact at the bottom portions 43b and 45b and the connecting portions 43c and 45c.

[0063] As shown in Figure 13, the first raised portion 42 is elastically deformable mainly in the raised direction due to its curved structure. The first conductive portions 42a, 44a and the second conductive portions 43a, 45a are formed in a curved shape or a shape including a localized curve, and when they come into contact with the contact surfaces 11a, 12a, they elastically make close contact with high surface pressure. The conductive intervening member 40 of the fourth embodiment described above provides the same effects as the first embodiment. Furthermore, when an axial force is applied until the first conductive portion 44a of the second raised portion 44 comes into contact with the contact surface 11a of the first conductive member 11, the fastening operation is temporarily stopped by the rigidity of the second raised portion 44. Therefore, it can also function as a stopper to prevent excessive fastening.

[0064] [Fifth Example] A fifth embodiment of the present disclosure will be described with reference to Figure 14. The conductive intervening member 50 of the fifth embodiment has a metal, flat, plate-shaped body 51 and a circular through-hole 56 that penetrates the center of the plate-shaped body 51. The plate-shaped body 51 has a surface 51a and a back surface 51b that are substantially parallel to each other. The surface 51a side is provided with a plurality of first raised portions 52 and a plurality of second raised portions 54. The back surface 51b side is provided with a plurality of first recesses 53 and a plurality of second recesses 55. The plurality of first raised portions 52 are each provided with substantially the same shape and substantially the same height. The plurality of second raised portions 54 are each provided with substantially the same shape and substantially the same height. In the following description, only the parts that differ from the first and fourth embodiments will be described in detail.

[0065] As shown in Figure 14, the first conductive portion 52a, peripheral edge 52b, and connecting portion 52c of the first raised portion 52 are provided in the same shape and position as the first conductive portion 42a, peripheral edge 42b, and connecting portion 42c of the first raised portion 42 in the fourth embodiment (see Figure 13). The second conductive portion 53a, bottom portion 53b, and connecting portion 53c of the first recess 53 are arranged on the back side in the thickness direction of the plate-shaped body 51, with shapes that follow the peripheral edge 52b, the first conductive portion 52a, and the connecting portion 52c, respectively. The first raised portion 52 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 52a and peripheral edge 52b. The first conductive portion 52a and the second conductive portion 53a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure.

[0066] As shown in Figure 14, the second raised portion 54 and the second recessed portion 55 are provided in the same positions as the second raised portion 44 and the second recessed portion 45 in the fourth embodiment (see Figure 13). The periphery 54b of the second raised portion 54 and the second conductive portion 55a of the second recessed portion 55 are provided in the same shape as the periphery 42b and the second conductive portion 43a in the fourth embodiment (see Figure 13). The first conductive portion 54a of the second raised portion 54 is a convex spherical shape directed outward (away from the surface 51a). The first conductive portion 54a of the second raised portion 54 is lower than the first conductive portion 52a of the first raised portion 52. The connecting portion 54c is tapered, gradually approaching the first conductive portion 54a from the periphery 54b. The periphery 54b and the surface 51a are seamlessly connected. The connecting portion 54c seamlessly connects the first conductive portion 54a and the peripheral edge 54b.

[0067] As shown in Figure 14, the bottom 55b of the second recess 55 is a concave curved surface that follows the shape of the first conductive portion 54a. The second conductive portion 55a and the back surface 51b are seamlessly connected. The connecting portion 55c seamlessly connects the second conductive portion 55a and the bottom 55b. The second raised portion 54 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 54a and the periphery 54b. The first conductive portion 54a and the second conductive portion 55a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure when in contact.

[0068] As shown in Figure 14, the first raised portion 52 contacts the contact surface 11a of the first conductive member 11 at its first conductive portion 52a at its tip, but does not contact the peripheral edge 52b or the connecting portion 52c. The second raised portion 54, when the axial force generated by fastening the bolt 13 and nut 14 is even higher, contacts the contact surface 11a of the first conductive member 11 at its first conductive portion 54a after the first conductive portion 52a, but does not contact the peripheral edge 54b or the connecting portion 54c. The first recess 53 and the second recess 55 contact the contact surface 12a of the second conductive member 12 at their second conductive portions 53a and 55a at their peripheral edges, but does not contact the bottom portions 53b and 55b or the connecting portions 53c and 55c.

[0069] The conductive intervening member 50 of the fifth embodiment described above provides the same effects as the first embodiment. Furthermore, the number of electrical contacts with the first conductive member 11 can be increased or decreased in two stages: when the first conductive portion 52a of the first raised portion 52 contacts the contact surface 11a of the first conductive member 11, and when the first conductive portion 54a of the second raised portion 54 also contacts the contact surface 11a of the first conductive member 11. Therefore, by switching the fastening state of the bolt 13 and nut 14, the number of electrical contacts can be increased or decreased according to voltage, current, etc.

[0070] [Sixth Example] A sixth embodiment of this disclosure will be described with reference to Figure 15. The conductive intervening member 60 of the sixth embodiment has a metal, flat, plate-shaped body 61 and a circular through-hole 66 that penetrates the center of the plate-shaped body 61. The plate-shaped body 61 has a surface 61a and a back surface 61b that are substantially parallel to each other. The surface 61a side is provided with a plurality of first raised portions 62 and a plurality of second raised portions 64. The plurality of first raised portions 62 are each substantially the same shape and substantially the same raised height. The plurality of second raised portions 64 are each substantially the same shape and substantially the same raised height. The back surface 61b side is provided with a plurality of first recesses 63 and a plurality of second recesses 65. In the following description, only the parts that differ from the first and fifth embodiments will be described in detail.

[0071] As shown in Figure 15, the first conductive portion 62a, peripheral edge 62b, and connecting portion 62c of the first raised portion 62 are provided in the same position as the first conductive portion 52a, peripheral edge 52b, and connecting portion 52c of the first raised portion 52 of the fifth embodiment (see Figure 14), but with a shape shortened in the radial direction (left-right direction in the illustration). The second conductive portion 63a, bottom portion 63b, and connecting portion 63c of the first recess 63 are arranged on the back side in the thickness direction of the plate-shaped body 61, with shapes that follow the peripheral edge 62b, the first conductive portion 62a, and the connecting portion 62c, respectively. The first raised portion 62 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 62a and peripheral edge 62b. The first conductive portion 62a and the second conductive portion 63a are elastically in close contact with the curved contact surfaces 11a and 12a with high surface pressure.

[0072] As shown in Figure 15, the first conductive portion 64a, peripheral edge 64b, and connecting portion 64c of the second raised portion 64 are provided in the same position as the first conductive portion 54a, peripheral edge 54b, and connecting portion 54c of the second raised portion 54 of the fifth embodiment (see Figure 14), but with a shape that is elongated in the radial direction. The first conductive portion 64a is provided at approximately the same height as the first conductive portion 62a of the first raised portion 62. The second conductive portion 65a, bottom portion 65b, and connecting portion 65c of the second recess 65 are arranged on the back side in the thickness direction of the plate-shaped body 61, with shapes that follow the peripheral edge 64b, the first conductive portion 64a, and the connecting portion 64c, respectively. The second raised portion 64 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 64a and peripheral edge 64b. The spring force generated by the second raised portion 64 is smaller than that generated by the first raised portion 62. The first conductive portion 64a and the second conductive portion 65a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure.

[0073] As shown in Figure 15, the first raised portion 62 and the second raised portion 64 contact the contact surface 11a of the first conductive member 11 at their first conductive portions 62a and 64a at their tips, but do not contact the peripheral edges 62b and 64b or the connecting portions 62c and 64c. The first recess 63 and the second recess 65 contact the contact surface 12a of the second conductive member 12 at their second conductive portions 63a and 65a at their peripheral edges, but do not contact the bottom portions 63b and 65b or the connecting portions 63c and 65c. The conductive intervening member 60 of the sixth embodiment described above provides the same effects as the first embodiment. Furthermore, by providing multiple first raised portions 62 and multiple second raised portions 64 with different spring forces at different radial positions, the ease of assembly when fastening the bolt 13 and nut 14 to each other is improved.

[0074] [Seventh Example] A seventh embodiment of the present disclosure will be described with reference to Figure 16. The conductive intervening member 70 of the seventh embodiment has a metal, flat, plate-shaped body 71 and a circular through-hole 76 that penetrates the center of the plate-shaped body 71. The plate-shaped body 71 has a surface 71a and a back surface 71b that are substantially parallel to each other. The surface 71a side is provided with a plurality of first raised portions 72 and a plurality of second raised portions 74. The back surface 71b side is provided with a plurality of first recesses 73 and a plurality of second recesses 75. The plurality of first raised portions 72 are each substantially the same shape and have substantially the same height. The plurality of second raised portions 74 are each substantially the same shape and have substantially the same height. In the following description, only the parts that differ from the first embodiment will be described in detail.

[0075] As shown in Figure 16, the first conductive portion 72a, peripheral edge 72b, and connecting portion 72c of the first raised portion 72 are provided radially outward in a shape similar to the first conductive portion 3a, peripheral edge 3b, and connecting portion 3c of the raised portion 3 in the first embodiment (see Figure 5). The second conductive portion 73a, bottom portion 73b, and connecting portion 73c of the first recess 73 are arranged on the back side in the thickness direction of the plate-shaped body 71, with a shape similar to the peripheral edge 72b, the first conductive portion 72a, and the connecting portion 72c, respectively. At least a portion of each first conductive portion 72a and each second conductive portion 73a is located in the extension direction of the leg 13b relative to the head 13a of the bolt 13. The first raised portion 72 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 72a and peripheral edge 72b. The first conductive portion 72a and the second conductive portion 73a are formed in a curved shape and elastically make close contact with the contact surfaces 11a and 12a with high surface pressure.

[0076] As shown in Figure 16, the second raised portion 74 and the second recessed portion 75 are semi-mountain-shaped, which are half the radial shape of the first raised portion 72 and the first recessed portion 73. The first conductive portion 74a of the second raised portion 74 and the bottom portion 75b of the second recessed portion 75 are located on the outer peripheral edge of the through hole 76 at the radial inner end. The first conductive portion 74a is provided at approximately the same height as the first conductive portion 72a of the first raised portion 72. The peripheral edge 74b of the second raised portion 74 has a curved shape and is seamlessly connected to the surface 71a of the plate-shaped body 71. The connecting portion 74c seamlessly connects the first conductive portion 74a and the peripheral edge 74b. The connecting portion 74c is gradually inclined radially inward from the peripheral edge 74b toward the first conductive portion 74a. The second conductive portion 75a and the connecting portion 75c of the second recess 75 are arranged on the back side in the thickness direction of the plate-shaped body 71, with shapes that follow the peripheral edge 74b and the connecting portion 74c, respectively. The second raised portion 74 is elastically deformable mainly in the raised direction due to the curved structure of the first conductive portion 74a and the peripheral edge 74b. The first conductive portion 74a and the second conductive portion 75a are formed in a curved shape and elastically adhere closely to the contact surfaces 11a and 12a with high surface pressure.

[0077] As shown in Figure 16, the first raised portion 72 and the second raised portion 74 contact the contact surface 11a of the first conductive member 11 at their first conductive portions 72a and 74a at their tips, but do not contact at their periphery 72b and 74b or connecting portions 72c and 74c. The first recess 73 and the second recess 75 contact the contact surface 12a of the second conductive member 12 at their second conductive portions 73a and 75a at their periphery, but do not contact at their bottom portions 73b and 75b or connecting portions 73c and 75c. The conductive intervening member 70 of the seventh embodiment described above provides the same effects as the first embodiment. Furthermore, by providing a plurality of semi-mountain shaped second raised portions 74 at the radially inner end, the conductive intervening member 70 can receive a larger axial force when fastening the bolt 13 and nut 14 together.

[0078] [Eighth Example] An eighth embodiment of the present disclosure will be described with reference to Figure 17. The fastening structure 85 of the eighth embodiment is fastened by press-fitting rather than bolting. The fastening structure 85 fastens a cylindrical first conductive member 86, a conductive intervening member 80, and a flat plate-shaped second conductive member 87 to each other. The inner circumferential surface of the first conductive member 86 is provided with a contact surface 86a that contacts the conductive intervening member 80. The contact surface 87a of the second conductive member 87 faces the contact surface 86a and contacts the conductive intervening member 80. The conductive intervening member 80 has a flat plate-shaped metal body 81. Multiple raised portions 82 are provided that protrude from the surface of the plate-shaped body 81. Multiple recesses 83 are provided on the back side of the plate-shaped body 81. In the following description, only the parts that differ from the first embodiment will be described in detail.

[0079] As shown in Figure 17, the conductive intervening member 80 is inserted into the cylindrical interior of the first conductive member 86. The second conductive member 87 is press-fitted downwards toward the cylindrical interior of the first conductive member 86. Multiple raised portions 82 are provided, each having substantially the same shape and substantially the same height. The raised portions 82 extend elongated in a direction substantially perpendicular to the press-fitting direction. Multiple raised portions 82 are aligned in the press-fitting direction. A first conductive portion 82a, including a curved shape, is provided at the raised tip of the raised portion 82. The first conductive portion 82a extends straight in the direction of extension of the raised portion 82. The periphery of the raised portion 82 surrounds the first conductive portion 82a in an annular shape and is seamlessly connected to the plate-shaped body 81. The first conductive portion 82a is seamlessly connected to the periphery of the raised portion 82. The raised portion 82 tapers from its periphery toward the first conductive portion 82a.

[0080] As shown in Figure 17, each recess 83 is provided integrally with each raised portion 82 on both sides. The second conductive portion 83a on the periphery of the recess 83 is shaped to follow the periphery of the raised portion 82 and is positioned on the back side in the thickness direction of the plate-shaped body 81. The raised portion 82 is elastically deformable mainly in the raised direction by including a curved shape on its periphery and the first conductive portion 82a. The first conductive portion 82a and the second conductive portion 83a are formed in a curved shape and elastically make close contact with the contact surfaces 86a and 87a with high surface pressure. The first conductive portion 82a of the multiple raised portions 82 press against the contact surface 86a of the first conductive member 86. The second conductive portion 83a of the multiple recesses 83 press against the contact surface 87a of the second conductive member 87. According to the conductive intervening member 80 of the eighth embodiment described above, the same effect as in the first embodiment is achieved even in the case of a fastening structure 85 that is press-fitted rather than bolted.

[0081] [Ninth Example] A ninth embodiment of this disclosure will be described with reference to Figure 18. The fastening structure 95 of the ninth embodiment is also fastened by press-fitting, similar to the eighth embodiment. The fastening structure 95 fastens together a first conductive member 96 having a cylindrical hole, a conductive intervening member 90, and a cylindrical second conductive member 97. The inner circumferential surface of the first conductive member 96 is provided with a contact surface 96a that contacts the conductive intervening member 90. The outer circumferential surface of the second conductive member 97 includes a contact surface 97a that contacts the conductive intervening member 90. The conductive intervening member 90 is made of metal and has a ring-shaped plate-like body 91. Multiple raised portions 92 are provided that protrude radially outward from the outer circumferential surface of the plate-like body 91. Multiple recesses 93 are provided on the inner circumferential surface of the plate-like body 91. In the following description, only the parts that differ from the first and eighth embodiments will be described in detail.

[0082] As shown in Figure 18, the conductive intervening member 90 has a ring-shaped plate-like body 91 that is inserted into the first conductive member 96 so as to be aligned with the contact surface 96a of the inner circumferential surface of the first conductive member 96. The second conductive member 97 is press-fitted downwards in the figure so as to be inserted into the inner circumferential side of the conductive intervening member 90. Multiple raised portions 92 are provided, each having substantially the same shape and substantially the same height. The raised portions 92 extend elongated in the axial direction of the plate-like body 91, substantially parallel to the press-fitting direction. The multiple raised portions 92 are arranged in the circumferential direction of the plate-like body 91. A first conductive portion 92a, including a curved shape, is provided at the raised tip of the raised portion 92. The first conductive portion 92a extends straight in the direction of extension of the raised portion 92. The periphery of the raised portion 92 surrounds the first conductive portion 92a in an annular shape and is seamlessly connected to the plate-like body 91. The first conductive portion 92a is seamlessly connected to the periphery of the raised portion 92. The raised portion 92 tapers from its periphery toward the first conductive portion 92a.

[0083] As shown in Figure 18, each recess 93 is provided integrally with each raised portion 92 on both sides. The second conductive portion 93a on the periphery of the recess 93 is shaped to follow the periphery of the raised portion 92 and is positioned on the back side in the thickness direction of the plate-shaped body 91. The raised portion 92 is elastically deformable mainly in the raised direction (radially outward of the plate-shaped body 91) by including a curved shape on its periphery and the first conductive portion 92a. The first conductive portion 92a and the second conductive portion 93a are formed in a curved shape and elastically make close contact with the contact surfaces 96a and 97a with high surface pressure. The first conductive portion 92a of the multiple raised portions 92 press against the contact surface 96a of the first conductive member 96. The second conductive portion 93a of the multiple recesses 93 press against the contact surface 97a of the second conductive member 97. According to the conductive intervening member 90 of the ninth embodiment described above, the same effects as in the first embodiment are achieved even when the fastening structure 95 is used, similar to the eighth embodiment.

[0084] [Tenth Embodiment] A tenth embodiment of the present disclosure will be described with reference to Figure 19. The conductive intervening member 100 of the tenth embodiment has a C-shaped plate-like body 101 in side view, instead of the disc-shaped plate-like body 2 of the first embodiment. In the following description of the conductive member, only the parts that differ from the first embodiment will be described in detail.

[0085] As shown in Figure 19, the plate-shaped body 101 has a flat first plate-shaped portion 102 and a second plate-shaped portion 103. The first plate-shaped portion 102 and the second plate-shaped portion 103 are substantially parallel to each other and spaced apart at a predetermined interval in the thickness direction. The first plate-shaped portion 102 and the second plate-shaped portion 103 are connected in the thickness direction by an intermediate plate-shaped portion 104. The first plate-shaped portion 102 is provided with a substantially circular through hole 5, a plurality of raised portions 3 around it, and a plurality of recesses 4 that are integral to the front and back of the plurality of raised portions 3, similar to the first embodiment. The second plate-shaped portion 103 is provided with a through hole 105 at a position aligned with the through hole 5 in the thickness direction.

[0086] The first plate-shaped portion 102 of the plate-shaped body 101 is sandwiched between the first conductive member 11 and the second conductive member 12 (see Figure 2). The second plate-shaped portion 103 of the plate-shaped body 101 is located on the outer surface side of the first conductive member 11. In other words, the conductive intervening member 100 is assembled so that the first conductive member 11 is sandwiched between the first plate-shaped portion 102 and the second plate-shaped portion 103. Even when the plate-shaped body 101 includes a second plate-shaped portion 103 and an intermediate plate-shaped portion 104 that are not sandwiched between the first conductive member 11 and the second conductive member 12, the first plate-shaped portion 102 that is sandwiched between the first conductive member 11 and the second conductive member 12 is provided with a plurality of raised portions 3 and a plurality of recesses 4. Therefore, the conductive intervening member 100 of the 10th embodiment provides the same effects as the first embodiment.

[0087] Various modifications can be made to the conductive intervening members of the first to tenth embodiments described above. For example, fastening structures provided in plug-in hybrid vehicles and electric vehicles have been given as examples. However, the present disclosure can be applied to various electrical paths. In particular, applying the present disclosure to electrical paths carrying large currents will make the effect of reducing heat generation by reducing contact resistance even more pronounced. Furthermore, the present disclosure may be applied to fastening structures in environments where vibration can be transmitted. By maintaining the rigidity of the first and second conductive parts over the long term, the reduction in contact resistance due to wear caused by vibration can be suppressed over the long term.

[0088] The first conductive member 11 and the second conductive member 12 of the busbar are shown as examples. Alternatively, the first and second conductive members may be replaced with various conductive members that can accommodate a conductive intervening member and can be fastened to each other. For example, only one of the first or second conductive members may be used as the busbar. While the first and second conductive members are shown as a flat busbar, for example, only the fastening portion may be flat and the other power transmission portion may be cylindrical. The fastening structure is not limited to bolt fastening as in the 8th and 9th embodiments; it may also be a press-fit structure. The raised portion in the 8th and 9th embodiments may be raised in the opposite direction to that shown in the examples.

[0089] The raised and recessed portions may be formed by either drawing or stretching. Furthermore, if multiple shapes of raised and recessed portions are to be provided, some shapes may be formed by drawing and the remaining shapes by stretching. To further enhance the conductivity of the first and second conductive portions, the conductive intervening members may be plated or otherwise treated.

[0090] An example of a conductive intervening member having multiple protrusions and multiple recesses is provided. Alternatively, for example, one annular or linear protrusion and one recess that is integral to the front and back of the protrusion may be provided. In this case, one first conductive portion is provided along the shape of the protrusion, and a second conductive portion is provided on the periphery of the recess so as to surround the first conductive portion. An example of a configuration in which the first and second protrusions are spaced apart in the radial direction of the plate-shaped body is provided. Alternatively, for example, the first protrusions on the inner circumference and the second protrusions on the outer circumference may be arranged alternately in the circumferential direction, and the inner circumferential region where multiple first protrusions are arranged and the outer circumferential region where multiple second protrusions are arranged may overlap in the radial direction. A substantially circular through hole 5 is provided as an example, but it may also be an oval, rectangular, polygonal, or other shape through hole.

[0091] A manufacturing method for providing a conductive intervening member 1 is illustrated, in which the raised portions 3 and recessed portions 4 are formed first, and then the plate-shaped body 2 is formed. Alternatively, the plate-shaped body 2 may be formed first. First, a metal plate-shaped base material 6 is prepared. The plate-shaped base material 6 is punched or cut to form the plate-shaped body 2 of the conductive intervening member 1. The plate-shaped body 2 is drawn or stretched to form a plurality of raised portions 3 that protrude from the surface 2a of the plate-shaped body 2, and a plurality of recessed portions 4 that are recessed on the back surface 2b of the plate-shaped body 2, in conjunction with each of the plurality of raised portions 3. Thus, a conductive intervening member 1 having a plurality of raised portions 3 and a plurality of recessed portions 4 is formed. In this manufacturing method as well, the tips 3a of the raised portions 3 and the periphery 4a of the recessed portions 4 can be provided with high rigidity by drawing or stretching. Therefore, contact resistance can be reduced between the tip 3a of the raised portion 3 and the first conductive member 11, and between the periphery 4a of the recess 4 and the second conductive member 12, and this reduction in contact resistance can be maintained over the long term. [Explanation of Symbols]

[0092] 1…Conductive intervening member (first embodiment) 2...Plate-shaped body, 2a...Front surface, 2b...Back surface 3...Protuberant part, 3a...First conductive part (tip), 3b...periphery, 3c...connecting part 4…recess, 4a…second conductive part (periphery), 4b…bottom, 4c…connecting part 5…Through hole 6…Plate-shaped base material 7... Punch 8... Die 9… Wrinkle reduction 10…Fastening structure 11...First conductive member, 11a...Contact surface, 11b...Through hole 12...Second conductive member, 12a...Contact surface, 12b...Through hole 13... Bolt, 13a... Head, 13b... Leg 14...nut, 14a...threaded hole 20...Conductive intervening member (second embodiment) 21...Plate-shaped body, 21a...Front surface, 21b...Back surface 22...Raised portion, 22a...First conductive portion (tip), 22b...Periphery, 22c...Connecting portion 23...recess, 23a...second conductive part (periphery), 23b...bottom, 23c...connecting part 24…Through hole 30...Conductive intervening member (third embodiment) 31...Plate-shaped body, 31a...Front surface, 31b...Back surface 32...Raised portion, 32a...First conductive portion (tip), 32b...Periphery, 32c...Connecting portion 33...recess, 33a...second conductive part (periphery), 33b...bottom, 33c...connecting part 40...Conductive intervening member (4th embodiment) 41...Plate-shaped body, 41a...Front surface, 41b...Back surface 42...First raised portion, 42a...First conductive portion (tip), 42b...Periphery, 42c...Connecting portion 43...First recess, 43a...Second conductive part (periphery), 43b...Bottom, 33c...Connecting part 44...Second raised portion, 44a...First conductive portion (tip), 44b...Periphery, 44c...Connecting portion 45...Second recess, 45a...Second conductive part (periphery), 45b...Bottom, 45c...Connecting part 46…Through hole 50...Conductive intervening member (5th embodiment) 51...Plate-shaped body, 51a...Front surface, 51b...Back surface 52...First raised portion, 52a...First conductive portion (tip), 52b...Periphery, 52c...Connecting portion 53...First recess, 53a...Second conductive part (periphery), 53b...Bottom, 53c...Connecting part 54...Second raised portion, 54a...First conductive portion (tip), 54b...Periphery, 54c...Connecting portion 55...Second recess, 55a...Second conductive part (periphery), 55b...Bottom, 55c...Connecting part 56…Through hole 60...Conductive intervening member (6th embodiment) 61...Plate-shaped body, 61a...Front surface, 61b...Back surface 62...First raised portion, 62a...First conductive portion (tip), 62b...Periphery, 62c...Connecting portion 63...First recess, 63a...Second conductive part (periphery), 63b...Bottom, 63c...Connecting part 64...Second raised portion, 64a...First conductive portion (tip), 64b...Periphery, 64c...Connecting portion 65...Second recess, 65a...Second conductive part (periphery), 65b...Bottom, 65c...Connecting part 66…Through hole 70...Conductive intervening member (7th embodiment) 71...Plate-shaped body, 71a...Front surface, 71b...Back surface 72...First raised portion, 72a...First conductive portion (tip), 72b...Periphery, 72c...Connecting portion 73...First recess, 73a...Second conductive part (periphery), 73b...Bottom, 73c...Connecting part 74...Second raised portion, 74a...First conductive portion (tip), 74b...Periphery, 74c...Connecting portion 75...Second recess, 75a...Second conductive part (periphery), 75b...Bottom, 75c...Connecting part 76…Through hole 80...Conductive intervening member (8th embodiment) 81... Plate-shaped body 82...Protuberance, 82a...First conductive part (tip) 83…recess, 83a…second conductive portion (periphery) 85…Fascinating structure 86...First conductive member, 86a...Contact surface 87...Second conductive member, 87a...Contact surface 90...Conductive intervening member (9th embodiment) 91... Plate-shaped body 92...Protuberance, 92a...First conductive part (tip) 93...recess, 93a...second conductive portion (periphery) 95…Fascinating structure 96...First conductive member, 96a...Contact surface 97...Second conductive member, 97a...Contact surface 100...Conductive intervening member (10th embodiment) 101...Plate-shaped body 102...First plate-like part 103...Second plate-like part 104...Intermediate plate-like part 105…Through hole

Claims

1. A conductive intervening member sandwiched between a first conductive member and a second conductive member that are fastened together, A metal plate-shaped body, A raised portion that protrudes from the surface of the plate-shaped body, On the back surface of the plate-shaped body, there is a recess that is indented and integrated with the raised portion on both sides, The first conductive portion, which contacts the first conductive member at the tip of the raised portion and makes electrical contact with it, It has a second conductive portion that contacts and conducts electricity with the second conductive member at least at the periphery of the recess, A conductive intervening member wherein the first conductive portion is in pressure contact with the first conductive member and the second conductive portion is in pressure contact with the second conductive member when the first conductive member and the second conductive member are fastened together.

2. A conductive intervening member according to claim 1, The aforementioned raised portion is a conductive intervening member that is seamlessly connected from the periphery to the tip and is tapered.

3. A conductive intervening member according to claim 1 or 2, The raised portion is a conductive intervening member that elastically deforms while fastening the first conductive member and the second conductive member together.

4. A conductive intervening member according to claim 1 or 2, The plate-shaped body has through holes through which bolts for fastening the first conductive member and the second conductive member together can be inserted. The raised portion is a conductive intervening member positioned near the through hole such that it is located in the direction of extension of the bolt's leg relative to the bolt's head.

5. A method for manufacturing a conductive intervening member that is sandwiched between a first conductive member and a second conductive member that are fastened together, Prepare a metal plate-shaped base material, The plate-shaped base material is subjected to drawing or stretching to form a plurality of raised portions that protrude from the surface of the plate-shaped base material, and a plurality of recesses that are recessed on the back surface of the plate-shaped base material, which are integral to each of the plurality of raised portions. A manufacturing method for forming the conductive intervening member having the plurality of raised portions and the plurality of recesses by punching or cutting the plate-shaped base material.

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