JP2008041332A - Flexible bus bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible bus bar capable of preventing a flexible conductor part from being separated from a terminal part by improving tensile strength between the terminal part and the flexible conductor part even when a mounting bolt insertion hole passing even through the flexible conductor part is formed on the terminal part. <P>SOLUTION: The flexible bus bar 1 includes the flexible conductor part 2 formed of a braided wire and the terminal parts 3 formed of flat cylindrical conductive metal members arranged on both end parts of the flexible conductive part 2. A recessed part 51, which is projected to an inner surface of the cylindrical part of the terminal part 3 and deforms the flexible conductor part 2, is formed on one flat plane part 31 of the flat cylindrical part of the terminal part 3 so as to be in press-contact with a part longer than a half of a width of the flexible conductor part 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flexible bus bar. In particular, the present invention relates to a flexible bus bar used for wiring inside a vehicle such as an electric vehicle, a hybrid vehicle, or a train used under severe conditions.

  As shown in FIG. 7, the flexible bus bar 1 having flexibility includes a flexible conductor portion 2 formed of a conductive metal braided wire, and a flat cylindrical conductive conductor provided at both ends of the flexible conductor portion 2. And a terminal portion 3 made of a conductive metal member (see FIG. 3 of Patent Document 1).

  The flexible conductor portion 2 is configured by braiding many conductive wires. The terminal portion 3 is formed by press-molding a pipe made of a conductive metal material into a flat cylindrical shape, covers the braided wire with this conductive metal member, and terminals the flexible conductor portion 2 made of the braided wire by compression molding. Connected to part 3.

  The flexible bus bar 1 has an effect of absorbing a difference in thermal expansion by using it for connection between terminals having a large difference in thermal expansion or absorbing a vibration by using it for connection between terminals having a strong vibration. For example, it can be used as wiring in an engine room of an automobile.

JP 2002-362165 A

  By the way, the flexible conductor portion 2 is formed by compressing and deforming the terminal portion 3 in a state where the braided wire is covered with the flat cylindrical terminal portion, so that the terminal portion 3 does not come out of the terminal portion 3 with this compressive force. Connected.

  In addition, as shown in FIG. 7, the flexible bus bar 1 normally has a mounting bolt insertion hole 4 through which a mounting bolt is inserted through the terminal portion 3. The mounting bolt insertion hole 4 is formed by punching after the braided wire as the flexible conductor portion 2 is covered with the flat cylindrical terminal portion 3 and compression molded.

  Then, the mounting bolt is inserted into the mounting bolt insertion hole 4, and the terminal portion 3 of the flexible bus bar 1 is fastened to the mating connection portion.

  The flexible bus bar 1 is flexible when an external force such as vibration or impact of the mating connection part acts on the terminal part 3 when the terminal parts 3 at both ends thereof are fastened to the mating connection part with mounting bolts. The conductor portion 2 moves flexibly following the fluctuation.

  However, when this amount of fluctuation increases, a tensile force may act between the terminal portion 3 and the flexible conductor portion 2. If the tensile force is greater than the compressive force with which the terminal portion 3 compresses the flexible conductor portion 2, the flexible conductor portion 2 may come out of the terminal portion 3.

  In particular, when the mounting bolt insertion hole 4 is formed in the terminal portion 3, since the hole is also opened in the internal braided wire, the strands are lost, and the braided wire around this hole As the strength decreases, the compressive force also decreases, and the breakout easily occurs.

  The present invention improves the tensile strength between the terminal portion and the flexible conductor portion so that the flexible conductor portion is connected to the terminal portion even if the terminal portion has a mounting bolt insertion hole that also penetrates the flexible conductor portion. It aims at providing the flexible bus bar which can prevent coming off from a part.

  The present invention provides a flexible bus bar having a flexible conductor portion made of a conductive metal braided wire and terminal portions made of a flat cylindrical conductive metal member provided at both ends of the flexible conductor portion. A concave portion that protrudes toward the inner surface of the tubular portion of the terminal portion and deforms the flexible conductor portion is formed on one flat portion of the tubular portion so as to be in pressure contact with more than half of the width of the flexible conductor portion. It is characterized by being.

  Examples of the conductive metal braided wire of the flexible conductor portion include a braided tin-plated copper wire.

  For example, a tin-plated copper pipe can be used as the metal member constituting the terminal portion. In order to form the terminal portion in a flat cylindrical shape, it is obtained by continuously forming a circular pipe, then cutting it into a predetermined length, and pressing it so that the cross section becomes a flat rectangle. The terminal portion can also be formed in a flat cylindrical shape by bending a metal plate into a rectangular shape by press work.

  The deformation of the flexible conductor portion by the concave portion means, for example, that the flexible conductor portion is partially deformed by compressive deformation by the concave portion formed in one flat portion of the terminal portion and the other flat portion facing the concave portion. That means. By this compression deformation, the compressive force by which the terminal portion compresses the flexible conductor portion increases, and the tensile strength between the flexible conductor portion and the terminal portion can be improved.

  Moreover, the said recessed part will be in the state which protruded in the direction orthogonal to the tension | pulling direction of a flexible conductor part in the inner surface where the flexible conductor part of a terminal part is arrange | positioned. Since the flexible conductor portion is deformed in a direction perpendicular to the tensile direction by the convex portion on the inner surface side of the terminal portion, even if the convex portion is deformed in a direction perpendicular to the tensile direction of the flexible conductor portion. The flexible conductor portion is difficult to be removed from the terminal portion.

  In the present invention, it is possible to increase the compressive force by compressing and deforming the flexible conductor portion at the concave portion, and to deform the flexible conductor portion in a direction perpendicular to the tensile direction of the flexible conductor portion by the protrusion on the inner surface side of the concave portion. The tensile strength between the flexible conductor portion and the terminal portion is improved.

  In the flexible bus bar of the present invention, the concave portion may be formed so as to be pressed against half or more of the width of the flexible conductor portion with one concave portion, or a plurality of concave portions may be formed, and the width direction of each concave portion may be You may make it the sum total of length occupy half or more of the width | variety of a flexible conductor part. When a plurality of recesses are formed, the recesses can be dot-like recesses.

  Moreover, it is preferable that the said recessed part is a long groove formed near the opening edge part of the longitudinal direction center side of the flexible conductor part in a terminal part.

  Since the concave portion of the long groove is provided on the side where the tensile force acts on the terminal portion, a mounting bolt insertion hole through which the mounting bolt is inserted is formed through the terminal portion, and the wire of the flexible conductor portion is missing. Even if the strength of the flexible conductor portion around the mounting bolt insertion hole is reduced, the tensile strength between the terminal portion and the flexible conductor portion can be improved by the long groove recess.

  Note that a plurality of the long groove concave portions may be formed in the longitudinal direction of the flexible conductor portion.

  Further, when a long groove recess is formed in one flat surface portion, it protrudes toward the inner surface of the tubular portion of the terminal portion on the other flat surface portion of the flat tubular portion of the terminal portion, and is half the width of the flexible conductor portion. It is preferable to form a concave portion formed of a long groove that is in pressure contact.

  Thus, the compression force by the recessed part of a flexible conductor part can further be increased by forming a long groove recessed part also in the other plane part of a terminal part. In this case, if the long groove recesses formed in the respective flat portions are formed so as not to face each other, a large number of portions where the compressive force increases can be provided in the longitudinal direction of the flexible conductor portion, and the flexible conductor portion is corrugated. Thus, the tensile strength is improved. In addition, when these long groove recesses are provided so as to face each other, the force for compressing the flexible conductor portion of the terminal portion at the recess formation position is further increased, so that the tensile strength is further improved.

  Further, when the long groove recess is formed in one flat portion, the inner surface of the cylindrical portion of the terminal portion is located at the position facing the recess formed in the one flat portion on the other flat portion of the flat cylindrical portion of the terminal portion. You may make it form the elongate convex part extended in the width direction of the flexible conductor part which dents outward and the outer surface protrudes.

  In this case, the flexible conductor portion is deformed so as to wave in the direction of the convex portion with respect to the pulling direction due to the long groove concave portion and the convex portion provided opposite thereto. Due to the deformation of the flexible conductor portion in the direction orthogonal to the pulling direction, the flexible conductor portion is difficult to come off from the terminal portion.

  In addition, when forming a recessed part and a convex part in a long groove, it is preferable to form so that the groove width cross-sectional shape may become a trapezoid with a large opening part, or it may form so that it may become a circular arc. By adopting such a cross-sectional shape, even if the opening end of the concave portion or the convex portion abuts on the flexible conductor portion, damage is less likely to occur.

  When a long groove recess is formed in one flat portion, the other flat portion of the flat cylindrical portion of the terminal portion is positioned in the width direction of the flexible conductor portion at a position facing the recess formed in the one flat portion. An elongated hole extending may be formed.

  In this case, by deforming the flexible conductor portion in the direction orthogonal to the tensile direction by the long groove concave portion, the flexible conductor portion enters the inside of the hole, and the flexible conductor portion protrudes from the convex portion with respect to the tensile direction. Deforms to wave in the direction. Further, since a part of the flexible conductor portion enters the hole, the portion of the flexible conductor portion that enters the hole comes into contact with the opening of the hole, so that the flexible conductor portion becomes the terminal portion. It becomes difficult to come off. In addition, it is preferable to make the terminal part inner surface side opening edge part of the said hole into the state which rounded the corner or was chamfered. By thus forming the opening of the hole, it is possible to prevent damage to the flexible conductor.

  Furthermore, in the present invention, the concave portion may be a rectangular concave portion or a circular concave portion formed in the central portion of the flat portion of the terminal portion.

  Thus, by forming the rectangular or circular recess, the area for compressing the flexible conductor portion by the recess is increased, and the tensile strength of the flexible conductor portion can be improved.

  In particular, when a mounting bolt insertion hole is formed in the terminal portion, a rectangular or circular recess can be formed around the mounting bolt insertion hole, so that the strength of the flexible conductor portion around the mounting bolt insertion hole is increased. Even if it decreases, the tensile strength can be improved by increasing the compressive force.

  In the flexible bus bar of the present invention, a concave portion that protrudes toward the inner surface of the cylindrical portion of the terminal portion and deforms the flexible conductor portion on one flat surface portion of the flat cylindrical terminal portion has a width of the flexible conductor portion. It is formed so as to be in pressure contact with more than half. As a result, the concave portion can partially compress and deform the flexible conductor portion to increase the compressive force by the terminal portion of the flexible conductor portion and improve the tensile strength between the flexible conductor portion and the terminal portion. .

  Further, the concave portion protrudes in a direction orthogonal to the tensile direction of the flexible conductor portion on the inner surface where the flexible conductor portion of the terminal portion is disposed. Accordingly, the flexible conductor portion can be deformed in a direction orthogonal to the tensile direction by the convex portion on the inner surface side of the terminal portion, and therefore the deformation in the direction orthogonal to the tensile direction of the flexible conductor portion by the convex portion. This also makes it difficult to remove the flexible conductor portion from the terminal portion.

  Hereinafter, embodiments of a flexible bus bar of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the flexible bus bar of the present invention, FIG. 2 shows a second embodiment of the flexible bus bar of the present invention, and FIG. 3 shows a third embodiment of the flexible bus bar of the present invention. 4 shows a fourth embodiment of the flexible bus bar of the present invention, FIG. 5 shows a fifth embodiment of the flexible bus bar of the present invention, and FIG. 6 shows a sixth embodiment of the flexible bus bar of the present invention. Show.

(First embodiment)
As shown in FIG. 1, the flexible bus bar 1 of the first embodiment includes a flexible conductor portion 2 made of a conductive metal braided wire, and a flat cylindrical conductive metal plate provided at both ends of the flexible conductor portion 2. And a terminal portion 3 made of the same.

  In this embodiment, a braided wire braided with a tin-plated copper wire is used as the conductive metal braided wire of the flexible conductor portion 2.

  The terminal portion 3 is formed by continuously forming a copper circular pipe, then cutting it to a predetermined length, pressing it so that it has a flat cross section, and applying tin plating. Then, the braided wire that is the flexible conductor portion 2 is inserted into the cylindrical portion of the terminal portion 3 and pressed, and compression molding is performed until the terminal portion 3 and the flexible conductor portion 2 are completely integrated. By this compression molding, the flexible conductor portion 2 and the terminal portion 3 are connected in a pressed state. After the flexible conductor portion 2 and the terminal portion 3 are connected, a mounting bolt insertion hole 4 is formed through the terminal portion 3 by punching.

  Then, after the mounting bolt insertion hole 4 is formed through the terminal portion 3, it is pressed into one flat portion 31 of the flat cylindrical terminal portion 3 so as to protrude toward the inner surface of the cylindrical portion of the terminal portion 3. Then, the recess 51 for deforming the flexible conductor portion 2 is formed. The recess 51 is formed as a long groove extending over substantially the entire width of the flexible conductor portion 2, and is formed near the opening end of the terminal portion 3 on the center side in the longitudinal direction of the flexible conductor portion 2.

  In the case of forming the recess 51, as described above, the recess 51 may be formed by pressing after the compression molding of the terminal portion 3 and the flexible conductor portion 2, or the terminal portion 3 and the flexible conductor portion 2 may be formed. The recess 51 may be formed simultaneously with the compression molding. In the case where the concave portion 51 is formed at the same time as the compression molding, a convex portion corresponding to the concave portion is formed on the mold to be pressed.

  As shown in FIG. 1B, the groove width cross-sectional shape of the long groove recess 51 is formed so that the width of the opening is a trapezoid larger than the width of the bottom surface. Thus, by forming the trapezoidal cross section, it becomes difficult to form a corner portion in the portion protruding to the inner surface side of the terminal portion 3 of the concave portion 51, and damage at the contact portion between the flexible conductor portion 2 and the concave portion 51 is prevented. It becomes difficult to happen.

  In the present embodiment, the formation of the long groove concave portion 51 allows the flexible conductor portion 2 to be partially compressed and deformed by the long groove concave portion 51 and the other flat surface portion 32 in the terminal portion 3. By this compressive deformation, the compressive force by the terminal portion 3 of the flexible conductor portion 2 increases, and the tensile strength between the flexible conductor portion 2 and the terminal portion 3 is improved.

  The long groove recess 51 protrudes in a direction perpendicular to the tensile direction of the flexible conductor 2 on the inner surface of the terminal 3 where the flexible conductor 2 is disposed. The flexible conductor portion 2 is deformed in a direction orthogonal to the tensile direction by the convex portion on the inner surface side of the terminal portion 3. As a result, it is difficult for the flexible conductor portion 2 to come out of the terminal portion 3 even by deformation of the flexible conductor portion 2 in a direction perpendicular to the pulling direction of the convex portion.

  In the present embodiment, an increase in compressive force by partially compressing and deforming the flexible conductor portion 2 by the long groove recess 51 and a pulling of the flexible conductor portion 2 by the protrusion of the long groove recess 51 on the inner surface side of the terminal portion 3 are achieved. The tensile strength between the flexible conductor portion 2 and the terminal portion 3 is improved by deformation in the direction orthogonal to the direction.

  In particular, in this embodiment, the long groove recess 51 is provided near the opening on the side where the tensile force acts on the terminal portion 3, so that the mounting bolt insertion hole 4 is formed through the terminal portion 3, and this mounting bolt Even if the strength of the flexible conductor portion 2 around the insertion hole 4 decreases, the tensile strength can be improved by partial compression deformation by the long groove recess 51.

  The long groove recess 51 may be formed not only in one place as shown in FIG. 1 but also near the opening end on the opposite side of the terminal portion 3 with the mounting bolt insertion hole 4 interposed therebetween. The groove width can be narrowed and two or more grooves can be formed in parallel.

(Second embodiment)
In the second embodiment, as shown in FIG. 2, the terminal portion 3 of the first embodiment in which the long groove recess 51 is formed in one plane portion 31, and the other plane portion 32 is connected to the one plane portion 31. A long groove recess 52 having the same shape as that of the long groove recess 51 is formed at a position facing the formed long groove recess 51.

  The long groove recess 52 is also formed by pressing. Even when the long groove concave portion 51 and the long groove concave portion 52 are formed, the long groove concave portion 51 and the long groove concave portion 52 may be formed by pressing after the compression molding of the terminal portion 3 and the flexible conductor portion 2, or the terminal portion 3 The long groove concave portion 51 and the long groove concave portion 52 may be formed simultaneously with the compression molding of the flexible conductor portion 2.

  In the second embodiment, since the long groove recess 52 is also formed in the other flat surface portion 32 of the terminal portion 3 so that these recesses face each other, the flexible conductor portion 2 of the terminal portion 3 is compressed. The force is increased as compared with the case of the first embodiment, and the tensile strength can be further improved.

  In addition, you may make it form the long groove recessed part formed in each plane part alternately so that it may not mutually oppose. When the long groove recess is formed in this way, the flexible conductor 2 can be waved, so that the flexible conductor 2 is difficult to be removed from the terminal portion 3.

(Third embodiment)
In the third embodiment, as shown in FIG. 3, the terminal portion 3 of the first embodiment in which the long groove recess 51 is formed in one plane portion 31, and the other plane portion 32 in the one plane portion 31. At a position facing the formed long groove concave portion 51, a convex portion 53 having a long groove having the same shape as the long groove concave portion 51 is formed on the inner surface side.

  In the third embodiment, when the flexible conductor portion 2 is inserted into the terminal portion 3 and compression-molded by a press, the press die is a die in which the inverted shape of the long groove concave portion 51 and the convex portion 53 is formed. By compression molding, the long groove concave portion 51 and the convex portion 53 can be formed simultaneously with the compression molding.

  In the third embodiment, the long groove concave portion 51 and the convex portion 53 cause the flexible conductor portion 2 to be deformed so as to wave in the direction of the convex portion 53 with respect to the pulling direction. Due to the deformation in the direction orthogonal to the tensile direction, the flexible conductor portion 2 is difficult to come off from the terminal portion. The protrusion 53 also has a detent function to prevent rotation when the terminal portion 3 tries to rotate around the mounting bolt due to vibration or the like, and is prevented from rotating by being abutted against the mating connection portion. Have.

(Fourth embodiment)
In the fourth embodiment, as shown in FIG. 4, the terminal portion 3 of the first embodiment in which the long groove recess 51 is formed in one flat portion 31, and the other flat portion 32 is connected to the one flat portion 31. A long hole 54 having the same shape as the opening of the long groove recess 51 is formed at a position facing the formed long groove recess 51.

  In the fourth embodiment, the elongated hole 54 is formed in the terminal portion 3 before the flexible conductor portion 2 is inserted into the terminal portion 3 and compression-molded by pressing. At the same time as or after compression molding by inserting the flexible conductor portion 2 into the terminal portion 3, the long groove recess 51 is molded by pressing.

  In the fourth embodiment, the flexible conductor portion 2 can be deformed so as to enter the inside of the long hole 54 by deforming the flexible conductor portion 2 in the direction perpendicular to the tensile direction by the long groove recess 51. Further, since a part of the flexible conductor portion 2 enters the elongated hole 54, the portion of the flexible conductor portion 2 that has entered the elongated hole 54 comes into contact with the opening of the elongated hole 54. The flexible conductor portion 2 is difficult to be removed from the terminal portion 3.

  As a result, deformation of the flexible conductor portion 2 in the direction perpendicular to the pulling direction makes it difficult for the flexible conductor portion 2 to come out of the terminal portion 3. In addition, the terminal portion inner surface side opening end portion of the long hole 54 is rounded or chamfered to prevent the flexible conductor portion 2 from being damaged.

(Fifth embodiment)
In the fifth embodiment, as shown in FIG. 5, a rectangular recess 55 is formed in one flat surface portion 31 of the terminal portion 3. The rectangular recess 55 is formed so that the mounting bolt insertion hole 4 is positioned at the center.

  This rectangular recess 55 is also formed by pressing. Even when the rectangular recess 55 is formed, the rectangular recess 55 may be formed by pressing after the compression molding of the terminal portion 3 and the flexible conductor portion 2, or the terminal portion 3 and the flexible conductor portion 2 may be formed. The rectangular recess 55 may be formed simultaneously with the compression molding.

  In the fifth embodiment, by forming the rectangular recess 55, the flexible conductor portion 2 around the mounting bolt insertion hole 4 can be compressed by the rectangular recess 55. Therefore, the flexible conductor portion around the mounting bolt insertion hole Even if the strength of 2 decreases due to the missing wire, the compressive force can be increased to improve the tensile strength.

(Sixth embodiment)
In the sixth embodiment, as shown in FIG. 6, a circular recess 56 is formed in one flat surface portion 31 of the terminal portion 3. The circular recess 56 is formed so that the mounting bolt insertion hole 4 is located at the center.

  The circular recess 56 may also be formed by pressing after the compression molding of the terminal portion 3 and the flexible conductor portion 2, or may be formed simultaneously with the compression molding of the terminal portion 3 and the flexible conductor portion 2. Also good.

  In the sixth embodiment as well, by forming the circular recess 56, the flexible conductor portion 2 around the mounting bolt insertion hole 4 can be compressed by the circular recess 56. Therefore, the flexible conductor portion 2 around the mounting bolt insertion hole is Even if the strength is reduced due to the missing wire, the compressive force can be increased to improve the tensile strength.

  In each of the above-described embodiments, the number of braided wires connected to each terminal portion is one. However, a configuration in which a plurality of the braided wires are connected to the terminal portion in accordance with the current capacity and the size of the terminal portion. In this case, the recess can be formed.

  Further, in each of the above-described embodiments, when the insulation of the braided wire of the flexible conductor portion is necessary, an insulating material such as a heat-shrinkable tube can be covered, or the insulating material is covered as in each embodiment. It may be in a state where it is not.

  Further, the formation of the concave portion of the present invention can be applied not only to a flexible bus bar having a structure in which one terminal portion is provided for each braided wire, but also in a state where a plurality of braided wires are stacked, one end side is a terminal portion. The other end side can also be applied to a flexible bus bar in which a braided wire is branched and a terminal portion is connected to the end of each braided wire.

  The flexible bus bar of the present invention is suitable for use in wiring in an engine room of an automobile used under severe conditions.

It is 1st embodiment of the flexible bus bar of this invention, Comprising: (a) is a top view of the state to which the flexible conductor part was connected to one terminal part, (b) is X in terminal part (a). It is -X sectional drawing, (c) is sectional drawing at the time of cut | disconnecting the center of a terminal part in a longitudinal direction. It is 2nd embodiment of the flexible bus bar of this invention, Comprising: It is a fragmentary sectional view in the state where the flexible conductor part was connected to one terminal part. FIG. 5 is a partial cross-sectional view of a third embodiment of the flexible bus bar of the present invention in a state where a flexible conductor portion is connected to one terminal portion. It is 4th embodiment of the flexible bus bar of this invention, Comprising: It is a fragmentary sectional view in the state where the flexible conductor part was connected to one terminal part. It is 5th embodiment of the flexible bus bar of this invention, Comprising: (a) is a top view of the state to which the flexible conductor part was connected to one terminal part, (b) is Y in (a) of a terminal part. It is -Y sectional drawing. It is 6th embodiment of the flexible bus bar of this invention, Comprising: It is a top view in the state by which the flexible conductor part was connected to one terminal part. It is a perspective view of the conventional flexible bus bar.

Explanation of symbols

1 Flexible bus bar
2 Flexible conductor
3 Terminal part 31 One flat part 32 The other flat part
4 Mounting bolt insertion hole
51 Long groove recess 52 Long groove recess 53 Projection 54 Slot
55 Rectangular recess 56 Circular recess

Claims (7)

In a flexible bus bar having a flexible conductor portion made of a conductive metal braided wire and a terminal portion made of a flat cylindrical conductive metal member provided at both ends of the flexible conductor portion,
A concave portion that protrudes toward the inner surface of the cylindrical portion of the terminal portion and deforms the flexible conductor portion is pressed against more than half of the width of the flexible conductor portion on one flat surface portion of the flat cylindrical terminal portion. A flexible bus bar that is formed.   2. The flexible bus bar according to claim 1, wherein the concave portion is a long groove formed near an opening end portion on a central side in the longitudinal direction of the flexible conductor portion in the terminal portion.   The other flat portion of the flat cylindrical terminal portion is formed with a recess formed by a long groove that protrudes toward the inner surface of the cylindrical portion of the terminal portion and presses against more than half of the width of the flexible conductor portion. The flexible bus bar according to claim 2, wherein   A flexible conductor portion in which the inner surface of the cylindrical portion of the terminal portion is recessed outward and the outer surface protrudes at a position facing the concave portion formed in one of the flat portions of the flat cylindrical terminal portion. The flexible bus bar according to claim 2, wherein a long convex portion extending in the width direction is formed.   A long hole extending in the width direction of the flexible conductor portion is formed on the other flat portion of the flat cylindrical terminal portion at a position facing the concave portion formed on the one flat portion. The flexible bus bar according to claim 2.   The flexible bus bar according to claim 1, wherein the concave portion is a rectangular concave portion formed in a central portion of the flat portion of the terminal portion.   The flexible bus bar according to claim 1, wherein the concave portion is a circular concave portion formed in a central portion of the flat portion of the terminal portion.

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