JP6560889B2 - Electrical connection structure between negative battery post and body contact - Google Patents

Description

  The present invention relates to a structure for electrically connecting a negative electrode side battery post of a battery mounted on a vehicle and a body side contact portion provided on the body side of the vehicle.

  In FIG. 9, a battery 1 for supplying electric power is mounted on a vehicle such as an automobile disclosed in Patent Document 1 below. The battery 1 is formed in a box shape. On the terminal connection portion 2 located on the upper surface of the battery 1, a negative battery post 3 is formed so as to protrude. Reference numeral 4 in the figure indicates a vehicle body. A pedestal 5 for the battery 1 is formed on the body 4. The battery 1 is placed and fixed on the pedestal 5. A conductive earth plate 6 is fixed to a predetermined position of the body 4 (in the vicinity of the base 5). An earth terminal 8 provided at one end of the electric wire 7 is connected and fixed to the earth plate 6. The electric wire 7 has flexibility by covering a stranded conductor with an insulator. The other end of the electric wire 7 is provided with a terminal 9 that is a battery terminal. The terminal 9 is attached so as to be wound around the negative electrode side battery post 3.

  The negative electrode side battery post 3 and the ground plate 6 are electrically connected via the terminal 9, the electric wire 7, and the ground terminal 8. In other words, these constitute a ground circuit.

  Reference numeral 10 denotes a stud bolt. The stud bolt 10 is provided to temporarily engage the removed terminal 9 when the terminal 9 is removed from the negative battery post 3. Reference numeral 11 provided together with the stud bolt 10 indicates a hooking piece for hooking the terminal 9. In addition, the reference numeral 12 indicates a position at the back when viewed from the operator when the battery 1 is mounted or during maintenance.

JP 2010-120492 A

  In the above prior art, since the electric wire 7 is not rigid, if the electric wire 7 is shaken due to vehicle vibration or the like, there is a problem in that the peripheral device is interfered and damaged. In order to eliminate this problem, it is conceivable to add a protective member to the electric wire 7 for preventing the interference of the electric wire 7. However, due to the problem that the cost increases due to an increase in the number of parts, and the addition of the protective member. There is concern about the problem that the outer diameter is enlarged.

  Further, in the above prior art, since the electric wire 7 is not rigid, it is necessary to work while holding the ground terminal 8 and the terminal 9 at both ends when attaching the electric wire 7, and at the position 12 at the back, However, there is a problem that the work becomes difficult.

  The present invention has been made in view of the above-described circumstances, and provides an electrical connection structure between a negative-electrode side battery post and a body-side contact portion capable of preventing interference, reducing costs, improving workability, and the like. This is the issue.

The electrical connection structure of the negative battery side post according to the present invention and the body side contact portion according to the present invention, which has been made to solve the above problem, is a negative battery protruding from a terminal connection portion of a battery mounted on a vehicle. In a structure for electrically connecting a post and a body side contact portion provided on the vehicle body side, a conductive terminal attached to the negative battery post, and the terminal and the body side contact portion A conductive metal conductor for electrical connection, and the terminal includes a post mounting portion for the negative battery post, and a battery side contact portion formed in the vicinity of the post mounting portion. The metal conductor has at least a rigidity higher than that of the electric wire, and is disposed in the middle portion, and has a rigidity intermediate portion. A battery-side terminal portion and a body-side terminal portion that are integrally formed on one end side and the other end side of the portion, and further, the metal conductor has a shape-retaining property that allows the shape to be maintained as a whole. It is shaped to include, and the battery-side contacts and capable the battery-side terminal portion connected from the same direction relative to the body side contact portion and the body-side terminal section is disposed formed, and the battery-side A plurality of bendable bending portions that can be bent in the rigid intermediate portion are formed for absorbing a positional deviation between the contact portion and the body-side contact portion, and the rigid intermediate portion can be bent by the plurality of bending allowable portions. There characterized Rukoto is formed to be a plurality.

The present invention described in claim 2 is the electrical connection between the negative electrode side battery post and the body-side contact part according to claim 1, wherein the metal conductor, characterized in that the whole is formed in a crank shape .

The present invention is defined in claim 3, in electrical connection between the negative electrode side battery post and the body-side contact part according to claim 2, wherein the body-side contact part, disposed on the base flush with the battery forming It is characterized by being.

The present invention is defined in claim 4, in electrical connection with claim 1, 2 or the negative electrode side battery post and the body-side contact part according to 3, wherein the battery-side contact portion and the body-side contact part, A stud bolt protruding in the same direction as the negative battery post, and a nut assembled to the stud bolt; the battery side terminal portion and the body side terminal portion include a through hole for the stud bolt; and the nut And a contact contact surface disposed on the opposite side of the seat surface and in contact with the battery side contact portion and the body side contact portion.

  According to the first aspect of the present invention, the electrical connection between the negative battery side post and the body side contact portion is achieved using the conductive terminal attached to the negative battery post and the conductive metal conductor. The metal conductor has a shape retaining property as a whole, and the rigidity intermediate part constituting the metal conductor has higher rigidity than the electric wire, thereby preventing vibration due to vehicle vibration or the like. be able to. If the vibration can be prevented, interference with peripheral devices can be prevented, damage due to this interference can be prevented, and furthermore, no protection member is required to be added. You can also plan. Further, according to the present invention, since the metal conductor has shape retaining properties and higher rigidity than the electric wire, even if the electrical connection is at the back of the battery, it can be easily held with one hand, for example. It can be performed. Therefore, according to the present invention, it is possible to prevent interference, reduce costs, improve workability, and the like.

Moreover, according to this invention, in addition to the said effect, there exist the following effects further. That is, since the bendable portion that can be bent is provided at the rigid intermediate portion of the metal conductor, the battery side contact portion and the body side contact portion even if the metal conductor has shape retention and higher rigidity than the electric wire. There is an effect that it is possible to absorb the positional deviation.

According to the present invention described in claim 2 , in addition to the effect of claim 1, the following effect is further exhibited. That is, since the whole is a metal conductor formed in a crank shape, for example, it can be easily held with one hand, and the battery side contact part and the body side contact part are connected from the same direction. The effect that it can be made easy is produced.

According to the present invention described in claim 3 , in addition to the effect of claim 2 , the following effect is further exhibited. That is, since the body-side contact portion of the metal conductor is disposed and formed on the same plane as the battery pedestal, the metal conductor can be easily manufactured and can be easily handled.

According to the present invention described in claim 4, claim 1, 2 or more bring out the effects similar to the following in addition to the third effect. That is, for electrical connection, the metal conductor is moved along the protruding direction of the negative battery post, and the through holes of the battery terminal and body terminal of the metal conductor are connected to the battery contact and body. Each stud bolt of the side contact portion can be penetrated simultaneously. Therefore, there is an effect that workability can be improved. Then, if the nut is assembled to the stud bolt after the penetration, the battery side terminal portion and the body side terminal portion have the seat surface and the contact contact surface, so that the connection and fixing can be completed in a good state. There is an effect that can be done. In addition, according to the present invention, the metal conductor can be formed of only one component such as a metal rod, a metal pipe, a metal strip, and the like. That is, in the case of a metal rod, the battery side terminal portion and the body side terminal portion can be easily formed by simply crushing and punching both ends of the metal rod by press working. Therefore, there is an effect that the increase in the number of parts can be suppressed and the cost can be reduced.

FIG. 3 is a perspective view showing an electrical connection structure between a negative electrode side battery post and a body side contact portion of the present invention (Example 1). FIG. 2 is an exploded perspective view showing the electrical connection structure of FIG. 1 (Example 1). It is a figure which shows the electrical-connection structure of FIG. 1, (a) is a side view, (b) is a rear view (Example 1). (Example 2) which is an electrical connection structure of the negative electrode side battery post and body side contact part which becomes another example of this invention. FIG. 5 is an exploded perspective view showing the electrical connection structure of FIG. 4 (Example 2). It is a figure which shows the electrical-connection structure of FIG. 4, (a) is a side view, (b) is a rear view (Example 2). FIGS. 5A and 5B are diagrams for explaining the operation of the bending allowance portion in the rigid intermediate portion of FIG. 4, in which FIG. 4A is a side view when no positional deviation occurs between the battery side contact portion and the body side contact portion, and FIG. (Example 2). FIGS. 5A and 5B are diagrams for explaining the operation of the bending allowance portion in the rigid intermediate portion of FIG. 4, in which FIG. 4A is a rear view when no positional deviation occurs between the battery side contact portion and the body side contact portion, and FIG. (Example 2). It is a perspective view which shows the electrical connection structure of a prior art example.

  In order to electrically connect the negative side battery post of the battery mounted on the vehicle and the body side contact provided on the vehicle body side, a conductive terminal attached to the negative side battery post and a conductive And a metal conductor made of one part. The terminal has a battery side contact portion. The metal conductor has a rigid intermediate portion, and a battery-side terminal portion and a body-side terminal portion that are disposed and formed at both ends of the rigid intermediate portion. The metal conductor has shape retaining properties and is formed in a crank shape as a whole. The rigid intermediate part is formed in a part having at least higher rigidity than the electric wire. Further, when the metal conductor is moved along the protruding direction of the negative side battery post, the battery side terminal part and the body side terminal part can be simultaneously penetrated through the stud bolts of the battery side contact part and the body side contact part. It is formed in the part that can.

  Embodiment 1 will be described below with reference to the drawings. FIG. 1 is a perspective view showing an electrical connection structure between a negative electrode side battery post and a body side contact portion of the present invention. 2 is an exploded perspective view showing the electrical connection structure of FIG. 1, FIG. 3A is a side view showing the electrical connection structure of FIG. 1, and FIG. 3B is a rear view showing the electrical connection structure of FIG. It is. In addition, the arrow P in a figure shall show an up-down direction, the arrow Q shows the left-right direction, and the arrow R shows the front-back direction.

<About battery 21>
1 and 2, reference numeral 21 denotes a box-shaped battery that is mounted on a vehicle such as an automobile and supplies power to various places. In this embodiment, the battery 21 has a reference surface 21a as an upper surface, a surface 21b as a lower surface, surfaces 21c and 21d as side surfaces, a surface 21e as a front surface, and a surface 21f as a rear surface (front surface 21e). And the back surface 21f may be reversed). The upper surface 21 a of the battery 21 is formed as a terminal connection portion 22. The terminal connection portion 22 is provided with a positive battery post 23 projecting upward and a negative battery post 24. The positive electrode side battery post 23 and the negative electrode side battery post 24 have the same shape and are formed in a general shape having tapered side surfaces.

  A known terminal 25 is attached to the positive battery post 23. An electric wire 26 is provided at the terminal 25. For example, the electric wire 26 is connected to an electric connection box (relay box or the like) (not shown). In addition, the electric wire 26 of a present Example shall not have the problem regarding the shake | fluctuation by vehicle vibration etc.

<About body 27>
Reference numeral 27 denotes a metal body in the vehicle. Although not shown in detail here, the body 27 is formed in a general shape. A pedestal 28 for placing the battery 21 is disposed and formed on the body 27 (the pedestal 28 is also formed in a general shape). A body side contact portion 29 is disposed and formed at a predetermined position on the same plane as the base 28.

  The body-side contact portion 29 includes a stud bolt 30 that projects in the same direction as the positive-side battery post 23 and the negative-side battery post 24, and a nut 31 that is assembled to the stud bolt 30 (the configuration is an example). ). Although not particularly limited, the position where the body side contact portion 29 is formed indicates a position at the back as viewed from the operator.

<Electric connection structure between the negative battery side post 24 and the body side contact portion 29>
The electrical connection structure according to the present invention uses the conductive terminal 32 attached to the negative battery side post 24 and the conductive metal conductor 33 to electrically connect the negative battery post 24 and the body side contact portion 29. This is a structure for making a simple connection.

<About Terminal 32>
The terminal 32 includes a post mounting portion 34 and a battery side contact portion 35. The post attachment portion 34 is formed as an attachment portion for the negative electrode side battery post 24. The post attachment portion 34 is attached in a state of being wound around the negative battery side post 24. A known structure is employed for the post mounting portion 34. The battery side contact portion 35 is disposed and formed in the vicinity of the post mounting portion 34.

  The battery side contact portion 35 includes a stud bolt 36 protruding in the same direction as the negative electrode side battery post 24, a nut 37 assembled to the stud bolt 36, and a seat surface 38 (the configuration is an example). Suppose it is). Although not particularly illustrated, the terminal 32 is provided with a detent portion for the battery 21 in order to determine the position of the stud bolt 36.

<About the metal conductor 33>
1 to 3, the metal conductor 33 is made of a single component having conductivity, and is formed using, for example, a metal rod or metal pipe having a circular cross section as a base material (in addition to a metal strip plate). An example of using a metal strip as a base material will be described later in Example 2). The metal conductor 33 includes a rigid intermediate portion 39, and a battery side terminal portion 40 and a body side terminal portion 41 that are disposed at both ends of the rigid intermediate portion 39.

  In the metal conductor 33, the battery side terminal portion 40 and the body side terminal portion 41 are formed by crushing and punching both ends of the base material by pressing. The battery side terminal portion 40 and the body side terminal portion 41 are formed to be bent at 90 degrees with respect to the rigid intermediate portion 39. Further, the battery side terminal portion 40 is formed so as to protrude in a direction different from the body side terminal portion 41 by 180 degrees. The entire metal conductor 33 is formed in a crank shape.

  The rigid intermediate portion 39 is formed at least in a portion having higher rigidity than the electric wire 7 (see FIG. 9) (the rigid intermediate portion 39 of the present embodiment is made of the above-described base material and thus has high rigidity. Of course). The metal conductor 33 including such a rigid intermediate portion 39 has shape retention so that overall shape retention is possible. The rigid intermediate portion 39 is also formed in a shape that is easy for an operator to hold.

  Since the battery-side terminal portion 40 and the body-side terminal portion 41 are crushed and punched by pressing, a through hole 42 for the stud bolts 36 and 30, a seat surface 43 for the nuts 37 and 31, and this seat A contact contact surface 44 that is disposed on the opposite side of the surface 43 and contacts the battery side contact portion 35 and the body side contact portion 29.

  The metal conductor 33 is formed so that the height dimension from the battery side terminal part 40 to the body side terminal part 41 matches the height dimension from the battery side contact part 35 to the body side contact part 29. In addition, the battery-side contact portion 35 and the battery-side terminal portion 40 are arranged and formed on the metal conductor 33 so that the metal conductor 33 is positioned with respect to the battery-side contact portion 35 and the body-side contact portion 29. In the metal conductor 33, the battery side terminal portion 40 and the body side terminal portion 41 are arranged and formed so that they can be connected to the battery side contact portion 35 and the body side contact portion 29 from the same direction.

<About electrical connection work by workers>
In the above-described configuration and structure, after the terminal 32 is attached to the negative electrode side battery post 24, the metal conductor 33 is moved from the top to the bottom by holding the rigid intermediate portion 39 of the metal conductor 33 or the battery side terminal portion 40. (When moved along the protruding direction of the negative battery post 24), the through holes 42 of the battery side terminal portion 40 and the body side terminal portion 41 of the metal conductor 33 become the battery side contact portion 35 and the body side contact portion. 29 stud bolts 36 and 30 are simultaneously penetrated. When the nuts 37 and 31 are assembled to the stud bolts 36 and 30, a series of electrical connections are completed.

<Summary and effect of the present invention>
As described above with reference to FIGS. 1 to 3, the present invention relates to the negative side battery post 24 of the battery 21 mounted on the vehicle, and the body side contact portion 29 provided on the body 27 side of the vehicle. In order to electrically connect the two, a conductive terminal 32 attached to the negative battery post 24 and a conductive metal conductor 33 made of one component.

  The terminal 32 includes a battery-side contact portion 35, and the metal conductor 33 includes a rigid intermediate portion 39, and a battery-side terminal portion 40 and a body-side terminal portion 41 that are disposed and formed at both ends of the rigid intermediate portion 39. . The metal conductor 33 has a shape retaining property and is formed in a crank shape as a whole. The rigid intermediate portion 39 is formed in a portion having high rigidity, and the battery-side terminal portion 40 and the body-side terminal portion 41 move the battery-side contact portion 35 and the body side when the metal conductor 33 is moved from the top to the bottom. It is formed in the part which can be simultaneously penetrated with respect to each stud bolt 36, 30 of the contact part 29.

  According to the electrical connection structure of the present invention, the metal conductor 33 as a whole has shape retention, and the rigid intermediate portion 39 has high rigidity, so that vibration due to vehicle vibration or the like can be prevented. If vibration can be prevented, interference with peripheral devices can be prevented, and damage due to this interference can also be prevented. Furthermore, since there is no need to add a protective member if there is no worry about damage, the cost can be reduced.

  Further, according to the electrical connection structure of the present invention, as described above, the metal conductor 33 has shape retention and high rigidity, so that even if the electrical connection is at the back of the battery 21, for example, You can easily work with one hand.

  Therefore, according to the electrical connection structure of the present invention, it is possible to prevent interference, reduce costs, improve workability, and the like.

  Embodiment 2 will be described below with reference to the drawings. FIG. 4 is a perspective view showing an electrical connection structure between a negative electrode side battery post and a body side contact portion as another example of the present invention. 5 is an exploded perspective view showing the electrical connection structure of FIG. 4, FIG. 6A is a side view showing the electrical connection structure of FIG. 4, and FIG. 6B is a rear view showing the electrical connection structure of FIG. It is. Further, FIGS. 7 and 8 are operation explanatory views of the bending allowance portion in the rigid intermediate portion of FIG. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

<About the metal conductor 33>
4 to 6, the second embodiment is obtained by changing the base material of the metal conductor 33 of the first embodiment. That is, the metal conductor 33 of Example 2 is formed using a metal strip as a base material. In the second embodiment, a bending allowance portion 45 is added to the rigid intermediate portion 39 in accordance with the base material change. That is, the metal conductor 33 is formed to include the rigid intermediate portion 39 having the bending allowance portion 45, and the battery side terminal portion 40 and the body side terminal portion 41 disposed at both ends of the rigid intermediate portion 39. .

  The metal conductor 33 is formed with a battery side terminal portion 40 and a body side terminal portion 41 by bending and punching both end portions of the base material. The battery side terminal portion 40 and the body side terminal portion 41 are formed to be bent at 90 degrees with respect to the rigid intermediate portion 39. Further, the battery side terminal portion 40 is formed so as to protrude in a direction different from the body side terminal portion 41 by 180 degrees. The entire metal conductor 33 is formed in a crank shape.

<About the bending allowable part 45>
The bending allowance portion 45 is formed as a bendable portion. The reason why the bendable part is formed is to absorb a positional deviation (with respect to the battery 21) between the battery side contact part 35 and the body side contact part 29. The bending permission portion 45 of this embodiment is formed by twisting the rigid intermediate portion 39. Specifically, twisting is performed so that the front and back surfaces of the rigid intermediate portion 39 are directed in the front-rear direction in the drawing, and the front and back surfaces of the central portion are directed in the left-right direction in the drawing. Formed.

  Of course, the bending allowable portion 45 can be formed even when the base material is the case of the first embodiment. That is, a portion having the same function as the bending allowance portion 45 can be formed by crushing from the front-rear direction and the left-right direction.

<About electrical connection work by workers>
In the above configuration and structure, after the terminal 32 is attached to the negative battery post 24, the metal conductor 33 is held by the rigid intermediate portion 39 of the metal conductor 33 or the battery side terminal portion 40. Are moved along the projecting direction (from top to bottom), the through holes 42 of the battery-side terminal portion 40 and the body-side terminal portion 41 of the metal conductor 33 are connected to the battery-side contact portion 35 and the body-side contact portion. 29 stud bolts 36 and 30 are simultaneously penetrated. When the nuts 37 and 31 are assembled to the stud bolts 36 and 30, a series of electrical connections are completed.

  When the battery 21 is not in the normal position shown in FIGS. 7A and 8A but is shifted to the state shown in FIGS. 7B and 8B, the bending allowance portion 45 is moved. This can be dealt with if the rigid intermediate portion 39 is bent by the angle θ.

<Summary and effect of the present invention>
As described above with reference to FIGS. 4 to 8, the present invention of the second embodiment is the same as that of the first embodiment. That is, in order to electrically connect the negative side battery post 24 of the battery 21 mounted on the vehicle and the body side contact portion 29 provided on the body 27 side of the vehicle, the conductive property attached to the negative side battery post 24 is electrically connected. This is an electrical connection structure including a terminal 32 and a metal conductor 33 made of a single component.

  The terminal 32 has a battery side contact portion 35, and the metal conductor 33 has a rigid intermediate portion 39 having a bending allowance portion 45, a battery side terminal portion 40 disposed on both ends of the rigid intermediate portion 39, and the body side. Terminal portion 41. The metal conductor 33 has a shape retaining property and is formed in a crank shape as a whole. The rigid intermediate portion 39 is formed in a portion having a high rigidity in addition to the bending allowance portion 45, and when the battery side terminal portion 40 and the body side terminal portion 41 move the metal conductor 33 from the top to the bottom, The battery side contact portion 35 and the body side contact portion 29 are formed at portions that can be penetrated simultaneously with respect to the stud bolts 36 and 30.

  According to the electrical connection structure of the present invention, the metal conductor 33 as a whole has shape retention, and the rigid intermediate portion 39 has high rigidity, so that vibration due to vehicle vibration or the like can be prevented. If vibration can be prevented, interference with peripheral devices can be prevented, and damage due to this interference can also be prevented. Furthermore, since there is no need to add a protective member if there is no worry about damage, the cost can be reduced.

  Further, according to the electrical connection structure of the present invention, as described above, the metal conductor 33 has shape retention and high rigidity, so that even if the electrical connection is at the back of the battery 21, for example, You can easily work with one hand.

  Therefore, according to the electrical connection structure of the present invention, it is possible to prevent interference, reduce costs, improve workability, and the like.

  In addition, according to the electrical connection structure of the present invention of the second embodiment, the metal conductor 33 has a shape retaining property and a high rigidity because the metal conductor 33 has the bendable bending portion 45 at the rigid intermediate portion 39. Even if it has, the position shift with the battery side contact part 35 and the body side contact part 29 can be absorbed. Therefore, there is an effect that workability can be further improved.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 21 ... Battery, 22 ... Terminal connection part, 23 ... Positive electrode side battery post, 24 ... Negative electrode side battery post, 25 ... Terminal, 26 ... Electric wire, 27 ... Body, 28 ... Base, 29 ... Body side contact part, 30 ... Stud Bolt, 31 ... Nut, 32 ... Terminal, 33 ... Metal conductor, 34 ... Post mounting part, 35 ... Battery side contact part, 36 ... Stud bolt, 37 ... Nut, 38 ... Seat surface, 39 ... Rigid intermediate part, 40 ... Battery side terminal part, 41 ... Body side terminal part, 42 ... Through-hole, 43 ... Seat surface, 44 ... Contact contact surface, 45 ... Bending allowance part

Claims (4)

In the structure for electrically connecting the negative side battery post protruding from the terminal connection part of the battery mounted on the vehicle and the body side contact part provided on the body side of the vehicle,
A conductive terminal attached to the negative battery post, and a conductive metal conductor for electrically connecting the terminal and the body side contact portion;
The terminal has a post mounting portion for the negative battery post, and a battery side contact portion arranged and formed in the vicinity of the post mounting portion,
The metal conductor has at least higher rigidity than that of the electric wire and has a rigid intermediate portion that is disposed and formed in an intermediate portion; a battery-side terminal portion that is integrally disposed and formed on one end side and the other end side of the rigid intermediate portion; Body side terminal part,
Further, the metal conductor is formed in a shape having shape retaining properties that allows the shape to be retained as a whole, and can be connected to the battery side contact portion and the body side contact portion from the same direction. The battery-side terminal portion and the body-side terminal portion are arranged and formed , and a plurality of bending allowance portions that can be bent at the rigid intermediate portion are formed to absorb misalignment between the battery-side contact portion and the body-side contact portion. And
Said rigid intermediate unit, electrical connection between the negative electrode side battery post and the body-side contact part, wherein a direction in which the bendable said by the plurality of bending allowable part Ru is formed to be a plurality. In the electrical connection structure of the negative electrode side battery post and the body side contact portion according to claim 1,
The metal conductor, electrical connection between the negative electrode side battery post and the body-side contact part, characterized in that the whole Ru is formed into a crank shape. In the electrical connection structure of the negative electrode side battery post and the body side contact portion according to claim 2 ,
The body-side contact portion is disposed and formed on the same plane as the pedestal of the battery . The electrical connection structure between the negative-side battery post and the body-side contact portion. In the electrical connection structure of the negative electrode side battery post and the body side contact portion according to claim 1, 2, or 3,
The battery side contact portion and the body side contact portion have a stud bolt protruding in the same direction as the negative electrode side battery post and a nut assembled to the stud bolt, and the battery side terminal portion and the body side terminal The portion has a through hole for the stud bolt, a seat surface for the nut, and a contact contact surface that is disposed on the opposite side of the seat surface and contacts the battery side contact portion and the body side contact portion. An electrical connection structure between the negative battery post and the body contact .

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