JP2016131094A - Fuse unit and method for assembling fuse unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuse unit capable of suppressing a load acting on a battery post, and a method for assembling the fuse unit.SOLUTION: A fuse unit 1 comprises: a fusible link 2 in which a fuse element blows out when overcurrent flows; a holding mechanism 3 including a base part 31 interposed between a post erecting surface 105 of a battery housing 101 and the battery terminal 110 in a state in which the battery terminal 110 is fastened to a battery post 102 provided on the post erecting surface 105, and a holding part 32 linked to the base part 31 and holding the fusible link 2 on the post erecting surface 105; and a connection member 5 connecting the fusible link 2 and the battery terminal 110 and including a misregistration amount absorption structure 5h absorbing a dimensional misregistration amount between the connection position between the connection member and the fusible unit 2 and the connection position between the connection member and the battery terminal 110 on the connection member side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuse unit and a fuse unit assembling method.

  As a conventional fuse unit mounted in a vehicle or the like, for example, in Patent Document 1, a power supply side terminal connected to a bolt standing on a battery terminal, a load side terminal connected to a load terminal, and a power supply side Covering the conductor by exposing the connection part between the power source side terminal and the other terminal of the load side terminal, and the conductor integrally formed in a flat plate shape with the fusible body provided across the terminal and the load side terminal A fuse unit having a resin cover is disclosed.

JP 2013-037949 A

  Incidentally, the fuse unit described in Patent Document 1 is configured to be directly attached to, for example, a battery terminal. When such a battery terminal is fastened to a battery post, a load acting on the battery post is used. There is room for further improvement in terms of restraint.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a fuse unit and a fuse unit assembling method capable of suppressing a load acting on a battery post.

  In order to achieve the above object, a fuse unit according to the present invention is provided on a post standing surface of a battery housing, which is connected to a battery terminal and melts a fusible body when an overcurrent flows. A base portion interposed between the post standing surface and the battery terminal in a state where the battery terminal is fastened to the battery post, and is connected to the base portion to hold the fusible link on the post standing surface. A holding mechanism having a holding portion; electrically connecting the fusible link and the battery terminal; and a dimension between a connection position of the fusible link and a connection position of the battery terminal. And a connection member having a connection member side shift amount absorbing structure for absorbing the shift amount.

  In the fuse unit, the connection member has a long hole formed along an orthogonal direction orthogonal to the axial direction of the battery post, and the fusible link side or the battery terminal is formed in the long hole. The protrusions formed on the side are connected by being inserted, and the connecting member side displacement absorbing structure can be constituted by the elongated holes.

  Further, in the fuse unit, the fusible link has a rotation permissible support portion that rotatably supports the connection member about a rotation axis along the axial direction of the battery post, and the rotation permissible support portion. Constitutes a fusible link side displacement amount absorbing structure that absorbs a dimensional displacement amount between a connection position between the connection member and the fusible link and a connection position between the connection member and the battery terminal. Can be.

  Further, in the fuse unit, the connection member includes a fusible link side connection portion connected to the fusible link, a terminal side connection portion connected to the battery terminal, and an axial direction of the battery post. Extending and connecting the fusible link side connection portion and the terminal side connection portion, and having a bending allowance portion that allows bending along the axial direction, the connecting member side displacement amount absorbing structure, It can be comprised by a bending | flexion allowance part.

  In the fuse unit, the connecting member is orthogonal to the fusible link side connecting portion connected to the fusible link, the terminal side connecting portion connected to the battery terminal, and the axial direction of the battery post. A first bending allowance portion extending along the orthogonal direction and allowing bending along the orthogonal direction, the fusible link side connection portion and one end of the first bending allowance portion connected to each other along the axial direction. A second bendable portion that allows bending, and a third bendable portion that connects the terminal-side connecting portion and the other end of the first bendable portion and allows bending along the axial direction. The connecting member side displacement amount absorbing structure may be configured by the first bending allowance portion, the second bend allowance portion, and the third bend allowance portion.

  In the fuse unit, a plurality of the connection members may be stacked in the axial direction of the battery post.

  In the fuse unit, the battery terminal side of the connection member is temporarily fastened to the battery terminal, and a terminal side temporary fastening fastener for final fastening, and the fusible link side of the connection member is connected to the fuse unit. A fusible link side fastener for final fastening to the fusible link can be provided.

  Further, in the fuse unit, the holding portion is formed along an orthogonal direction orthogonal to the axial direction of the battery post and defines an accommodating space portion that accommodates the fusible link, and the fusible link is orthogonally crossed. A side wall that can be guided along the direction to the housing space, and an axial end of the side wall that contacts the fusible link housed in the housing space and And a restriction claw portion for restricting movement along the axial direction.

  The fuse unit may include a regulation mechanism that regulates movement of the fusible link accommodated in the accommodation space along the orthogonal direction.

  In order to achieve the above object, a fuse unit according to the present invention is provided on a post standing surface of a battery housing, which is connected to a battery terminal and melts a fusible body when an overcurrent flows. A base portion interposed between the post standing surface and the battery terminal in a state where the battery terminal is fastened to the battery post, and is connected to the base portion to hold the fusible link on the post standing surface. A holding mechanism having a holding portion, wherein the holding portion is formed along an orthogonal direction orthogonal to the axial direction of the battery post and defines an accommodation space portion for accommodating the fusible link, and the fusible A side wall capable of guiding the link along the orthogonal direction to the accommodating space, and an end of the side wall in the axial direction; And having a regulating claw portion for regulating movement along the axial direction of the fusible link in contact with the fusible links that are housed in the space portion.

  In order to achieve the above object, a fuse unit assembling method according to the present invention is provided on a post standing surface of a battery housing, which is connected to a battery terminal and melts a fusible body when an overcurrent flows. A base portion interposed between the post standing surface and the battery terminal in a state where the battery terminal is fastened to the battery post, and a fusible link connected to the base portion to the post standing surface. A holding mechanism having a holding portion for holding, electrically connecting the fusible link and the battery terminal, and a dimension between a connection position with the fusible link and a connection position with the battery terminal A fuse unit comprising a connecting member having a structure for absorbing the amount of misalignment on the connecting member side before the connecting member A terminal side temporary fastening step of temporarily fastening the battery terminal side to the battery terminal with a terminal side temporary fastening combined fastener, and a terminal side temporary fastening combined fastening of the connection member after the terminal side temporary fastening step. A connecting member assembling step of assembling the fusible link side of the connecting member to the fusible link in a state of being temporarily tightened to the battery terminal by a tool, and the connecting member and the terminal side after the connecting member assembling step After the terminal assembly step of interposing another terminal between the temporary fastening and fastener, and the terminal assembly step, the terminal side temporary fastening and fastener, and the fusible link side of the connecting member And a final fastening step of final fastening a fusible link side fastener for final fastening to the fusible link.

  In the fuse unit and the fuse unit assembling method according to the present invention, the fusible link is held on the post standing surface of the battery housing by the holding portion connected to the base portion of the holding mechanism, and the fuse standing on the post standing surface. The load acting on the battery terminal from the fuse unit can be suppressed by receiving the load of the bull link. As a result, this fuse unit and the fuse unit assembling method have an effect that the load acting on the battery post can be suppressed.

FIG. 1 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the first embodiment is applied. FIG. 2 is an exploded perspective view illustrating a schematic configuration of the fuse unit according to the first embodiment. FIG. 3 is a plan view illustrating a schematic configuration of the fuse unit according to the first embodiment. FIG. 4 is a partial cross-sectional perspective view of the fuse unit according to the first embodiment. FIG. 5 is a partial cross-sectional view including the fuse unit regulating mechanism according to the first embodiment. FIG. 6 is a perspective view illustrating a schematic configuration of a connecting bus bar of the fuse unit according to the first embodiment. FIG. 7 is a flowchart illustrating an example of a method for assembling the fuse unit according to the first embodiment. FIG. 8 is a perspective view illustrating a schematic configuration of a connecting bus bar of a fuse unit according to a modification. FIG. 9 is a partial cross-sectional view including a restricting mechanism for a fuse unit according to a modification. FIG. 10 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the second embodiment is applied. FIG. 11 is a perspective view illustrating a schematic configuration of a connecting bus bar of the fuse unit according to the second embodiment. FIG. 12 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the third embodiment is applied. FIG. 13 is a flowchart illustrating an example of a method for assembling a fuse unit according to the third embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment 1]
FIG. 1 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the first embodiment is applied. FIG. 2 is an exploded perspective view illustrating a schematic configuration of the fuse unit according to the first embodiment. FIG. 3 is a plan view illustrating a schematic configuration of the fuse unit according to the first embodiment. FIG. 4 is a partial cross-sectional perspective view of the fuse unit according to the first embodiment. FIG. 5 is a partial cross-sectional view including the fuse unit regulating mechanism according to the first embodiment. FIG. 6 is a perspective view illustrating a schematic configuration of a connecting bus bar of the fuse unit according to the first embodiment. FIG. 7 is a flowchart illustrating an example of a method for assembling the fuse unit according to the first embodiment. FIG. 8 is a perspective view illustrating a schematic configuration of a connecting bus bar of a fuse unit according to a modification. FIG. 9 is a partial cross-sectional view including a restricting mechanism for a fuse unit according to a modification. Note that FIG. 2 schematically shows a fuse element and a stud bolt that are actually embedded in the housing by insert molding in order to make the explanation easy to understand.

  In the following description, a direction along the central axis X1 of the battery post 102 is referred to as an axial direction. Typically, the axial direction is a direction along the vertical direction in a state where the battery 100 is mounted on a vehicle or the like, and a post standing surface 105 of the battery casing 101 described later typically has a battery casing. This corresponds to the upper surface of the body 101 in the vertical direction. Also, here, in order to make the following explanation easy to understand, for convenience, one of two orthogonal directions orthogonal to the axial direction is set to the long side direction (first width direction), and the other is set to the short side direction (second direction). Width direction). The axial direction (Z direction) as the first direction, the long side direction (X direction) as the second direction, and the short side direction (Y direction) as the third direction are orthogonal to each other.

  As shown in FIGS. 1, 2, and 3, the fuse unit 1 according to the present embodiment is applied to a battery terminal 110 connected to a battery 100 mounted on a vehicle or the like, and is used for overcurrent protection of an electrical circuit. It is what

  First, the battery 100 and the battery terminal 110 to which the fuse unit 1 is applied will be described with reference to FIGS. 1, 2, and 3.

  The battery 100 is mounted, for example, as a power storage device in a vehicle or the like. The battery 100 includes a battery casing 101 that houses battery fluid and various components that constitute the battery 100, a battery post 102 provided on the battery casing 101, and the like. The battery casing 101 includes a substantially rectangular box-shaped casing main body 103 with one of the surfaces open, and a lid member 104 that closes the opened surface, and has a substantially rectangular parallelepiped shape as a whole. It is formed. Here, the battery casing 101 has a long side in the direction along the long side direction and a short side in the direction along the short side direction, but is not limited thereto. The battery post 102 is made of conductive lead or the like, and is erected on the post erecting surface 105 of the lid member 104. The post standing surface 105 is a surface on which the battery post 102 is erected in the battery casing 101. Here, the post standing surface 105 is, for example, a surface (vertical upper surface) in the vertical direction of the lid member 104 constituting the battery housing 101 in a state where the battery 100 is mounted on a vehicle or the like. The post standing surface 105 is the entire upper surface in the vertical direction of the lid member 104, including the bottom surface of the recess 106 described later. The battery post 102 has a substantially cylindrical shape, and is erected so as to protrude on the post erecting surface 105 in such a positional relationship that the central axis X <b> 1 is orthogonal to the post erecting surface 105. More specifically, the battery post 102 of this embodiment is erected in a recess 106 formed in the vicinity of a corner position of the post erection surface 105. The concave portion 106 is a portion that is depressed into a substantially rectangular shape near the angular position of the post standing surface 105. The battery post 102 is erected in the recess 106. The battery post 102 is typically tapered such that its diameter decreases as it advances toward the tip end in the axial direction. That is, the battery post 102 has a tapered shape in which the outer diameter at the distal end is smaller than the outer diameter at the proximal end.

  Note that the battery post 102 and the recess 106 are provided in a pair so as to form a pair of an anode and a cathode with respect to the long side direction, and the pair of recesses 106 communicate with each other via the communication recess 107. The communication recess 107 is formed along the edge of the lid member 104 in the long side direction. In the following description, a case where the fuse unit 1 is applied to the battery terminal 110 provided on the battery post 102 on the anode side will be described, but the present invention is not limited to this. The battery 100 is installed at a predetermined position of the vehicle via an installation tray 108 provided on the lower side in the vertical direction.

  The battery terminal 110 is attached to the battery post 102 to electrically connect the battery 100 and a metal fitting such as the terminal 115 provided at the end of the electric wire 114 on the main body side of the vehicle or the like on which the battery 100 is mounted. It is a part to do. The battery terminal 110 includes a main body portion 111, a stud bolt 112, and a tightening portion 113. In the main body 111, for example, an annular portion 111a, a bolt holding portion 111b, and the like are integrally formed by press bending a conductive metal plate. The annular portion 111a is formed with a post insertion hole 111c into which the battery post 102 is inserted and a slit 111d continuous with the post insertion hole 111c. The post insertion hole 111c is formed in a substantially circular shape and corresponds to the taper of the battery post 102 described above on the inner peripheral wall surface so that each inner peripheral surface contacts the battery post 102 in a state where the battery post 102 is inserted. It has a taper. The bolt holding portion 111b is a portion that holds the stud bolt 112 by being bent in a state where the stud bolt 112 is inserted into the bolt insertion hole 111e, for example. The stud bolt 112 is electrically conductive, and is electrically connected to a metal fitting such as the terminal 115 provided at the end of the electric wire 114 to the shaft portion exposed from the bolt insertion hole 111e while being held by the bolt holding portion 111b. (See FIG. 1, FIG. 3, etc.). The fastening portion 113 fastens the annular portion 111a to the battery post 102 in a state where the battery post 102 is inserted into the post insertion hole 111c. The tightening portion 113 includes, for example, a bolt and a nut, and is assembled to the main body portion 111 in such a positional relationship that the bolt crosses the above-described slit 111d. Then, the tightening portion 113 fastens the battery terminal 110 to the battery post 102 by tightening the annular portion 111a by screwing the nut to the tip portion of the bolt.

  The fuse unit 1 of this embodiment is in the battery 100 in which the battery terminal 110 is fastened to the battery post 102 as described above, and the holding mechanism in which the base portion 31 and the holding portion 32 are integrally formed. The protector 3 is used to hold the fusible link 2 on the post standing surface 105, here, the upper surface in the vertical direction of the battery casing 101, thereby suppressing the load acting on the battery post 102.

  Specifically, as shown in FIGS. 1, 2, 3, 4, 5, and 6, the fuse unit 1 includes a fusible link 2 and a protector 3 as a holding mechanism. Furthermore, the fuse unit 1 of the present embodiment includes a locking mechanism 4 and a connecting bus bar 5 as a connecting member.

  The fusible link 2 is connected to the battery terminal 110, and the fusible body (fuse) 21c is blown when an overcurrent flows. The fusible link 2 includes a fuse element 21 provided with a fusible body 21 c, a stud bolt 22 connected to the fuse element 21, and a resin housing 23 that supports the fuse element 21.

  The fuse element 21 is a conductive plate-like conductor, and is constituted by a metal bus bar. The fuse element 21 includes a power supply side terminal 21a connected to the battery terminal 110 via the connecting bus bar 5 and the like, a plurality of load side terminals 21b connected to the load terminals, a power supply side terminal 21a, and each load side terminal 21b. Each soluble body 21c provided across the two is integrally formed in a flat plate shape. Each load side terminal 21b has various shapes according to the shape of the load terminal and the like. Each fusible body 21c is electrically connected to the power supply side terminal 21a and each load side terminal 21b. Each fusible body 21c has, for example, a configuration in which a low melting point metal chip is welded to a band-shaped conductive portion having a narrow width, and melts when an overcurrent flows, thereby blocking the corresponding current path. Here, the overcurrent of the fusible body 21c is, for example, a current exceeding a preset rating. That is, each fusible body 21c is blown when a current exceeding a preset rating flows. The rated current of each fusible element 21c is determined according to the current of the circuit to be protected. The power supply side terminal 21a and each load side terminal 21b are each provided with a bolt mounting hole and a connector connection shape. For example, a stud bolt 22 is joined to the bolt mounting hole. Here, the fuse element 21 includes one power source side terminal 21a, five load side terminals 21b, and four fusible bodies 21c.

  Each stud bolt 22 has conductivity, and is electrically connected to a load terminal of the external circuit, the connecting bus bar 5 and the like.

  The housing 23 is a block-like body that is formed of an insulating resin material and supports and covers the fuse element 21 and the stud bolt 22. In the fusible link 2 of this embodiment, for example, a fuse element 21 and a stud bolt 22 are embedded in the housing 23 and integrated by insert molding or the like. The fusible link 2 is formed in a substantially rectangular box shape as a whole.

  In the fusible link 2, the position of each fusible body 21 c is covered with a transparent cover member 24 made of resin, and each fusible body 21 c can be visually observed through the transparent cover member 24.

  The protector 3 holds the fusible link 2 on the post standing surface 105. The protector 3 has a base portion 31 and a holding portion 32, which are integrally formed of an insulating resin material.

  The base portion 31 is a portion interposed between the post standing surface 105 and the battery terminal 110 in a state where the battery terminal 110 is fastened to the battery post 102 provided on the post standing surface 105 of the battery housing 101. . The base portion 31 is provided around the battery post 102. Here, the base portion 31 is formed in a substantially rectangular plate shape, and a post insertion hole 31a into which the battery post 102 is inserted is formed. The post insertion hole 31a is formed to be sufficiently larger than the battery post 102 in consideration of tolerances allowed for the battery 100 or the like. The base 31 is formed in a size and shape that can be placed in the recess 106 of the post standing surface 105 in a state where the battery post 102 is inserted into the post insertion hole 31a. The base portion 31 may be configured to include a post insertion notch through which the battery post 102 can penetrate instead of the post insertion hole 31a.

  The holding portion 32 is connected to the base portion 31 and holds the fusible link 2 on the post standing surface 105. The holding part 32 has a bottom surface 32a formed in a substantially rectangular plate shape, and a side wall 32b erected so as to surround the periphery of the bottom surface 32a, and these are integrated into a tray shape (dish shape). It is formed. The side wall 32b is directed to one side in the axial direction, here, in a state where the protector 3 is assembled on the post standing surface 105 of the battery 100 (hereinafter, sometimes simply referred to as “assembled state”). It is set up so as to protrude. The side wall 32b is provided on three sides of the four sides of the bottom surface 32a, and is provided so as to surround three sides of the bottom surface 32a. Here, the side wall 32b is one of two sides along the short side direction of the bottom surface 32a and two sides along the long side direction (here, a side located on the back side with respect to the side surface of the battery 100). In addition, they are formed along an orthogonal direction (short side direction or long side direction) orthogonal to the axial direction. Each side wall 32b may be cut out at a predetermined location according to, for example, the shape of a terminal or connector connected to the fusible link 2.

  In the holding part 32, an accommodation space part 32c for accommodating and holding the fusible link 2 is defined by the bottom face 32a and the side wall 32b. The accommodation space 32 c opens upward in the vertical direction in a state where the protector 3 is assembled on the post standing surface 105 of the battery 100. The accommodation space 32c is formed in a size and shape into which the fusible link 2 is fitted. The accommodation space 32c is formed with a slide opening 32d on the surface where the side wall 32b is not provided, that is, on one surface in the short side direction. The slide opening 32d is an opening for slidingly inserting the fusible link 2 into the accommodating space 32c along the orthogonal direction (here, the short side direction). When the fusible link 2 is slid into the accommodating space 32c through the slide opening 32d, each side wall 32b inserts the fusible link 2 in the orthogonal direction (here, the short side direction). It functions as a wall surface that can be guided to 32c.

  Furthermore, the holding part 32 has a regulation claw part 32e that abuts the fusible link 2 accommodated in the accommodation space part 32c and regulates the movement of the fusible link 2 along the axial direction. The restricting claw portion 32e is formed at the end of the side wall 32b in the axial direction. At least one restricting claw portion 32e may be provided, but here, a total of two restricting claws 32e are provided, one on each of the side wall 32b along the long side direction and one on the side wall 32b along the short side direction. Each restricting claw 32e is formed at the axial tip of each side wall 32b (upper end in the vertical direction in the assembled state). Each restricting claw portion 32e is formed in a shape such that the axial front end portion of each side wall 32b is bent toward the accommodation space portion 32c along the orthogonal direction (short side direction or long side direction).

  The fusible link 2 described above accommodates the holding portion 32 while being guided by the side walls 32b along the orthogonal direction (short side direction) via the slide opening 32d as shown in FIGS. By being inserted into the space 32c by sliding, it is assembled to the housing space 32c. And the holding | maintenance part 32 contact | abuts the predetermined position in the outer edge part of the housing 23 of the fusible link 2 in the state in which the fusible link 2 was accommodated in the accommodation space part 32c, and was fitted. Thus, the fusible link 2 can be held in the accommodation space 32c.

  Further, as shown in FIGS. 4 and 5, the fuse unit 1 according to the present embodiment moves along the orthogonal direction (here, the short side direction) of the fusible link 2 accommodated in the accommodation space portion 32 c. A regulation mechanism 6 for regulating is provided. Here, two restriction mechanisms 6 are provided, two on the bottom surface 32a side of the holding part 32 and one on the restriction claw part 32e side along the short side direction, but at least one is provided. That's fine. Each regulation mechanism 6 of the present embodiment includes a regulation recess 6a provided on one side of the holding part 32 or the fusible link 2, and a regulation convex part provided on the other side of the holding part 32 or the fusible link 2. 6b. Here, in each regulation mechanism 6, each regulation recess 6 a is provided in the holding portion 32, and each regulation projection 6 b is provided in the fusible link 2.

  Specifically, each regulating recess 6a is formed in a recessed shape in the vicinity of the slide opening 32d on the side facing the accommodation space 32c in the bottom surface 32a and the regulation claw 32e. The two restriction recesses 6a formed on the bottom surface 32a are formed at positions adjacent to the respective side walls 32b along the short side direction, and the restriction recess 6a formed on the restriction claw portion 32e is formed on the bottom surface 32a. It is formed at a position facing one of the two restricting recesses 6a (the restricting recess 6a on the base portion 31 side) in the axial direction. Each restricting convex portion 6b is formed in a protruding shape at a position facing each restricting concave portion 6a in the housing 23 of the fusible link 2 in a state where the fusible link 2 is accommodated in the accommodating space portion 32c. Each regulation convex part 6b is formed including the inclined surface 6c and the contact surface 6d. The inclined surface 6c is formed on the front side in the slide insertion direction of the fusible link 2 in the restriction recess 6a, and the contact surface 6d is formed on the rear side in the slide insertion direction in the restriction recess 6a.

  Each restricting mechanism 6 configured as described above has each restricting convex portion when the fusible link 2 is slid into the accommodating space portion 32c along the orthogonal direction (short side direction) via the slide opening 32d. Each regulating projection 6b moves into each regulating recess 6a when the inclined surface 6c of 6b abuts on a predetermined part of the bottom surface 32a of the holding part 32 and the regulating claw part 32e and bends the part. In each regulation mechanism 6, each regulation projection 6b moves into each regulation recess 6a, and the contact surface 6d of each regulation projection 6b abuts on the inner wall surface of each regulation recess 6a in a fitted state. Thereby, the movement along the orthogonal direction (short side direction) of the fusible link 2 accommodated in the accommodating space 32c, typically, the movement to the side opposite to the slide insertion side can be restricted. .

  Returning to the description of the protector 3 again. The holding portion 32 of the present embodiment configured as described above is formed integrally with the base portion 31 so as to be adjacent to the base portion 31 in the long side direction. The holding part 32 extends vertically downward so that the side wall 32b on the base part 31 side corresponds to the step formed by the recess 106 on the post standing surface 105, and is continuous with the base part 31 at the lower end of the side wall 32b. To do. The holding part 32 is a state in which the protector 3 is assembled to the battery 100 in such a positional relationship that the battery post 102 is inserted into the post insertion hole 31 a of the base part 31 and the base part 31 is located in the recess 106. Thus, at least a part of the fusible link 2 is positioned on the post standing surface 105, and the fusible link 2 is placed and held on the post standing surface 105. In the assembled state, the holding portion 32 is placed with the back side of the bottom surface 32 a (the surface opposite to the accommodation space portion 32 c) abutting against the post standing surface 105. Therefore, the protector 3 receives the load of the fusible link 2 on the post standing surface 105 via the holding portion 32.

  The locking mechanism 4 locks the protector 3 configured as described above on the post standing surface 105. The locking mechanism 4 of the present embodiment includes locking claw portions 41 and 42 that lock the protector 3 on the post standing surface 105 by engaging with the battery casing 101. A plurality of locking claw portions 41, 42 are provided here, and are engaged with a plurality of surfaces of the battery casing 101, here, two surfaces orthogonal to each other in the battery casing 101. The locking claw portions 41 and 42 are formed integrally with the base portion 31 and the holding portion 32 of the protector 3 via plate-like portions (arm portions) 41a and 42a extending in the vertical direction in the assembled state. Is done. The plate-like portions 41 a and 42 a extend downward in the vertical direction from the base portion 31 and the holding portion 32 in the assembled state, and are formed integrally with the base portion 31 and the holding portion 32.

  The locking claw portion 41 and the plate-like portion 41a are side surfaces along the long side direction of the lid member 104 of the battery housing 101 in the assembled state, here, the concave portion 106 formed on the post standing surface 105 of the lid member 104. It is formed at a position facing the side surface along the long side direction in the vicinity. The locking claw portion 41 and the plate-like portion 41 a are formed to extend along the long side direction across the base portion 31 and the holding portion 32. The locking claw portion 42 and the plate-like portion 42a are side surfaces along the short side direction of the lid member 104 of the battery casing 101 in the assembled state, here, the concave portion 106 formed on the post standing surface 105 of the lid member 104. It is formed at a position facing the side surface along the short side direction in the vicinity. The locking claw portion 42 and the plate-like portion 42 a are formed to extend along the short side direction in the base portion 31.

  The locking claws 41 and 42 are bent at the tips of the plate-like portions 41a and 42a (the ends on the lower side in the vertical direction when the protector 3 is assembled on the post standing surface 105 of the battery 100), respectively. A hook or a hook is formed. Here, the locking claws 41 and 42 engage with the vertical lower end surface of the edge of the lid member 104 in the battery housing 101. The locking mechanism 4 is configured such that the locking claws 41 and 42 engage with a predetermined position on the lower end surface in the vertical direction of the lid member 104 in a state where the protector 3 is assembled on the post standing surface 105 of the battery 100. Thus, the protector 3 can be locked and locked on the post standing surface 105.

  As shown in FIGS. 1, 2, 6, etc., the connecting bus bar 5 is a conductive plate-like conductor that electrically connects the fuse element 21 of the fusible link 2 and the battery terminal 110. It is. Here, the connection bus bar 5 is composed of a single plate-like conductor. The connecting bus bar 5 is a plate-shaped metal bus bar, and a step portion 5 a is formed so as to correspond to a step due to the concave portion 106 on the post standing surface 105. The connecting bus bar 5 is formed with a flat plate portion 5b as a fusible link side connection portion and a flat plate portion 5c as a terminal side connection portion at both ends of the step portion 5a. In the state where the connecting bus bar 5 is assembled to the fusible link 2 and the battery terminal 110, the flat plate portion 5b extends from the end on the upper side in the vertical direction of the stepped portion 5a to the fusible link 2 side along the long side direction. The flat plate portion 5c extends from the lower end portion of the stepped portion 5a in the vertical direction toward the battery terminal 110 along the long side direction. In other words, in the connecting bus bar 5, the step portion 5a connects the flat plate portion 5b and the flat plate portion 5c. The flat plate portion 5b and the flat plate portion 5c are both disposed so as to face the post standing surface 105. The flat plate portion 5 b is formed with a bolt hole 5 d and connected to the fusible link 2. The flat plate portion 5 c is formed with a bolt hole 5 e and connected to the battery terminal 110. In the connecting bus bar 5, the stud bolt 22 of the power supply side terminal 21a is inserted into the bolt hole 5d and the nut 5f is fastened, and the stud bolt 112 of the battery terminal 110 is inserted into the bolt hole 5e and the nut 5g is fastened. The stud bolt 22 of the power supply side terminal 21a and the stud bolt 112 of the battery terminal 110 are electrically connected.

  Further, the connecting bus bar 5 of the present embodiment further includes a dimensional shift amount between the connection position with the fusible link 2 and the connection position with the battery terminal 110 (hereinafter simply referred to as “dimensional shift amount”). A displacement amount absorbing structure 5h serving as a connecting member side displacement amount absorbing structure that absorbs. The “dimensional shift amount” is the positional tolerance of the connection position of the connecting bus bar 5 to the fusible link 2, the positional tolerance of the connection position of the connecting bus bar 5 to the battery terminal 110, or the dimensional tolerance between the connection positions. Although it is preferable to be within the above range, cases where the tolerance is larger than these tolerances can also be included. The displacement amount absorbing structure 5h is typically a structure for absorbing the amount of displacement in the dimensions described above according to the tolerances of the battery 100, the battery terminal 110, the fusible link 2, the protector 3, and the like. Here, in the connecting bus bar 5, a bolt hole 5d as a long hole and a stepped portion 5a as a deflection allowing portion constitute a displacement amount absorbing structure 5h.

  The bolt hole 5d is formed as a long hole (for example, an oval or elliptical hole) along an orthogonal direction orthogonal to the axial direction, here, a long side direction in which the fusible link 2 and the battery terminal 110 are arranged. Thus, the shift amount absorbing structure 5h is configured. The connecting bus bar 5 is a fusible link by inserting the stud bolt 22 of the power supply side terminal 21a as the protrusion formed on the fusible link 2 side as described above into the bolt hole 5d formed as a long hole. 2 fuse elements 21. Thereby, the bolt hole 5d functions as a shift amount absorbing structure 5h for absorbing a shift amount in dimension with respect to the long side direction. That is, the connecting bus bar 5 is connected to both the fusible link 2 and the battery terminal 110 in the long side direction between the connection position with the fusible link 2 and the connection position with the battery terminal 110. The amount of deviation in the dimension is configured to be absorbed by the bolt hole 5d constituting the deviation amount absorbing structure 5h.

  The step portion 5a extends along the axial direction, connects the flat plate portion 5b and the flat plate portion 5c, and allows bending along the axial direction. Here, the connecting bus bar 5 is formed such that the stepped portion 5a intersects the axial direction, and the stepped portion 5a is formed to be bent at an acute angle with respect to the flat plate portions 5b and 5c. That is, the connecting bus bar 5 is formed to have a substantially Z shape when viewed along the side (short side direction). The connecting bus bar 5 can be deformed by bending in the axial direction (vertical direction) by forming the stepped portion 5a and bending the stepped portion 5a along the axial direction. In other words, the connecting bus bar 5 is bent in a direction in which the angle formed between the stepped portion 5a and the flat plate portions 5b and 5c is reduced, whereby the axial width of the connecting bus bar 5 (distance between the flat plate portions 5b and 5c). Is configured to be reduced. Further, the connecting bus bar 5 is bent in a direction in which the angle formed by the stepped portion 5a and the flat plate portions 5b and 5c is increased, thereby increasing the axial width of the connecting bus bar 5 (distance between the flat plate portions 5b and 5c). It is comprised so that it can be made to. Thereby, the said level | step-difference part 5a functions as the deviation | shift amount absorption structure 5h for absorbing the deviation | shift amount on the dimension with respect to an axial direction. That is, the connecting bus bar 5 is connected in the axial direction between the connection position with the fusible link 2 and the connection position with the battery terminal 110 in a state where the connection bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. The dimensional deviation amount is configured to be absorbed by the step portion 5a constituting the deviation amount absorbing structure 5h.

  In addition, the fusible link 2 of the present embodiment, as shown in FIGS. 1, 2, and 3, is between the connection position of the connecting bus bar 5 and the fusible link 2 and the connection position of the battery terminal 110. A displacement amount absorbing structure 2a is provided as a fusible link side displacement amount absorbing structure that absorbs the dimensional displacement amount. That is, the fuse unit 1 also has a deviation amount absorbing structure 2a on the fusible link 2 side. Here, the fusible link 2 has a rotation allowable support portion 23a, and the rotation allowable support portion 23a constitutes a deviation amount absorbing structure 2a. The rotation allowable support portion 23a is a portion that is formed in the housing 23 of the fusible link 2 and rotatably supports the connecting bus bar 5 with the rotation axis along the axial direction as a rotation center. The rotation-allowing support portion 23a is formed in a concave shape in the housing 23 in the vicinity of the stud bolt 22 of the power-side terminal 21a as a protrusion. The stud bolt 22 of the power supply side terminal 21a is erected in a recessed area that constitutes the rotation allowable support portion 23a. The rotation-allowing support portion 23a has an opening 23b formed on one side of the housing 23 in the long side direction, here, on the side where the battery terminal 110 is located, and gradually toward the opening 23b. Is formed to include a widened portion 23c whose width extends along the line. The connecting bus bar 5 is assembled to the stud bolt 22 of the power supply side terminal 21a in such a positional relationship that the flat plate portion 5b is accommodated in the rotation allowable support portion 23a. And when the connection bus bar 5 rotates with the axis of the stud bolt 22 as the rotation axis, the rotation permission support portion 23a can permit the rotation of the connection bus bar 5 within the range of the spreading portion 23c. Thereby, the said rotation permissible support part 23a functions as the shift amount absorption structure 2a for absorbing the shift amount on the dimension with respect to the short side direction. That is, the fusible link 2 is connected to the connecting bus bar 5 and the fusible link 2 in a state where the connecting bus bar 5 is connected to both the fusible link 2 and the battery terminal 110, and the connecting bus bar 5 and the battery. It is configured such that the amount of deviation in the dimension in the short side direction with respect to the connection position with the terminal 110 can be absorbed by the rotation allowable support portion 23a constituting the deviation amount absorbing structure 2a.

  Here, the assembly | attachment of the connection bus bar 5 comprised as mentioned above is demonstrated. The connecting bus bar 5 is connected to the fusible link 2 and the battery terminal 110 in a state where the fusible link 2, the protector 3, and the battery terminal 110 are assembled to the battery 100, and is fixed by the nut 5f and the nut 5g. In the fuse unit 1, one of a nut 5 f as a fusible link side fastener and a nut 5 g as a terminal side fastener is a temporary fastening / fastening tool. Here, in the fuse unit 1, the nut 5f is temporarily fastened to the fusible link 2 for fastening the plate 5b on the fusible link 2 side of the connecting bus bar 5 to the fusible link 2. For example, the nut 5g is constituted by a normal nut for finally fastening the flat plate portion 5c on the battery terminal 110 side of the connection bus bar 5 to the battery terminal 110. Hereinafter, a method for assembling the fuse unit 1, particularly a method for assembling the connecting bus bar 5, will be described with reference to the flowchart of FIG. 7.

  First, the worker performs the connecting bus bar installation step (FL side) in a state where the fusible link 2, the protector 3, and the battery terminal 110 are assembled to the battery 100, and the flat plate portion 5b of the connecting bus bar 5 on the fusible link 2 side. Then, the connecting bus bar 5 is assembled to the fusible link 2 side so that the stud bolt 22 of the power supply side terminal 21a is inserted into the bolt hole 5d formed in (5).

  Next, the worker temporarily fastens the flat plate portion 5b on the fusible link 2 side of the connecting bus bar 5 to the fusible link 2 with a nut 5f constituted by a nylon nut as a FL side temporary fastening step (step ST2).

  Next, as a connecting bus bar assembling step (terminal side), the operator temporarily tightens the flat plate portion 5b on the fusible link 2 side of the connecting bus bar 5 to the fusible link 2 to the battery terminal 110 side of the connecting bus bar 5. The connecting bus bar 5 is assembled to the battery terminal 110 side so that the stud bolt 112 of the battery terminal 110 is inserted into the bolt hole 5e formed in the flat plate portion 5c (step ST3).

  Next, the worker assembles the terminal 115 to the stud bolt 112 so that the terminal 115 provided at the end of the electric wire 114 is positioned on the flat plate portion 5c of the connecting bus bar 5 as a terminal assembling step (step ST4). ).

  Then, the operator finally tightens the nut 5f and the nut 5g as a final tightening step (step ST5), and the method of assembling the connection bus bar 5 is completed.

  In the fuse unit 1 configured as described above, the fusible link 2 is slid into the housing space 32c of the holding part 32 of the protector 3 along the short side direction, and each restricting claw part 32e is fusible link. 2 and each restricting mechanism 6 restricts the movement of the fusible link 2 to the opposite side, whereby the fusible link 2 is locked and held in the accommodation space 32c. In the fuse unit 1, the battery post 102 is inserted into the post insertion hole 31 a of the base portion 31 of the protector 3, and the protector 3 is fusible link in such a positional relationship that the base portion 31 is located in the recess 106. 2 is assembled on the post standing surface 105 of the battery 100. At this time, the fuse unit 1 causes the protector 3 together with the fusible link 2 on the post standing surface 105 by engaging the locking claws 41 and 42 of the locking mechanism 4 with the lower end surface in the vertical direction of the lid member 104. Can be locked and locked.

  In this way, the fuse unit 1 is such that at least a part of the protector 3 is positioned on the post standing surface 105 of the battery 100 and the fusible link 2 is placed and held on the post standing surface 105. Can do. The fuse unit 1 is provided with the connecting bus bar 5 so as to connect the fuse element 21 and the battery terminal 110 after the battery terminal 110 is assembled to the battery post 102, and bolts, nuts, etc. of each part are tightened. . As a result, the battery terminal 110 is fastened to the battery post 102 and the battery terminal 110 and the fusible link 2 are connected. At this time, the connecting bus bar 5 also functions as a regulating member that regulates the assembly angle of the battery terminal 110 with respect to the battery post 102.

  Here, the description has been given on the assumption that the protector 3 is assembled on the post standing surface 105 together with the fusible link 2 after the fusible link 2 is assembled to the protector 3, but the present invention is not limited to this, and the protector 3 is assembled to the post standing surface 105. After the assembly, the fusible link 2 may be assembled to the protector 3. In addition, the terminal 115 provided at the end of the above-described electric wire 114 is connected to the stud bolt 112 of the battery terminal 110 together with the connecting bus bar 5.

  The fuse unit 1 described above includes the fusible link 2, the protector 3, and the connecting bus bar 5 that are connected to the battery terminal 110 and the fusible body 21c is blown when an overcurrent flows. The protector 3 includes a base portion 31 interposed between the post standing surface 105 and the battery terminal 110 in a state where the battery terminal 110 is fastened to the battery post 102 provided on the post standing surface 105 of the battery housing 101. The holding portion 32 is connected to the base portion 31 and holds the fusible link 2 on the post standing surface 105. The connecting bus bar 5 electrically connects the fusible link 2 and the battery terminal 110, and absorbs a dimensional deviation between the connection position of the fusible link 2 and the connection position of the battery terminal 110. The shift amount absorbing structure 5h is provided.

  Therefore, the fuse unit 1 holds the fusible link 2 on the post standing surface 105 of the battery casing 101 by the holding portion 32 connected to the base portion 31 of the protector 3, and the fusible link 2 on the post standing surface 105. By receiving the load of 2, the load acting on the battery terminal 110 from the fuse unit 1 can be suppressed. Further, in the fuse unit 1, since the connecting bus bar 5 has the shift amount absorbing structure 5 h, the fusible link 2 and the battery terminal 110 are connected to each other from the connecting bus bar 5 according to the shift amount. A load acting on the battery terminal 110 can be suppressed. As a result, the fuse unit 1 can suppress a load acting on the battery post 102.

  In addition, the fuse unit 1 has a post standing surface 105 (vertical upper surface) of the battery housing 101 when a space for installing the fuse unit 1 cannot be secured around the side surface of the battery housing 101. Since the installation space can be secured above and the fusible link 2 can be arranged, the fusible link 2 can be appropriately provided.

  Furthermore, since the connecting bus bar 5 has the shift amount absorbing structure 5h in the fuse unit 1, workability when connecting the connecting bus bar 5 to the fusible link 2 and the battery terminal 110 can also be improved.

  More specifically, according to the fuse unit 1 described above, the connecting bus bar 5 is a bolt as a long hole formed along the orthogonal direction orthogonal to the axial direction of the battery post 102, here, the long side direction. It has a hole 5d and is connected to the fusible link 2 by inserting a stud bolt 22 formed on the fusible link 2 side into the bolt hole 5d. And the deviation | shift amount absorption structure 5h is comprised by 5 d of bolt holes. Therefore, the fuse unit 1 is located between the connection position with the fusible link 2 and the connection position with the battery terminal 110 in a state where the connecting bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. Can be absorbed by the bolt holes 5d constituting the displacement amount absorbing structure 5h. As a result, the fuse unit 1 can suppress the load acting on the battery terminal 110 from the connection bus bar 5 according to the amount of displacement, and can suppress the load acting on the battery post 102.

  Further, according to the fuse unit 1 described above, the fusible link 2 has the rotation allowable support portion 23a that rotatably supports the connecting bus bar 5 with the rotation axis along the axial direction of the battery post 102 as the rotation center. Then, the rotation allowable support portion 23a absorbs a shift amount that absorbs a shift amount in dimension between the connection position between the connection bus bar 5 and the fusible link 2 and the connection position between the connection bus bar 5 and the battery terminal 110. Structure 2a is constructed. Therefore, the fuse unit 1 includes the connection position of the connection bus bar 5 and the fusible link 2, the connection bus bar 5 and the battery terminal in a state where the connection bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. The shift amount in the short side direction between the connecting position with 110 can be absorbed by the rotation allowable support portion 23a constituting the shift amount absorption structure 2a. As a result, the fuse unit 1 can suppress the load acting on the battery terminal 110 from the connection bus bar 5 according to the amount of displacement, and can suppress the load acting on the battery post 102.

  Furthermore, according to the fuse unit 1 described above, the connecting bus bar 5 is provided in the axial direction of the flat plate portion 5b connected to the fusible link 2, the flat plate portion 5c connected to the battery terminal 110, and the battery post 102. And a step portion 5a that extends along the axis and connects the flat plate portion 5b and the flat plate portion 5c to allow bending along the axial direction. And the shift | offset | difference amount absorption structure 5h is comprised by the level | step-difference part 5a. Therefore, the fuse unit 1 includes the connection position of the connection bus bar 5 and the fusible link 2, the connection bus bar 5 and the battery terminal in a state where the connection bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. A shift amount in the axial dimension between the connecting position and the connecting position with 110 can be absorbed by the rotation permissible support portion 23a constituting the shift amount absorbing structure 2a. As a result, the fuse unit 1 can suppress the load acting on the battery terminal 110 from the connection bus bar 5 according to the amount of displacement, and can suppress the load acting on the battery post 102.

  Further, according to the fuse unit 1 described above, the holding portion 32 defines an accommodation space portion 32c that is formed along an orthogonal direction orthogonal to the axial direction of the battery post 102 and accommodates the fusible link 2. A side wall 32b capable of guiding the fusible link 2 along the orthogonal direction to the accommodating space 32c and an axial end of the side wall 32b are in contact with the fusible link 2 accommodated in the accommodating space 32c. And a restricting claw portion 32e for restricting movement of the fusible link 2 along the axial direction. Therefore, the fuse unit 1 can be assembled by slidingly inserting the fusible link 2 into the accommodating space portion 32c in the orthogonal direction (short side direction) along each side wall 32b, and the restricting claw portions 32e are The fusible link 2 can be held in the accommodation space 32c by abutting against the bull link 2. The fuse unit 1 has a structure in which the fusible link 2 is slid and inserted in the orthogonal direction and assembled, so that the load acting on the battery post 102 can be suppressed as described above. The backlash with respect to the axial direction (vertical direction) orthogonal to the direction can also be reduced. As a result, the fuse unit 1 can suppress vibration in the axial direction in a state where the fusible link 2 is held by the holding part 32, so that the holding part 32 is deformed by vibration of the fusible link 2, for example. It is possible to suppress the occurrence of such a situation. In particular, for example, when the battery 100 is mounted on a vehicle, the fuse unit 1 tends to have a relatively large vibration along the vertical direction (axial direction). Since it can be set as the structure which is easy to reduce the rattling with respect to a perpendicular direction (axial direction), the fusible link 2 can be appropriately hold | maintained at the holding | maintenance part 32, for example. This also allows the fuse unit 1 to reduce vibrations transmitted from the fusible link 2 side to the battery post 102 side via the connecting bus bar 5, so that the load acting on the battery post 102 is also suppressed from this point. be able to.

  Furthermore, according to the fuse unit 1 demonstrated above, the control mechanism 6 which controls the movement along the orthogonal direction of the fusible link 2 accommodated in the accommodation space part 32c is provided. Accordingly, the fuse unit 1 is moved by the restriction mechanism 6 along the orthogonal direction (short side direction) of the fusible link 2 accommodated in the accommodating space 32c, typically on the side opposite to the side where the slide is inserted. Therefore, the fusible link 2 can be restricted from being detached from the holding portion 32.

  In the above description, the connecting bus bar 5 is described as being configured by a single plate-like conductor, but the present invention is not limited thereto. A plurality of connection bus bars 5 </ b> A according to the modification shown in FIG. 8 are stacked in the axial direction of the battery post 102. Here, the connection bus bar 5A is formed by laminating three plate-like conductors. The connecting bus bar 5A can be configured by laminating a plurality of, in this case, three sheets within a range satisfying a thickness defined according to a required energization current. The fuse unit 1 can be configured to be more easily bent and deformed in the axial direction (vertical direction) by stacking a plurality of connecting bus bars 5A. Therefore, in this case, the fuse unit 1 can further suppress the load acting on the battery post 102.

  Further, the connecting bus bar 5 described above is formed such that the stepped portion 5a intersects the axial direction, and the stepped portion 5a is bent at an acute angle with respect to the flat plate portions 5b and 5c, in other words, Although described as what is formed so that it may become a substantially Z shape when it sees along a side (short side direction), it does not restrict to this. The connecting bus bar 5 may be configured to have a bending allowing portion (corresponding to the stepped portion 5a in the above description) that allows bending along the axial direction. For example, the stepped portion 5a intersects the axial direction. The step portion 5a is formed so as to be bent at an obtuse angle with respect to the flat plate portions 5b and 5c, thereby constituting a bending allowance portion that allows bending along the axial direction. Moreover, as for the connection bus bar 5, the bending | flexion permission part may be comprised by helical shape or bellows shape (bellows shape).

  In the connection bus bar 5 described above, the bolt hole 5d as a long hole is described as being formed along the long side direction as the orthogonal direction, but is not limited thereto, and is along the short side direction as the orthogonal direction. May be formed. In this case, the fuse unit 1 has a connection position between the fusible link 2 and a connection position with the battery terminal 110 in a state where the connecting bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. The amount of deviation in the dimension in the short side direction can be absorbed by the bolt holes 5d constituting the deviation amount absorbing structure 5h.

  Moreover, although the connection bus bar 5 demonstrated above demonstrated as what the bolt hole 5d was formed as a long hole, the bolt hole 5e may be formed as a long hole. In this case, the connecting bus bar 5 has a bolt hole 5e as a long hole formed along an orthogonal direction orthogonal to the axial direction of the battery post 102, here, the long side direction, and a battery terminal is connected to the bolt hole 5e. The stud bolt 112 as a protrusion formed on the 110 side is inserted to be connected to the battery terminal 110. And the shift | offset | difference amount absorption structure 5h is comprised by the bolt hole 5e. Even in this case, the fuse unit 1 has the connection position between the fusible link 2 and the battery terminal 110 in a state where the connecting bus bar 5 is connected to both the fusible link 2 and the battery terminal 110. The shift amount in the dimension in the long side direction with respect to the connection position can be absorbed by the bolt hole 5e constituting the shift amount absorption structure 5h.

  Although the restriction mechanism 6 described above has been described as having the restriction recess 6a and the restriction protrusion 6b, the present invention is not limited to this. The restriction mechanism 6A according to the modification shown in FIG. 9 includes a leaf spring member 6e instead of the restriction recess 6a. The leaf spring member 6e is formed by being bent into a predetermined shape, and is installed in the accommodation groove portion 6f formed in the holding portion 32. In this case, each regulation mechanism 6A has the inclined surface of each regulation projection 6b when the fusible link 2 is slid and inserted into the accommodation space 32c along the orthogonal direction (short side direction) via the slide opening 32d. When the 6c slides while contacting and deforming the leaf spring member 6e, each restricting convex portion 6b moves into the space on the back side of each leaf spring member 6e. At this time, each restricting mechanism 6A can move the restricting convex portion 6b into the space on the back side of each leaf spring member 6e without bending a predetermined portion of the holding portion 32. The bull link 2 can be slid into the accommodating space 32c of the holding part 32. Each regulation mechanism 6A is configured such that each regulation projection 6b moves into the space on the back side of each leaf spring member 6e and is fitted, and the contact surface 6d of each regulation projection 6b is each leaf spring member. Movement along the orthogonal direction (short side direction) of the fusible link 2 accommodated in the accommodating space 32c by contact with the end face of 6e, typically, movement to the opposite side to the slide insertion side Can be regulated.

[Embodiment 2]
FIG. 10 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the second embodiment is applied. FIG. 11 is a perspective view illustrating a schematic configuration of a connecting bus bar of the fuse unit according to the second embodiment. The fuse unit according to the second embodiment is different from the first embodiment in the configuration of the connection member. In addition, about the structure, operation | movement, and effect which are common in embodiment mentioned above, the overlapping description is abbreviate | omitted as much as possible.

  As shown in FIGS. 10 and 11, the fuse unit 201 according to the present embodiment includes a connection bus bar 205 as a connection member instead of the connection bus bar 5. The fuse unit 201 has substantially the same configuration as the above-described fuse unit 1 except that the configuration of the holding portion 32 of the protector 3 is slightly different depending on the configuration of the connection bus bar 205 except for the connection bus bar 205. Since there is, explanation is omitted.

  The connecting bus bar 205 includes a flat plate portion 205a as a fusible link side connection portion, a flat plate portion 205b as a terminal side connection portion, an orthogonally extending portion 205c as a first bending allowance portion, and a second deflection allowance portion. Connecting portion 205d and a connecting portion 205e as a third bending allowance portion. The connecting bus bar 205 is a plate-like metal bus bar, and an orthogonally extending portion 205 c, a connecting portion 205 d, and a connecting portion 205 e are formed so as to correspond to a step due to the concave portion 106 on the post standing surface 105. The flat plate portion 205a is connected to the fusible link 2 by forming a bolt hole 205f. The flat plate portion 205b is formed with a bolt hole 205g and connected to the battery terminal 110. Here, both the bolt hole 205f and the bolt hole 205g are formed in a perfect circle shape. The orthogonally extending portion 205 c is a portion that extends along the orthogonal direction orthogonal to the axial direction of the battery post 102, here the short side direction, and allows bending along the short side direction. The connecting portion 205d is a portion that connects the flat plate portion 205a and one end of the orthogonally extending portion 205c and allows bending along the axial direction. The connecting portion 205e is a portion that connects the flat plate portion 205b and the other end of the orthogonally extending portion 205c and allows bending along the axial direction. The flat plate portion 205a, the connecting portion 205d, the flat plate portion 205b, and the connecting portion 205e are all arranged so as to face the post standing surface 105. The orthogonally extending portion 205 c is disposed so as to face the wall surface along the short side direction that defines the recess 106. In the state where the connecting bus bar 205 is assembled to the fusible link 2 and the battery terminal 110, the flat plate portion 205a and the connecting portion 205d are on one side in the short side direction of the orthogonally extending portion 205c and in the vertical direction (axial direction). Extending from the upper end portion to the fusible link 2 side along the long side direction, the flat plate portion 205b and the connecting portion 205e are on the other side in the short side direction of the orthogonal extending portion 205c and below the vertical direction (axial direction). It extends to the battery terminal 110 side along the long side direction from the edge part of the side. In other words, in the connecting bus bar 205, the orthogonally extending portion 205c connects the flat plate portion 205a, the connecting portion 205d, the flat plate portion 205b, and the connecting portion 205e. The connecting portion 205d connects the flat plate portion 205a and one end of the orthogonally extending portion 205c while bending them. The connecting portion 205e connects the flat plate portion 205b and the other end of the orthogonally extending portion 205c while bending them. In the connecting bus bar 205, the stud bolt 22 of the power supply side terminal 21a is inserted into the bolt hole 205f and the nut 5f is fastened, and the stud bolt 112 of the battery terminal 110 is inserted into the bolt hole 205g and the nut 5g is fastened. The stud bolt 22 of the power supply side terminal 21a and the stud bolt 112 of the battery terminal 110 are electrically connected.

  And the shift amount absorption structure 205h as the connection member side shift amount absorption structure of this embodiment is comprised by the orthogonal direction extension part 205c, the connection part 205d, and the connection part 205e. The connecting bus bar 205 has an axial direction (vertical direction), a short side direction, and an orthogonal extension portion 205c, a connecting portion 205d, and a connecting portion 205e that constitute the deviation amount absorbing structure 205h. And it can be bent and deformed in the long side direction. That is, the connecting bus bar 205 is connected to both the fusible link 2 and the battery terminal 110 in the axial direction between the connection position with the fusible link 2 and the connection position with the battery terminal 110. It is configured so that the amount of deviation in the dimensions in the short-side direction and the long-side direction can be absorbed by the orthogonally extending portion 205c, the connecting portion 205d, and the connecting portion 205e constituting the deviation amount absorbing structure 205h. ing.

  The fuse unit 201 described above holds the fusible link 2 on the post standing surface 105 of the battery housing 101 by the holding portion 32 connected to the base portion 31 of the protector 3, and the fuse standing 201 on the post standing surface 105 By receiving the load of the bull link 2, the load acting on the battery terminal 110 from the fuse unit 1 can be suppressed. Furthermore, since the connecting bus bar 205 has the shift amount absorbing structure 205h in the fuse unit 201, the fusible link 2 and the battery terminal 110 are connected by the connecting bus bar 205 from the connecting bus bar 205 according to the shift amount. A load acting on the battery terminal 110 can be suppressed. As a result, the fuse unit 201 can suppress a load acting on the battery post 102.

  Further, according to the fuse unit 201 described above, the connecting bus bar 205 includes the flat plate portion 205a connected to the fusible link 2, the flat plate portion 205b connected to the battery terminal 110, and the axial direction of the battery post 102. An orthogonal extension 205c that extends along the orthogonal direction and allows bending along the orthogonal direction is connected to one end of the flat plate portion 205a and the orthogonal extension 205c, thereby bending along the axial direction. A connecting portion 205d to be allowed, a connecting portion 205e that connects the flat plate portion 205b and the other end of the orthogonally extending portion 205c and allows bending along the axial direction; It is comprised by the existing part 205c, the connection part 205d, and the connection part 205e. Therefore, the fuse unit 201 is connected to the connecting bus bar 205 and the fusible link 2 in the state where the connecting bus bar 205 is connected to both the fusible link 2 and the battery terminal 110, and the connecting bus bar 5 and the battery terminal. The amount of displacement in each direction between the connecting position with 110 can be absorbed by the orthogonally extending portion 205c, the connecting portion 205d, and the connecting portion 205e constituting the displacement absorbing structure 205h. As a result, the fuse unit 201 can suppress the load acting on the battery terminal 110 from the connection bus bar 205 according to the amount of deviation, and can suppress the load acting on the battery post 102.

[Embodiment 3]
FIG. 12 is a perspective view illustrating a schematic configuration of a battery to which the fuse unit according to the third embodiment is applied. FIG. 13 is a flowchart illustrating an example of a method for assembling a fuse unit according to the third embodiment. The fuse unit and the fuse unit assembling method according to the third embodiment are different from the first embodiment in the arrangement of the temporary fastening and fasteners. In addition, about the structure, operation | movement, and effect which are common in embodiment mentioned above, the overlapping description is abbreviate | omitted as much as possible.

  As shown in FIG. 12, the fuse unit 301 according to the present embodiment is for fastening the flat plate portion 5 b on the fusible link 2 side of the connecting bus bar 5 to the fusible link 2 instead of the nuts 5 f and 5 g. A nut 305f as a fusible link side fastener and a nut as a terminal side temporary fastening fastener for temporarily fastening the plate portion 5c on the battery terminal 110 side of the connecting bus bar 5 to the battery terminal 110 and final fastening. 305g. Here, the nut 305g is constituted by a nylon nut, while the nut 305f is constituted by a normal nut. The fuse unit 301 has the other configuration substantially the same as the configuration of the fuse unit 1 described above, and a description thereof will be omitted. Hereinafter, a method for assembling the fuse unit 301, particularly a method for assembling the connecting bus bar 5, will be described with reference to the flowchart of FIG.

  First, in the state where the fusible link 2, the protector 3, and the battery terminal 110 are assembled to the battery 100, the worker performs the connecting bus bar installation process (terminal side) as a flat plate portion 5 c on the fusible link 2 side of the connecting bus bar 5. The connecting bus bar 5 is assembled to the battery terminal 110 side so that the stud bolt 112 of the battery terminal 110 is inserted into the bolt hole 5e formed in (step ST201).

  Next, as a terminal side temporary fastening step, the operator temporarily fastens the flat plate portion 5c on the battery terminal 110 side of the connecting bus bar 5 to the fusible link 2 with a nut 305g formed of a nylon nut (step ST202).

  Next, as a connecting bus bar assembling process (FL side) as a connecting member assembling process, the operator temporarily connects the flat plate portion 5c on the battery terminal 110 side of the connecting bus bar 5 to the battery terminal 110 and then connects the connecting bus bar 5 to the battery terminal 110. The connecting bus bar 5 is assembled to the fusible link 2 side by inserting the stud bolt 22 of the power supply side terminal 21a into the bolt hole 5d formed in the flat plate part 5b on the fusible link 2 side (step ST203). .

  Next, as a terminal assembling step, the operator locates the terminal 315 provided at the end of the electric wire 114 so as to be interposed between the flat plate portion 5c of the connection bus bar 5 and the nut 305g for temporary fastening. The terminal 315 is assembled to the stud bolt 112 (step ST204). Here, the terminal 315 of the present embodiment is formed in a shape that can be assembled between the connecting bus bar 5 and the nut 305g even when the nut 305g is temporarily tightened. Here, the terminal 315 is formed with a hole 315a slightly larger than the projection region obtained by projecting the nut 305g in the orthogonal direction, here, the short side direction, and the nut 305g in the temporarily tightened state is connected to the hole 315g. 315a can be assembled between the connecting bus bar 5 and the stud bolt 112 while passing through 315a.

  Then, as a final tightening step, the operator performs final tightening of the nut 305f and the nut 305g (step ST205), and ends the method of assembling the connecting bus bar 5.

  In the fuse unit 301 described above, the fusible link 2 is held on the post standing surface 105 of the battery housing 101 by the holding portion 32 connected to the base portion 31 of the protector 3, and the fuse standing 301 is connected to the fuse standing 301 by the post standing surface 105. By receiving the load of the bull link 2, the load acting on the battery terminal 110 from the fuse unit 1 can be suppressed. Furthermore, since the connecting bus bar 5 has the shift amount absorbing structure 5h in the fuse unit 301, the fusible link 2 and the battery terminal 110 are connected with the connecting bus bar 5 from the connecting bus bar 5 according to the shift amount. A load acting on the battery terminal 110 can be suppressed. As a result, the fuse unit 301 can suppress a load acting on the battery post 102.

  Further, the fuse unit 301 described above includes a nut 305g for temporarily tightening and permanently tightening the battery terminal 110 side of the connection bus bar 5 to the battery terminal 110, and the fusible link 2 side of the connection bus bar 5 A nut 305f for final fastening to the fusible link 2 is provided.

  Then, according to the method for assembling the fuse unit 301 described above, the terminal-side temporary fastening step (ST202) for temporarily fastening the battery terminal 110 side of the connecting bus bar 5 to the battery terminal 110 with the nut 305g, and the terminal-side temporary fastening After the step (ST202), the connecting bus bar is assembled so that the fusible link 2 side of the connecting bus bar 5 is assembled to the fusible link 2 in a state where the battery terminal 110 side of the connecting bus bar 5 is temporarily fastened to the battery terminal 110 by the nut 305g. After the step (FL side) (ST203) and the connection bus bar assembly step (FL side) (ST203), a terminal assembly step (ST204) in which another terminal 315 is interposed between the connection bus bar 5 and the nut 305g. After the terminal assembly step (ST204), the nut 305g, and The fusible link 2 side of the connecting bus bar 5 and a tightened step of the tightening nut 305f for the tightening nuts 305f for the fastening to the fusible link 2 (ST205).

  Therefore, the fuse unit 301 can be finally tightened from the beginning without going through the process of temporarily setting the nut 305f for fixing the fusible link 2 side of the connecting bus bar 5 to the fusible link 2. It is possible to suppress the occurrence of a situation in which the nut 305f is forgotten to be tightened while temporarily tightened.

  The fuse unit and the fuse unit assembly method according to the above-described embodiment of the present invention are not limited to the above-described embodiment, and various modifications can be made within the scope described in the claims. The fuse unit and the fuse unit assembling method according to the present embodiment may be configured by appropriately combining the constituent elements of the embodiments and modifications described above. For example, the bolt hole 205f or the bolt hole 205g described in the second embodiment may be a long hole along the orthogonal direction.

  In the above description, the fusible link 2 has been described as the fuse element 21 and the stud bolt 22 being embedded and integrated in the housing 23 by insert molding or the like, but is not limited thereto.

  In the above description, the holding portion 32 of the protector 3 has been described as being integrally formed with the base portion 31 so as to be adjacent to the base portion 31 with respect to the long side direction. It may be formed integrally with the base portion 31 so as to be adjacent to the base portion 31 with respect to the side direction.

  Further, the fuse unit described above may be configured not to include a locking mechanism.

  Further, the fuse unit described above has been described as being applied to the battery 100 in which the post standing surface 105 has the recess 106 formed thereon. However, the present invention is not limited to this, and the post standing surface 105 having no recess 106 is provided. You may apply to a planar battery. In this case, in the fuse unit, the base portion 31, the holding portion 32, the connecting bus bar 5 and the like described above are formed in a substantially planar shape.

1, 201, 301 Fuse unit 2 Fusible link 2a Displacement absorption structure (fusible link side displacement absorption structure)
3 Protector (holding mechanism)
4 Locking mechanism 5, 5A, 205 Connection bus bar (connection member)
5a Step part (flexible part)
5b, 205a Flat plate (fusible link side connection)
5c, 205b Flat plate part (terminal side connection part)
5d bolt hole (long hole)
5h, 205h Shift amount absorption structure (Connecting member side shift amount absorption structure)
6, 6A Control mechanism 21c Fusible body 22 Stud bolt (protrusion)
23a Rotation support part 31 Base part 32 Holding part 32b Side wall 32c Storage space part 32e Restriction claw part 100 Battery 101 Battery housing 102 Battery post 105 Post standing surface 110 Battery terminal 115, 315 terminal 205c 1 deflection allowable part)
205d Connecting part (second bending allowance part)
205e Connecting part (third bending allowance part)
305f Nut (Fusable link side fastener)
305g Nut (Terminal side temporary fastening combined fastener)

Claims (11)

A fusible link that melts when a battery terminal is connected and overcurrent flows,
A base portion interposed between the post standing surface and the battery terminal in a state in which the battery terminal is fastened to a battery post provided on a post standing surface of the battery housing; and the base portion connected to the base portion. A holding mechanism having a holding portion for holding the fusible link on the post standing surface;
A connecting member side shift that electrically connects the fusible link and the battery terminal and absorbs a dimensional shift between a connection position of the fusible link and a connection position of the battery terminal. A connecting member having a mass absorption structure,
Fuse unit. The connection member has a long hole formed along an orthogonal direction orthogonal to the axial direction of the battery post, and a protrusion formed in the long hole on the fusible link side or the battery terminal side. Is inserted and inserted,
The connecting member side shift amount absorbing structure is constituted by the elongated holes.
The fuse unit according to claim 1. The fusible link has a rotation allowable support portion that rotatably supports the connection member about a rotation axis along the axial direction of the battery post, and the rotation allowable support portion includes the connection member and the rotation member. A fusible link side displacement amount absorbing structure for absorbing a displacement amount on a dimension between a connection position with the fusible link and a connection position between the connection member and the battery terminal;
The fuse unit according to claim 1 or 2. The connection member includes a fusible link side connection portion connected to the fusible link, a terminal side connection portion connected to the battery terminal, and the fusible link extending along an axial direction of the battery post. A bending-permitting portion that connects the link-side connecting portion and the terminal-side connecting portion and allows bending along the axial direction;
The connection member side shift amount absorbing structure is configured by the deflection allowing portion.
The fuse unit according to any one of claims 1 to 3. The connection member extends along a fusible link side connection portion connected to the fusible link, a terminal side connection portion connected to the battery terminal, and an orthogonal direction orthogonal to the axial direction of the battery post. And a second bendable portion that allows bending along the orthogonal direction, a second link that connects the fusible link side connection portion and one end of the first bendable portion, and allows bending along the axial direction. A deflection allowing portion; and a third deflection allowing portion that connects the terminal side connection portion and the other end of the first deflection allowing portion and allows the deflection along the axial direction;
The connection member side shift amount absorption structure is configured by the first deflection allowance portion, the second deflection allowance portion, and the third deflection allowance portion.
The fuse unit according to claim 1. A plurality of the connection members are stacked in the axial direction of the battery post.
The fuse unit according to any one of claims 1 to 5. A terminal side temporary fastening combined fastener for temporarily fastening the battery terminal side of the connection member to the battery terminal and final fastening;
A fusible link side fastener for finally fastening the fusible link side of the connecting member to the fusible link;
The fuse unit according to any one of claims 1 to 6. The holding portion defines an accommodation space portion that is formed along an orthogonal direction perpendicular to the axial direction of the battery post and that accommodates the fusible link, and the fusible link extends along the orthogonal direction. A side wall that can be guided to a portion, and an axial end portion of the side wall that contacts the fusible link housed in the housing space and moves along the axial direction of the fusible link. A regulation claw part for regulating
The fuse unit according to any one of claims 1 to 7. A regulation mechanism for regulating movement of the fusible link accommodated in the accommodation space along the orthogonal direction;
The fuse unit according to claim 8. A fusible link that melts when a battery terminal is connected and overcurrent flows,
A base portion interposed between the post standing surface and the battery terminal in a state in which the battery terminal is fastened to a battery post provided on a post standing surface of the battery housing; and the base portion connected to the base portion. A holding mechanism having a holding portion for holding the fusible link on the post standing surface,
The holding portion defines an accommodation space portion that is formed along an orthogonal direction perpendicular to the axial direction of the battery post and that accommodates the fusible link, and the fusible link extends along the orthogonal direction. A side wall that can be guided to a portion, and an axial end portion of the side wall that contacts the fusible link housed in the housing space and moves along the axial direction of the fusible link. Characterized by having a regulation claw part that regulates,
Fuse unit. The fusible link that melts the fusible body when an overcurrent flows and is connected to the battery terminal, and the post standing in a state where the battery terminal is fastened to the battery post provided on the post standing surface of the battery housing. A holding mechanism having a base portion interposed between a surface and the battery terminal, a holding portion connected to the base portion and holding the fusible link on the post standing surface, the fusible link and the battery A connecting member having a connecting member side shift amount absorbing structure for electrically connecting a terminal and absorbing a shift amount in dimension between a connecting position with the fusible link and a connecting position with the battery terminal The battery terminal side of the connecting member of the fuse unit comprising a terminal-side temporary fastening and fastener to the battery terminal A terminal side temporary tightening step for tightening,
After the terminal side temporary fastening step, the fusible link side of the connecting member is connected to the fusible link in a state where the battery terminal side of the connecting member is temporarily fastened to the battery terminal by a terminal side temporary fastening combined fastener. A connecting member assembling step to be assembled;
After the connecting member assembling step, a terminal assembling step of interposing another terminal between the connecting member and the terminal-side temporary fastening combined fastener,
After the terminal assembling step, the terminal side temporary fastening / fastening fastener, and the main fastening of the fusible link side fastening tool for fastening the fusible link side of the connecting member to the fusible link. Including a tightening step,
Fuse unit assembly method.

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