JP5514498B2 - Fusible link unit - Google Patents

Description

  The present invention relates to a fusible link unit that is directly connected to a battery mounted mainly on a vehicle such as an automobile to protect a main power supply circuit.

  Patent Document 1 below discloses a conventional fusible link unit technology. A conventional fusible link unit has a battery-side bus bar connected to a battery, a load-side bus bar connected to a load via an external connection means, and a current exceeding the rating interposed between the battery-side bus bar and the load-side bus bar. Is formed to include a fusible portion that includes a fusible portion that melts when the battery flows, and an insulating case that covers predetermined portions of the battery-side bus bar and the load-side bus bar.

  A conventional fusible link unit is formed in a substantially L-shape so as to straddle a battery upper surface where a battery post is present and a battery side surface orthogonal to the battery upper surface. The fusible part and the load side bus bar are disposed on the side facing the battery side surface.

JP2009-56992A (FIG. 5)

  The fusible body portion has a relatively large size and a forming space so that various ratings can be set in consideration of the versatility of the fusible link. Therefore, when downsizing the fusible link unit, specifically when downsizing along the extending direction of the portion facing the side surface of the battery, this downsizing becomes difficult due to the formation space. It has the problem of becoming. Although it is possible to reduce the size in the above direction at the expense of various rating settings, the versatility of the fusible link is lost.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fusible link unit that can be set in various ratings and can be downsized.

The fusible link unit of the present invention according to claim 1, which has been made to solve the above problems, includes a battery-side bus bar connected to a battery, a load-side bus bar connected to a load via external connection means, A fusible body-integrated bus bar having a fusible body portion that is interposed between the bus bar end portions of the battery side bus bar and the load side bus bar and that melts when a current exceeding a rating flows; and the battery side bus bar And an insulative case that covers each predetermined portion of the load-side bus bar, a bus bar end portion of the battery-side bus bar and the load side with respect to a soluble body portion forming surface that forms the soluble body portion as the busbar ends of the bus bar is directed in substantially perpendicular direction, the battery-side bus bar and said negative With placing the side busbars, the battery of the bus bar substantially L shape bent battery-side bus bar body was disposed substantially parallel to the fusible portion forming surface, the length of the vertical direction of the fusible integrated bus bars Comprises the sum of the length of the end of the bus bar in the battery side bus bar and the length of the load side bus bar .

  According to the present invention having such characteristics, the fusible part that enables various kinds of rating settings is formed on a surface that is substantially orthogonal to the direction in which the size is reduced. According to the present invention, the fusible part is disposed at a position that does not affect downsizing.

  The fusible link unit of the present invention according to claim 2 is the fusible link unit according to claim 1, wherein the fusible link unit according to claim 1 is in contact with a battery upper surface having a battery post and a battery side surface orthogonal to the battery upper surface. It is characterized by being formed in an L shape.

  According to the present invention having such a feature, a fusible link unit having a substantially L-shape is formed, and it is possible to regulate the shake of the fusible link unit itself by contacting the battery upper surface and the battery side surface. Become.

  According to the present invention described in claim 1, there is an effect that it is possible to provide a fusible link unit that can be set in various ratings and can be downsized.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, there is also an effect that a fusible link unit having high vibration resistance can be provided.

It is a perspective view which shows the fusible link unit of this invention. It is a figure of the fusible link of FIG. 1, (a) is a top view, (b) is a front view, (c) is a side view. It is a figure of a soluble body integrated busbar, (a) is a perspective view, (b) is a side view. It is a figure of a comparative example, (a) is a perspective view of a fusible link, (b) is a perspective view of a soluble body integrated type bus bar.

  The battery-side bus bar and the load-side bus bar are arranged so that the end portions of the bus bars are substantially orthogonal to the soluble-body-portion forming surface that forms the soluble-body portion. Further, the battery-side bus bar is bent into a substantially L shape, and the battery-side bus bar main body is arranged substantially parallel to the fusible part forming surface. That is, the fusible part that enables various kinds of rating settings is formed on a surface that is substantially orthogonal to the direction in which the miniaturization is intended.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view showing a fusible link unit of the present invention, and FIG. 2 is a plan view, a front view, and a side view. FIG. 3 is a perspective view and a side view of the fusible body integrated bus bar, and FIG. 4 is a view of a comparative example.

  1 and 2, a fusible link unit 1 of the present invention is formed by insert molding a fusible body-integrated bus bar 2 having conductivity and an insulating case 3 made of synthetic resin having insulation properties. For example, the main power supply circuit (not shown) can be protected by being directly connected to a vehicle-mounted battery (not shown). The fusible link unit 1 is substantially L-shaped so as to straddle a battery upper surface (not shown) on which a battery post (not shown) exists and a battery side surface (not shown) orthogonal to the battery upper surface. (By forming in a substantially L shape, it is possible to regulate the shake of the fusible link unit 1 by contacting the battery upper surface and the battery side surface. In other words, the vibration resistance can be improved. ). Hereinafter, the above configuration will be described.

  1 to 3 (mainly in FIG. 3), the fusible body integrated bus bar 2 includes a battery side bus bar 4, a load side bus bar 5, and a fusible body portion 6 integrally. The fusible part 6 is arranged between the battery side bus bar 4 and the load side bus bar 5 so as to connect them. Reference numeral 7 in the fusible part 6 indicates a fusible body that melts when a current exceeding the rating flows. As the soluble material 7, a known material is used. The fusible body integrated bus bar 2 is formed by pressing a conductive metal plate.

  The battery-side bus bar 4 is a portion connected to the battery post via a battery terminal (not shown), and includes a battery-side bus bar body 9 having a through hole 8 for this connection, and a bus bar located on the fusible body portion 6 side. And an end portion 10. The battery-side bus bar 4 is formed in a substantially L shape by bending it at approximately 90 ° at the boundary position between the battery-side bus bar body 9 and the bus bar end portion 10. The battery-side bus bar main body 9 is formed in a flat plate shape. When the surface on which the battery-side bus bar main body 9 exists is a horizontal surface, the bus bar end portion 10 is arranged so as to exist on the vertical surface. The length of the battery-side bus bar body 9 in the longitudinal direction is set to be sufficiently longer than the length of the bus bar end 10.

  The load-side bus bar 5 is a portion connected to a load (not shown) via an external connection means, and is formed into a flat plate shape. A through hole 12 for projecting the stud bolt 11 is formed in the approximate center of the load side bus bar 5. As an example of the external connection means, for example, an electric wire / cable in which a terminal fitting is provided at a terminal is cited. In addition, the shape is not limited to the illustrated shape, and may be formed in a shape that can be connected to a connector. Reference numeral 13 indicates a bus bar end portion of the load-side bus bar 5. The bus bar end portion 13 is disposed on the fusible body portion 6 side.

  The soluble body portion 6 is a portion interposed between the bus bar end portion 10 of the battery side bus bar 4 and the bus bar end portion 13 of the load side bus bar 5 and forms the soluble body portion 6 (the soluble body portion 6 The fusible portion forming surface 14 is substantially orthogonal to the vertical surface where the bus bar end portions 10 and 13 are present, and to the horizontal surface where the battery-side bus bar body 9 is present. Are arranged substantially in parallel. The fusible portion 6 having such an arrangement has a relatively large dimension L4 so that various rating settings can be made in consideration of the versatility of the fusible link (fusible link unit 1).

  1 and 2, the insulating case 3 includes a battery-side case 15 that covers a predetermined portion of the battery-side bus bar 4, a fusible body case 16 that covers a predetermined portion of the fusible-body portion 6, and a predetermined portion of the load-side bus bar 5. And a load-side case 17 that covers the load. The soluble body part case 16 accommodates the soluble body 7 and is formed transparent so that the state can be seen in this embodiment.

  Here, a comparative example will be described with reference to FIG. In the description, the horizontal plane and the vertical plane are the same as those in FIGS. 1 and 3.

  In FIG. 4, a fusible link unit 101 as a comparative example includes a fusible body integrated bus bar 102 and an insulating case 103. The fusible body integrated bus bar 102 is configured to include a battery side bus bar 104, a load side bus bar 105, and a fusible part 106 interposed therebetween.

  The battery-side bus bar 104 has a battery-side bus bar body 107 and a bus bar end portion 108, and is formed in a substantially L shape. The battery-side bus bar body 107 is disposed on the horizontal surface side, and the bus bar end portion 108 is disposed on the vertical surface side. A fusible part 106 and a load-side bus bar 105 are also arranged on the surface side in the vertical direction. Reference numeral 109 indicates a bus bar end portion of the load side bus bar 106. Reference numeral 110 indicates a soluble material.

  The insulating case 103 includes a battery-side case 111 that covers a predetermined portion of the battery-side bus bar 104, a fusible-body portion case 112 that covers a predetermined portion of the fusible-body portion 106, and a load-side case 113 that covers a predetermined portion of the load-side bus bar 105. It is comprised.

  The fusible link unit 101 as a comparative example is related to the fusible body-integrated bus bar 102. The vertical length L11 includes the length L12 of the bus bar end portion 108, the length L13 of the fusible portion portion 106, and the bus bar end. It is set in total with the length L14 of the load side bus bar 106 including the section 109.

  On the other hand, as shown in FIG. 3, the length L1 in the vertical direction of the fusible body integrated bus bar 2 according to the present invention is equal to the length L2 of the bus bar end portion 10 and the load side bus bar 5 including the bus bar end portion 13. And a total length L3. Therefore, when L2 = L12 and L3 = L14, the length L1 in the vertical direction is shorter than the length L11 of the fusible body integrated bus bar 102 of the comparative example by the length of L13 (L1 <L11). That is, according to the present invention, the fusible link unit 1 can be miniaturized (vertical miniaturization) (battery side bus bar 4 if the view is changed and the position of the stud bolt 11 is used as a reference). The position of can be lowered to achieve miniaturization). The present invention relates to the direction of downsizing, and the formation space of the fusible body portion 6 having a relatively large dimension L4 is not affected.

  As described above with reference to FIGS. 1 to 4, according to the present invention, it is possible to provide a fusible link unit 1 that can be set in various ratings and can be downsized. There is an effect that can be done.

  In addition, according to this invention, there exists an effect that the visibility of the soluble body part 6 (soluble body 7) improves with the shape of the soluble body integrated busbar 2. FIG.

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

DESCRIPTION OF SYMBOLS 1 ... Fusible link unit 2 ... Fusible body integrated type bus bar 3 ... Insulation case 4 ... Battery side bus bar 5 ... Load side bus bar 6 ... Fusible body part 7 ... Fusible body 8 ... Through-hole 9 ... Battery side bus bar main body 10 ... End of bus bar Part 11: Stud bolt 12 ... Through hole 13 ... Bus bar end part 14 ... Soluble part forming surface 15 ... Battery side case 16 ... Soluble part case 17 ... Load side case

Claims (2)

A battery-side bus bar connected to the battery, a load-side bus bar connected to the load via an external connection means, and a current exceeding the rating while being interposed between the bus-bar ends of the battery-side bus bar and the load-side bus bar A soluble body integrated bus bar having a soluble body portion that melts the soluble body when flowing
In a fusible link unit including an insulating case covering each predetermined portion of the battery side bus bar and the load side bus bar,
The battery-side bus bar and the load-side bus bar are arranged so that the bus-bar end portion of the battery-side bus bar and the bus-bar end portion of the load-side bus bar are substantially orthogonal to the fusible-body-portion forming surface forming the fusible body portion. And bending the battery-side bus bar into a substantially L shape to dispose the battery-side bus bar body substantially parallel to the fusible part forming surface ,
The fusible link unit according to claim 1, wherein the fusible body integrated bus bar has a vertical length that is a sum of a length of the end portion of the bus bar in the battery side bus bar and a length of the load side bus bar . The fusible link unit according to claim 1,
A fusible link unit, wherein the fusible link unit is formed in a substantially L-shape so as to contact a battery upper surface having a battery post and a battery side surface orthogonal to the battery upper surface.

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