JP5147614B2 - Battery terminal mounting fuse unit - Google Patents

Description

  The present invention relates to a battery terminal mounting fuse unit that enables electric wire connection via a fuse to a battery without going through a fuse box installed away from the battery.

  FIG. 7 shows a conventional example of a battery terminal mounting fuse unit that enables electric connection to a battery via a fuse without going through a fuse box installed away from the battery.

  The battery terminal mounting fuse unit 101 shown here is disclosed in Patent Document 1 below, and the first terminal plate 103a on one end side is connected to the battery terminal 105 and the second terminal plate on the other end side. A bus bar 103 made of a metal plate whose terminal plate part (not shown) is connected to the output-side electrical circuit (output electric wire) 107, and a resin-made housing that accommodates the bus bar 103 in an L shape straddling the ridge line part 109a of the battery 109. And a fuse housing 111.

  The first bus bar 103 is melted by an overcurrent between a bent portion (not shown) that is bent along the ridge portion 109a of the battery 109 and the second terminal plate portion (not shown). A fusible link 113 is provided for conducting and connecting between the second terminal plate portions.

  The battery terminal 105 includes a post connecting portion 105a fastened to a battery post 109b protruding from the upper surface of the battery 109, and a fuse unit connecting plate portion 105b extending to one side of the post connecting portion 105a. The plate portion 105b is provided with a stud bolt 105c for screwing the first terminal plate portion 103a.

  That is, the first terminal plate portion 103a of the bus bar 103 is connected to the battery terminal 105 by fastening with the stud bolt 105c, and is electrically connected to the battery post 109b via the battery terminal 105.

  In the case of the conventional fuse unit 101, generally, the first terminal plate portion 103a on one end side of the bus bar 103 and the second terminal plate portion on the other end side adopt a dedicated mounting structure, respectively. The mounting structure is different.

  In the case of the illustrated example, the first terminal plate portion 103 a has a mounting structure having a bolt insertion hole for fastening the stud bolt 105 c of the battery terminal 105. On the other hand, the second terminal plate portion (not shown) has a tab terminal structure for connecting the output-side electrical circuit 107 with a connector.

JP 2005-135792 A

  By the way, normally, the fusing characteristics of the fuse unit are adjusted by the capacity of a fusible link that conducts and connects between the first terminal plate portion 103a and the second terminal plate portion.

  However, in actuality, the resistance characteristics of the first terminal plate portion 103a including the battery terminal 105 and the resistance characteristics of the second terminal plate portion including the connection terminal on the output-side electrical circuit 107 side are Affects the heat generation characteristics and heat dissipation characteristics around the fusible link, and the fusing performance of the fusible link is also affected.

  Therefore, in order to more accurately set the fusing characteristics in the fuse unit, the resistance characteristics of the first terminal plate portion 103a and the second terminal plate portion of the fuse unit are also accurately managed and the fusing characteristics are adjusted. In some cases, it is necessary to adjust the resistance characteristics of the first terminal plate portion 103a and the second terminal plate portion.

  In the case of the conventional battery terminal mounting fuse unit 101, for example, when the resistance characteristic between the battery terminal and the fusible link is changed in accordance with the change of the rating on the output-side electrical circuit 107 side, the first Design change such as the shape change of the terminal board portion 103a, and accordingly, a new start of the punching die when manufacturing the bus bar 103, and a new insert molding die for insert molding the bus bar 103 into the fuse housing 111 Groundbreaking is required.

  As a result, there has been a problem that changing the resistance characteristic between the battery terminal and the fusible link requires a large economic burden and cannot easily cope with the change in the resistance characteristic.

  An object of the present invention is to solve the above-mentioned problems, and resistance characteristics between a battery terminal and a fusible link without changing a design such as a shape change of the first terminal plate connected to the battery terminal. It is possible to change the resistance characteristics between the battery terminal and the fusible link according to the change of the rating on the output side electrical circuit side, etc. An object of the present invention is to provide a battery terminal mounting fuse unit.

The above-described object of the present invention is achieved by the following configuration.
(1) A metal plate bus bar in which the first terminal plate portion on one end side is connected to the battery terminal and the second terminal plate portion on the other end side is connected to the output-side electrical circuit, and this bus bar is connected to the battery A resin-made fuse housing that is housed in an L-shape that straddles the ridge line portion of
The bus bar has an overcurrent either between the bent portion bent along the ridge line portion of the battery and the first terminal plate portion or between the bent portion and the second terminal plate portion. A battery terminal mounting fuse unit provided with a fusible link that conducts conductive connection between terminal plate parts so as to be melted by
The battery terminal mounting fuse unit, wherein the first terminal plate portion and the second terminal plate portion are formed in the same mounting shape.

(2) The distance X from the bent portion to the mounting portion of the first terminal plate portion is made equal to the distance Y from the bent portion to the mounting portion of the second terminal plate portion. The fuse unit for battery terminal attachment as described in said (1).

  According to the configuration of (1) above, since the first terminal plate portion and the second terminal plate portion of the bus bar are formed in the same mounting shape, the first terminal plate portion is attached to the battery terminal. Either the form or the form in which the second terminal plate part is attached to the battery terminal by changing the attachment direction with respect to the battery terminal can be used.

  Therefore, if the resistance characteristics are changed between the first terminal plate portion side and the second terminal plate portion side sandwiching the fusible link, the design of the first terminal plate portion connected to the battery terminal is changed. You can change the resistance characteristics between the battery terminal and the fusible link just by changing the mounting direction with respect to the battery terminal without changing the battery terminal. It is possible to cope with the change in resistance characteristics between the link and the fusible link without incurring costs, and the versatility is improved.

  According to the configuration of (2) above, even when the mounting direction with respect to the battery terminal is changed and the second terminal plate is attached to the battery terminal, the connection position of the output side electrical circuit does not change. While maintaining the compatibility of the output side electrical circuit, the resistance characteristic between the battery terminal and the fusible link can be changed to respond to a change in the rating on the output side electrical circuit side.

  According to the battery terminal mounting fuse unit of the present invention, the first terminal plate portion and the second terminal plate portion of the bus bar are formed in the same mounting shape, so that the first terminal plate portion is connected to the battery terminal. Either the form attached to the battery terminal or the form attached to the battery terminal by changing the mounting direction with respect to the battery terminal can be used.

  Therefore, if the resistance characteristics are changed between the first terminal plate portion side and the second terminal plate portion side sandwiching the fusible link, the design of the first terminal plate portion connected to the battery terminal is changed. You can change the resistance characteristics between the battery terminal and the fusible link just by changing the mounting direction with respect to the battery terminal without changing the battery terminal. It is possible to cope with the change in resistance characteristics between the link and the fusible link without incurring costs, and the versatility is improved.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a battery terminal mounting fuse unit according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a normal mounting direction of a battery terminal mounting fuse unit according to an embodiment of the present invention to a battery, and FIG. 2 is a second terminal of the battery terminal mounting fuse unit shown in FIG. FIG. 3 is a perspective view showing the structure of the bus bar used in the battery terminal mounting fuse unit shown in FIG. 2, and FIG. 4 is shown in FIG. It is dimension explanatory drawing of the unfolding state of a bus bar.

  In the battery terminal mounting fuse unit 1 according to this embodiment, the first terminal plate portion 3a on one end side is connected to the battery terminal 105, and the second terminal plate portion 3b on the other end side is connected to the output side electrical circuit. A bus bar 3 made of a metal plate connected to the (output electric wire) 5 and a resin fuse housing 7 that accommodates the bus bar 3 in an L shape straddling the ridge line part 109 a of the battery 109 are provided.

  The battery terminal 105 includes a post connecting portion 105a fastened to a battery post 109b protruding from the upper surface of the battery 109, and a fuse unit connecting plate portion 105b extending to one side of the post connecting portion 105a. The plate portion 105b is provided with a stud bolt 105c for screwing the first terminal plate portion 103a.

  That is, the first terminal plate portion 3a of the bus bar 3 is connected to the battery terminal 105 by fastening with the stud bolt 105c, and is electrically connected to the battery post 109b through the battery terminal 105.

  As shown in FIG. 3, the bus bar 3 of the present embodiment is melted by overcurrent between the bent portion 31 that is bent along the ridge line portion 109 a of the battery 109 and the second terminal plate portion 3 b. In addition, a fusible link 9 is provided for electrically connecting the first and second terminal plate portions 3a and 3b.

  And in the bus bar 3 of this Embodiment, the 1st terminal board part 3a and the 2nd terminal board part 3b are formed in the same attachment shape.

  That is, the 1st terminal board part 3a has the bolt insertion hole 3c which fastens the stud bolt 105c as a mounting structure to the battery terminal 105. As shown in FIG. And the 2nd terminal board part 3b is also set as the structure which provided the same bolt insertion hole 3c as the 1st terminal board part 3a as an attachment structure.

  Therefore, the end portion (connection terminal portion) of the output-side electrical circuit 5 shown in FIG. 1 is fastened to the second terminal plate portion 3b by the bolt 13 inserted through the bolt insertion hole 3c.

  The fusible link 9 according to the present embodiment includes a narrow strip-shaped connecting substrate portion 91 integrally formed with the first terminal plate portion 3a and the second terminal plate portion 3b by punching a metal plate, It is formed of a low melting point metal chip 95 fastened on the connecting substrate portion 91 by a caulking piece 93 integrally formed with the connecting substrate portion 91. The low melting point metal chip 95 is fixed by caulking by the caulking piece 93, and is then melted by heating and is installed in a state where it is welded to the connecting substrate portion 91.

  As shown in FIGS. 3 and 4, the bus bar 3 of the present embodiment has a distance X from the bent portion 31 to the mounting portion (bolt insertion hole 3 c) of the first terminal plate portion 3 a and the bent portion 31. The distance Y from the mounting portion (bolt insertion hole 3c) to the second terminal plate portion 3b is made equal.

  In the bus bar 3 of the present embodiment, the capacity of the fusible link 9 according to the rating of the output-side electrical circuit 5 is set at both ends of the connecting board portion 91 on which the low melting point metal chips 95 are welded as shown in FIG. This is done by adjusting the resistance value of the section L1 between the sections.

  However, the actual fusing characteristics of the fusible link 9 are affected by the resistance characteristics and heat dissipation characteristics of the entire conductive path from the battery post 109b to the output-side electrical circuit 5, and as shown in FIG. It is necessary to consider resistance characteristics and heat dissipation characteristics in the section L2 including the end of the side electrical circuit 5.

  Therefore, in the bus bar 3 of the present embodiment, the width dimension M1 of the first terminal plate portion 3a, the second dimension, in order to make the fusing characteristics of the fusible link 9 more highly correspond to the rating of the output side electrical circuit 5. The width M2 of the terminal plate portion 3b, the distance S1 from the mounting portion (bolt insertion hole 3c) of the first terminal plate portion 3a to the fusible link 9, the mounting portion (bolt insertion hole 3c) of the second terminal plate portion 3b. ) To the fusible link 9 is appropriately selected as a distance.

  Further, in the case of the present embodiment, a minute hole or dent 21 is provided around the fusible link 9, and the resistance characteristic of each region W1, W2 is adjusted by adjusting the number of the equipment. I am doing so.

  In the case of the present embodiment, the resistance characteristics of the regions W1 and W2 are set to different values by selecting the dimensions M1, M2, S1, and S2 and selecting the number of the holes or dents 21. .

  Specifically, for example, when the first terminal plate portion 3a is connected to the battery terminal 105 as shown in FIG. 1, the fusible link 9 functions as 120A and is shown in FIG. As described above, when the second terminal plate portion 3b is connected to the battery terminal 105, the resistance characteristics of the regions W1 and W2 are set so that the rating of the fusible link 9 functions as 100A. ing.

  In the fuse unit 1 according to the embodiment described above, the first terminal plate portion 3a and the second terminal plate portion 3b of the bus bar 3 are formed in the same mounting shape, and thus are shown in FIG. In this manner, the first terminal plate portion 3a is attached to the battery terminal 105, and the second terminal plate portion 3b is attached to the battery terminal 105 as shown in FIG. Any of these can be used.

  Accordingly, if the resistance characteristic is changed between the first terminal plate portion 3a side and the second terminal plate portion 3b side across the fusible link 9, as in the above embodiment, the first terminal plate connected to the battery terminal 105 is connected. The resistance characteristic between the battery terminal 105 and the fusible link 9 can be changed only by changing the mounting direction with respect to the battery terminal 105 without changing the design such as the shape change of the one terminal plate portion 3a. A change in resistance characteristics between the battery terminal 105 and the fusible link 9 corresponding to a change in the rating on the output side electrical circuit 5 side or the like can be handled without cost, and versatility is improved.

  Furthermore, in the case of the fuse unit 1 of the above embodiment, even when the mounting direction with respect to the battery terminal 105 is changed and the second terminal plate portion 3b is mounted on the battery terminal 105, the output-side electrical circuit 5 Since the connection position of the output side electrical circuit 5 is not changed, the resistance characteristic between the battery terminal 105 and the fusible link 9 is changed while maintaining the compatibility of the connectivity of the output side electrical circuit 5, It is possible to respond to changes in ratings.

  Moreover, in the bus bar 3 of the said embodiment, although the fusible link 9 was equipped between the bending part 31 and the 2nd terminal board part 3b, the installation position of the fusible link 9 is the bending part 31 and the mounting position. You may make it provide between the 1st terminal board parts 3a.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

It is a perspective view which shows the normal attachment direction to the battery of one Embodiment of the fuse unit for battery terminal attachment which concerns on this invention. It is a perspective view of the state which removed the output side electrical circuit from the 2nd terminal board part of the fuse unit for battery terminal attachment shown in FIG. It is a perspective view which shows the structure of the bus-bar currently used for the fuse unit for battery terminal attachment shown in FIG. It is a dimension explanatory drawing of the unfolding state of the bus bar shown in FIG. It is a perspective view when the 2nd terminal board part of the fuse unit for battery terminal attachment of one Embodiment is connected to the battery terminal. It is a perspective view which shows direction of the bus bar in the fuse unit for battery terminal attachment shown in FIG. It is a perspective view of the conventional fuse unit for battery terminal attachment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery terminal mounting fuse unit 3 Bus bar 3a 1st terminal board part 3b 2nd terminal board part 3c Bolt insertion hole 5 Output side electric circuit 9 Fusible link 105 Battery terminal 105a Post connection part 105b Plate part 105c Stud bolt 109 Battery 109a Ridge part 109b Battery post

Claims (2)

A metal plate bus bar having a first terminal plate portion on one end side connected to the battery terminal and a second terminal plate portion on the other end side connected to the output-side electrical circuit, and the bus bar connected to the ridge line portion of the battery A resin fuse housing that is housed in an L-shape that straddles
The bus bar has an overcurrent either between the bent portion bent along the ridge line portion of the battery and the first terminal plate portion or between the bent portion and the second terminal plate portion. A battery terminal mounting fuse unit provided with a fusible link that conducts conductive connection between terminal plate parts so as to be melted by
The battery terminal mounting fuse unit, wherein the first terminal plate portion and the second terminal plate portion are formed in the same mounting shape.   2. The distance X from the bent portion to the mounting portion of the first terminal plate portion is made equal to the distance Y from the bent portion to the mounting portion of the second terminal plate portion. The fuse unit for battery terminal installation described in 1.

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