JP2022080563A - Bus bar and electronic component unit - Google Patents

Abstract

To provide a bus bar enabling downsizing while suppressing exothermic heat.SOLUTION: A bus bar 12 is a planar bus bar 12 for distributing electric power supplied from a battery 18 to a plurality of electric components 21-24. The bus bar 12 includes an electric power source connection part 31 to which the battery 18 is connected, and a bus bar body part 32 to which the plurality of electric components 21-24 is connected at intervals in a lengthwise direction X. The bus bar body part 32 has a narrowed width part 33 whose width becomes smaller as the same goes further in the lengthwise direction X from the electric power source connection part 31.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to busbars and electronic component units.

Conventionally, a vehicle is provided with a power source such as a battery and a plurality of electrical components, and is equipped with an electronic component unit including a flat plate-shaped bus bar for distributing the electric power supplied from the power source to the plurality of electrical components. (See, for example, Patent Document 1). The electronic component unit includes a bus bar, electronic components such as a plurality of fuses, and an accommodating member for accommodating the bus bar and the plurality of electronic components. The bus bar includes a power supply connection portion to which a power supply is connected, and a bus bar main body portion to which a plurality of electrical components are connected at intervals in the length direction.

Japanese Unexamined Patent Publication No. 2017-135799

However, in a bus bar as described above, since the width of the bus bar main body is constant in the length direction, a large mounting space corresponding to the shape is required. That is, a large mounting space having a substantially rectangular shape when viewed from the thickness direction of the bus bar is required. If the width of the bus bar is reduced as a whole, heat is likely to be generated.

The present disclosure has been made to solve the above problems, and an object thereof is to provide a bus bar and an electronic component unit capable of miniaturization while suppressing heat generation.

The bus bar of the present disclosure is a flat plate-shaped bus bar for distributing electric power supplied from a power source to a plurality of electrical components, and the power connection portion to which the power source is connected and the plurality of the electrical components are in the length direction. The bus bar main body is provided with a bus bar main body connected to the bus bar at intervals, and the bus bar main body has a narrowed portion whose width becomes smaller as the distance from the power connection portion increases in the length direction.

The electronic component unit of the present disclosure includes an electron including the bus bar, a plurality of electronic components connected between the bus bar and the electrical component, and an accommodating member for accommodating the bus bar and the plurality of electronic components. The component unit, the accommodating member, has a narrowed accommodating portion whose width is reduced according to the narrowed portion.

According to the bus bar and the electronic component unit of the present disclosure, it is possible to reduce the size while suppressing heat generation.

FIG. 1 is a schematic diagram of an electronic component unit according to an embodiment. FIG. 2 is a schematic diagram for explaining a manufacturing process of a bus bar in one embodiment.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
The busbar of this disclosure is
[1] A flat plate-shaped bus bar for distributing electric power supplied from a power source to a plurality of electrical components, and a power connection portion to which the power source is connected and the plurality of the electrical components are spaced apart in the length direction. The bus bar main body is provided with a bus bar main body to be held and connected, and the bus bar main body has a narrowed portion whose width becomes smaller as the distance from the power supply connecting portion increases in the length direction.

According to the same configuration, since the bus bar main body has a narrowed portion whose width becomes smaller as the distance from the power supply connection portion increases in the length direction, it is possible to reduce the size as compared with, for example, a bus bar having a constant width. Become. Further, since the current flowing in the bus bar main body is small at a position far from the power supply connection in the length direction, it is difficult to generate heat even in a small width part.

[2] It is preferable that the width of the reduced width portion is linearly reduced.
According to the same configuration, since the width of the reduced width portion is linearly reduced, it is easier to design and manufacture than, for example, a non-linearly reduced width portion.

[3] The outer shape seen from the plate thickness direction is preferably a shape that becomes one rectangle by combining the two.
According to the same configuration, the outer shape seen from the plate thickness direction is a shape that becomes one rectangular by combining the two, so for example, by cutting a rectangular plate or a strip-shaped plate, waste of the material is reduced. Can be manufactured.

The electronic component unit of the present disclosure is
[4] An electronic component unit including the bus bar, a plurality of electronic components connected between the bus bar and the electrical components, and an accommodating member for accommodating the bus bar and the plurality of electronic components. The accommodating member has a reduced accommodating portion whose width is reduced according to the reduced width portion.

According to the same configuration, the accommodating member has a narrowed accommodating portion whose width becomes smaller according to the contracted width portion of the bus bar. It can be installed in a position where space cannot be secured.

[5] The plurality of electronic components include fuses having different capacities, and it is preferable that the fuse having a small capacity is connected to a position farther from the power supply connection portion than the fuse having a large capacity.

According to the same configuration, a fuse with a small capacity is connected to a position farther from the power supply connection than a fuse with a large capacity, so that the current flowing in the bus bar body farther from the power supply connection in the length direction is smaller. Therefore, it becomes more difficult to generate heat even in a part where the width of the bus bar is small.

[Details of Embodiments of the present disclosure]
Specific examples of the electronic component unit of the present disclosure will be described below with reference to the drawings. In each drawing, for convenience of explanation, a part of the configuration may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ in each drawing. The term "parallel" or "orthogonal" in the present specification includes not only the case of strictly parallel or orthogonal, but also the case of being substantially parallel or orthogonal within the range in which the action and effect in the present embodiment are exhibited. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

[Configuration of electronic component unit 11]
As shown in FIG. 1, the electronic component unit 11 includes a bus bar 12, fuses 13 to 16 as a plurality of electronic components, and an accommodating member 17.

[Structure of bus bar 12]
The bus bar 12 is made of a conductive metal. The bus bar 12 has a flat plate shape. The bus bar 12 is for distributing the electric power supplied from the battery 18 as a power source to a plurality of electrical components 21 to 24.

The bus bar 12 includes a power supply connection unit 31 to which the battery 18 is connected, and a bus bar main body unit 32 to which a plurality of electrical components 21 to 24 are connected at intervals in the length direction X. The bus bar main body 32 has a narrowed portion 33 whose width becomes smaller as the distance from the power connection portion 31 increases in the length direction X. The width is a length orthogonal to the length direction X and orthogonal to the plate thickness direction.

The width of the narrowed portion 33 is linearly reduced. In other words, the width of the narrowed portion 33 becomes smaller in the length direction X to a certain degree. That is, one of the narrowed width portions 33 is a straight line A along the length direction X, and the other in the width direction is a straight line B inclined with respect to the length direction X. The power supply connection portion 31 is formed so as to be wider than the narrowed width portion 33, and more specifically, is formed so as to protrude from the straight line B in a direction of increasing width. The power connection unit 31 has a connection hole 31a. The terminal 42 of the wiring 41 connected to the high potential power supply of the battery 18 is connected to the power supply connection unit 31. In the present embodiment, the power supply connection portion 31 and the terminal 42 are fastened by a fastening member 43 that is fastened through the connection hole 31a of the power supply connection portion 31 and the connection hole 42a of the terminal 42.

Further, as shown in FIG. 2, the outer shape of the bus bar 12 seen from the plate thickness direction is a shape that becomes one rectangle 51 by combining the two. In other words, the bus bar 12 has a shape in which two can be formed without waste by cutting the rectangle 51. The bus bar 12 of the present embodiment is manufactured by cutting the strip-shaped plate member 52 along the cutting line 53 shown by the two-dot chain line in FIG. The connection hole 31a is formed by punching.

[Structure of fuses 13 to 16]
The fuses 13 to 16 are electronic components connected between the bus bar 12 and the electrical components 21 to 24. The fuses 13 to 16 are connected to the bus bar main body 32 at intervals in the length direction X. That is, the plurality of electrical components 21 to 24 are connected to the bus bar main body 32 via the fuses 13 to 16. The fuses 13 to 16 have, for example, a first terminal and a second terminal, the first terminal is directly in contact with the bus bar main body 32 and connected, and the second terminal is an electrical component 21 to 21 via wiring. Connected to 24. The plurality of fuses 13 to 16 of the present embodiment have different capacities. That is, the plurality of electrical components 21 to 24 have different rated currents, and fuses 13 to 16 having different capacities are adopted according to the rated currents. The fuse having a small capacity is connected to the bus bar main body 32 at a position farther from the power supply connection portion 31 than the fuse having a large capacity. Specifically, in the present embodiment, the plurality of fuses 13 to 16 all have different capacities, and the smaller the capacity of the fuses, the farther they are connected from the power supply connection portion 31.

[Structure of accommodating member 17]
The accommodating member 17 accommodates the bus bar 12 and a plurality of fuses 13 to 16. The accommodating member 17 has a narrowed accommodating portion 61 whose width is reduced according to the narrowed portion 33 of the bus bar 12. In FIG. 1, the accommodating member 17 is schematically shown by a frame, but the accommodating member 17 is, for example, a resin molded product that covers and holds most of the outer surface of the bus bar 12 and the fuses 13 to 16. be.

Next, the operation of the electronic component unit 11 configured as described above will be described.
The electric power supplied from the battery 18 to the power connection portion 31 of the bus bar 12 is distributed to a plurality of electrical components 21 to 24 connected at intervals X in the length direction X of the bus bar main body portion 32. At this time, the current flowing in the bus bar main body portion 32 becomes smaller as the distance from the power supply connection portion 31 increases in the length direction X.

Next, the effects of the above embodiment will be described below.
(1) Since the bus bar main body 32 has a narrowed portion 33 whose width becomes smaller as the distance from the power connection portion 31 increases in the length direction X, for example, the bus bar 12 is smaller than the one having a constant width. Can be converted. In the bus bar main body 32, the current flowing at a position far from the power supply connection portion 31 in the length direction X is small, so that it is difficult to generate heat even in a portion having a small width.

(2) Since the narrowed width portion 33 has a linearly reduced width, it is easier to design and manufacture than, for example, a non-linearly reduced width portion.
(3) Since the outer shape of the bus bar 12 as seen from the plate thickness direction is a shape that becomes one rectangular 51 by combining the two, for example, the material is obtained by cutting the strip-shaped plate 52 as in the present embodiment. Can be manufactured with less waste.

(4) Since the accommodating member 17 has a narrowed accommodating portion 61 whose width becomes smaller according to the contracted width portion 33 of the bus bar 12, for example, due to the presence of another member 71, a large rectangular mounting portion that is substantially rectangular when viewed from the plate thickness direction. It can be installed in a position where space cannot be secured.

(5) In the plurality of fuses 13 to 16, the fuse having a small capacity is connected to a position farther from the power supply connection portion 31 than the fuse having a large capacity. Therefore, in the bus bar main body 32, the current flowing at a position far from the power supply connection portion 31 in the length direction X becomes smaller, and heat generation is less likely to occur even in a portion where the width of the bus bar 12 is small.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
-In the above embodiment, the width of the narrowed portion 33 is linearly reduced, but the width is not limited to this, and for example, the width may be non-linearly reduced. That is, the narrowed width portion 33 may have a reduced width to a different degree in the length direction X, and is, for example, a shape in which at least one of the width directions is curved with respect to the length direction X. May be good.

-In the above embodiment, the outer shape of the bus bar 12 when viewed from the plate thickness direction is a shape that becomes one rectangle 51 by combining the two, but the present invention is not limited to this, and even if the two are combined, 1 The shape may not be one rectangle 51.

In the above embodiment, in the plurality of fuses 13 to 16, the fuse having a small capacity is connected to a position farther from the power supply connection portion 31 than the fuse having a large capacity, but the present invention is not limited to this, and for example, a plurality of fuses. There may be an exception in the fuses 13 to 16. For example, the fuse 13 having the largest capacity and the fuse 14 having the second largest capacity may be connected at opposite positions. Further, in the above embodiment, the plurality of fuses 13 to 16 all have different capacities, but the capacity is not limited to this, and for example, some fuses may have the same capacity, and in that case, the capacities are the same. The fuses are preferably connected next to each other.

In the above embodiment, the accommodating member 17 has a narrowed accommodating portion 61 whose width is reduced according to the narrowed portion 33 of the bus bar 12, but is not limited to this, and has a narrow accommodating portion 61. It may not be. For example, the accommodation member 17 does not have the reduced width accommodating portion 61, and the width is substantially constant, and the bus bar main body portion 32 has the reduced width portion 33, so that other parts are accommodated and held in the vacant space. May be good.

-In the above embodiment, the power supply connection portion 31 has a connection hole 31a and is configured to be fastened to the terminal 42 connected to the battery 18 by the fastening member 43, but the present invention is not limited to this, and for example, the terminal. It may be configured to be crimped and fixed to 42.

-In the above embodiment, the electronic component unit 11 is provided with four fuses 13 to 16, but may be provided with two, three, or five or more fuses.

11 Electronic component unit 12 Bus bar 13-16 Fuse (electronic component)
17 Accommodating member 18 Battery (power supply)
21 to 24 Electrical components 31 Power supply connection part 31a Connection hole 32 Bus bar main body 33 Reduced width part 41 Wiring 42 Terminal 42a Connection hole 43 Fastening member 51 Rectangle 52 Plate material 53 Cutting line 61 Reduced width accommodating part 71 Other members A Straight line B Straight line X length direction

Claims (5)

A flat plate-shaped bus bar for distributing the power supplied from the power supply to multiple electrical components.
The power supply connection part to which the power supply is connected and
A bus bar main body, to which a plurality of the electrical components are connected at intervals in the length direction, is provided.
The bus bar main body has a narrowed portion whose width becomes smaller as the distance from the power connection portion increases in the length direction. The bus bar according to claim 1, wherein the narrowed portion has a linearly reduced width. The bus bar according to claim 1 or 2, wherein the outer shape seen from the plate thickness direction is a shape that becomes one rectangle by combining the two. The bus bar according to any one of claims 1 to 3,
A plurality of electronic components connected between the bus bar and the electrical components,
An electronic component unit including the bus bar and an accommodating member for accommodating the plurality of electronic components.
The accommodating member is an electronic component unit having a narrowed accommodating portion whose width is reduced according to the narrowed portion. The plurality of electronic components include fuses having different capacities.
The electronic component unit according to claim 4, wherein the fuse having a small capacity is connected to a position farther from the power supply connection portion than the fuse having a large capacity.

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