JPH07212940A - High-voltage large current branching board for electric car - Google Patents

Abstract

PURPOSE:To reduce the size of a distribution board, simplify the connection work and maintenance and improve the impact-resistance. CONSTITUTION:A partition plate 12 is provided in a case 11 near its center line in a direction parallel with the running direction of a car. Positive side connection conductors 23 and negative side connection conductors 22 are provided on both sides of the partition plate 12. Relays 15 and 16, fuses 17 and 18, electrical components, and a battery are connected with the respective connection conductors. The cross-sectional areas of both connection conductors 22 and 23 are equal to the nominal cross-sectional areas of conventional cables.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage large-current distribution device for an electric vehicle which is applied to an electric vehicle using a battery as a driving source.

[0002]

2. Description of the Related Art In the case of a general automobile, since the rated voltage of each electric component is 24 VDC or less, the electric current is small, and the cable to be used may have a small nominal cross-sectional area, but an electric automobile using a battery as a drive source. In the case of a high-voltage large-current distribution device for use, the rated voltage of the power line is as high as DC48V to 400V, so the current is remarkably large and a cable with a large nominal cross-sectional area is required.

In such an electric vehicle using a battery as a driving source, it is conceivable to provide a distribution device in which electric parts such as relays and fuses are centrally arranged, like a junction box of a general automobile. The power distribution device is configured by arranging electric parts as shown in FIG. 4, for example.

That is, as shown in FIG. 4, a plurality of relays 2a and 2b and a fuse 3a are provided in a case 1 made of an insulating material.
And a plurality of fuses 3b attached to the fuse socket 4 are arranged. These electric parts are connected to each other in the case 1 by a cable 5 and penetrate the case 1 to supply a battery (not shown) or It is connected to various loads such as motors and lights.

[0005]

However, as described above, the cable 5 has a large nominal cross-sectional area. For example, when a current of 150 A flows, a cable having a nominal cross-sectional area of 38 mm ² must be used. Case 1 due to lack of sex
There is a problem in that the space for the cable 5 must be secured inside, which leads to an increase in the size of the entire apparatus and the handling of the cable 5 is troublesome.

By the way, in a switchboard installed in a factory or the like, as shown in FIG. 5, a plurality of power distribution devices 7 such as circuit breakers are arranged in a case 6, and the primary side and the secondary devices 2 of these devices 7 are arranged.
Each of the secondary distribution lines is distributed to the upper duct 8a and the lower duct 8b in the case 6 to facilitate connection work and maintenance of the distribution lines and distribution equipment.

On the other hand, as shown in FIG. 6, a wire harness W in an automobile is designed to pass through the central portion of the vehicle body 9 in consideration of impact resistance against a rear-end collision and the like. Also in the device, it is necessary to consider connection work and maintenance such as the above-mentioned switchboard and impact resistance such as the wire harness W.

Therefore, the present invention has been made to solve the above-mentioned problems, and achieves downsizing of the device,
The purpose is to simplify connection work, maintenance, and improve shock resistance.

[0009]

The invention according to claim 1 is
A high-voltage large-current distribution device for an electric vehicle mounted on an electric vehicle that uses a battery as a drive source, the case comprising: a case; an insulating partition plate disposed in the case; and the partition plate in the case. A plurality of electric parts such as relays and fuses arranged on both sides of the battery, and one side of the partition plate in the case near the partition plate and connected to the battery or various loads. A primary side connecting conductor to which a terminal is connected, and another side of the partition plate in the case, which is disposed in the vicinity of the partition plate and is connected to the battery or various loads and is connected to the terminals of the respective parts. It is characterized by having a secondary side connecting conductor.

Further, as described in claim 2, the partition plate may be arranged parallel to the front-rear direction of the vehicle body, and the both connecting conductors may be arranged in parallel with the partition plate.

Further, the outer or inner surface of the case made of an insulating material is coated with a metal having a high magnetic permeability,
Alternatively, it is also effective to coat the outer surface or the inner surface of the case made of a metal having high magnetic permeability with an insulating material.

[0012]

According to the first aspect of the present invention, since the electric parts and the battery are connected by the primary side connecting conductors and the secondary side connecting conductors on both sides of the partition plate at the center of the case, the cross-sectional areas of both connecting conductors are connected. Should be set to be equal to the nominal cross-sectional area of the conventional cable, it is not necessary to secure extra space in the case as in the conventional case, the device can be downsized, and There is no such inconvenience of handling, and connection work and maintenance can be simplified.

According to the second aspect of the present invention, the partition plate is arranged in parallel with the front-rear direction of the vehicle body, and the primary side and secondary side connecting conductors are arranged in parallel on the partition plate, whereby a rear impact or the like occurs. It is possible to secure the strength against a shock in the front-back direction due to.

Further, the case is formed of an insulating material and at least one of the outer surface and the inner surface thereof is coated with a metal having a high magnetic permeability, or the case is formed of a metal having a high magnetic permeability and the outer surface or the inner surface thereof. By coating at least one of them with an insulating material, the inside of the case can be electromagnetically shielded, and the influence of electromagnetic noise from the outside can be blocked.

[0015]

1 is a plan view of an embodiment of the present invention, FIG. 2 is a partial perspective view, and FIG. 3 is a different perspective view.

As shown in these figures, a case 11 made of an insulating material is provided, and an upper portion of the case 11 is constituted by a lid body (not shown) that can be opened and closed. A partition plate 12 made of an insulating material is erected parallel to the front-rear direction, and left and right insulation plates 13 are spaced apart by a predetermined distance in order to install connection conductors described later in parallel on both left and right sides of the partition plate 12. , 14 are erected, and the relay 15 is arranged on the left side of the left insulating plate 13 in the case 11, and
A plurality of relays 1 is provided on the right side of the right insulating plate 14 in the case 11.
6 is provided, two current limiting fuses 17 are provided above the relay 15 on the left side of the left insulating plate 13 in the case 11, and the relay is provided on the right side of the right insulating plate 14 in the case 11. 1
A plurality of current limiting fuses 18 are arranged above 6 and the respective current limiting fuses 18 are partitioned by an insulating plate 19 (see FIG. 3).

At this time, it is preferable to use a hydrogen gas sealed high current relay for each of the relays 15 and 16, which eliminates the need to secure an arc discharge distance in the vertical direction.

The left side of the left insulating plate 13 inside the case 11 is above the relay 15 and the right side of the right insulating plate 14 inside the case 11 is above the relay 11, as shown in FIG.
At the same time as partitioning the inside into upper and lower parts, insulating plates 20 and 21 for fixing the fuses 17 and 18 are installed.

Then, two negative side connecting conductors 22 as secondary side connecting conductors and positive side connecting conductors 23 as primary side connecting conductors made of copper, brass, aluminum and beryllium copper.
Are provided on both the left and right sides of the partition plate 12 in the vicinity of the partition plate 12, and the base portions 22a in the front-rear direction of both negative side connecting conductors 22 are arranged vertically between the partition plate 12 and the left insulating plate 13. The long base portions 23a are arranged between the partition plate 12 and the right insulating plate 14 in front of and behind the positive side connecting conductor 23, and as shown in FIG. At the rear end, upwardly extending pieces 22b are integrally formed, respectively, and at the upper ends of these extending pieces 22b, connecting pieces 22c are integrally formed so as to extend to the left, respectively.
The negative terminals of both fuses 17 are connected to 2c, and the base portion 22a, the extending piece 22b, and the connecting piece 22c form the both negative-side connecting conductors 22.

Further, a plurality of upward extending pieces 23b are integrally formed on the base portion 23a of the positive side connecting conductor 23, and extend rightward at the upper end of the frontmost extending piece 23b, and further beyond. An L-shaped piece 23c bent rearward is integrally formed, and the connecting piece 23 is integrally formed on the upper end of the remaining extending piece 23b and extends leftward.
d are formed respectively, and each fuse 18 is formed on the L-shaped piece 23c.
Of the fuse 17, the positive terminal of the fuse 17 is connected to the connecting piece 23d, and the base portion 23a, the extending piece 23b,
The L-shaped piece 23c and the connecting piece 23d constitute the positive side connecting conductor 23.

At this time, as shown in FIG. 2, through holes 24 are provided at the connecting positions of the connecting pieces 22c and 23d and the L-shaped pieces 23c with the fuses 17 and 18, and both insulating plates 20 are provided. , 21 is also provided below each through hole 24, a coil body called a metal nut or helisert is embedded in each through hole of both insulating plates 20 and 21, and a screw 26 is provided with a spring washer and a flat washer. The fuses 17 and 18 are fixed to the fuses 17 and 18 at the same time that the fuses 17 and 18 are electrically connected to the connecting conductors 22 and 23 by being screwed into these metal nuts or heliserts.

By the way, the base 2 of each connecting conductor 22, 23
The front ends of 2a and 23a penetrate the case 11 and are led out to the front thereof, and the forward ends of the derived bases 22a and 23a are connected to the output terminals of the battery or various loads such as motors and lights by cables. ing.

In addition, the fuse 1 of each connection conductor 22 and 23
A coating layer of a thermosetting resin such as epoxy, polyethylene, vinyl chloride, etc. is formed and insulated except for a portion electrically connected to 7, 18.

Therefore, the partition plate 12 at the center of the case 11
Since the negative side and positive side connecting conductors 22 and 23 are arranged on both sides of the relay conductors, and the relays 15 and 16 and the fuses 17 and 18 are connected by these connecting conductors 22 and 23, the disconnection of the respective connecting conductors 22 and 23 is performed. The area is the same as the conventional cable 5
By setting the cross section equal to the nominal cross-sectional area (see FIG. 4), it is not necessary to secure an extra space for the cable in the case 11 as in the conventional case, and the device can be downsized. It is possible to simplify the maintenance without the inconvenience of handling like the cable of.

Further, by using the hydrogen gas sealed type high current relays for the relays 15 and 16, it is not necessary to secure the arc discharge distance in the vertical direction, and the size in the vertical direction can be reduced.

Further, by arranging the negative side and positive side connecting conductors 22 and 23 on both sides of the partition plate 12, the partition plate 12
When the electric parts are arranged on both sides of the connection conductor 22,
23, select the one that is easy to connect to each part, arrange each part, and set the shape of each connection conductor 22, 23 according to the position of each part to achieve effective use of the space in the case 11. The device can be effectively downsized.

Further, the partition plate is arranged in parallel with the front-rear direction of the vehicle body, and the primary side and secondary side connecting conductors are arranged in parallel with this partition plate, so that the strength against the impact in the front-rear direction due to a rear-end collision or the like is improved. It can be ensured and reliability can be improved.

The case is made of an insulating material and at least one of the outer side surface and the inner side surface thereof is coated with a metal having a high magnetic permeability such as aluminum or iron, or the case is made of a metal having a high magnetic permeability such as aluminum or iron. The inner surface of the case can be electromagnetically shielded by forming at least one of its outer surface or inner surface with an insulating material, and the influence of electromagnetic noise from the outside can be blocked, improving reliability. Can be achieved.

The primary side and secondary side connecting conductors may be the negative side and positive side connecting conductors 22 and 23, respectively, and the connecting conductors 22 and 23 are limited to the shape of the above embodiment. Of course not.

Further, it goes without saying that the electric parts housed in the case 11 are not limited to the relays and fuses described above.

In the case 11, the relays 15,
The case 11 may be made of metal as long as sufficient insulation measures are taken for the fuses 16 and the fuses 17 and 18.

[0032]

According to the first aspect of the present invention, since the electric parts and the battery are connected to each other by the primary side connecting conductors and the secondary side connecting conductors on both sides of the partition plate in the central portion of the case, as in the conventional case. There is no need to secure extra space in the case, the device can be downsized, and there is no inconvenience of handling like conventional cables, and connection work and maintenance can be simplified. Suitable for electric vehicles.

According to the second aspect of the present invention, the partition plate is arranged in parallel with the front-rear direction of the vehicle body, and the primary side and secondary side connecting conductors are arranged in parallel on the partition plate, thereby causing a rear impact or the like. It is possible to secure the strength against an impact in the front-rear direction due to, and improve the reliability.

Further, the case is made of an insulating material and its outer surface or inner surface is coated with a metal having a high magnetic permeability, or the case is made of metal having a high magnetic permeability and at least one of the outer surface or the inner surface is formed. By coating with an insulating material, the inside of the case is electromagnetically shielded and the influence of electromagnetic noise from the outside can be blocked.
It is possible to improve reliability.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a part of FIG.

FIG. 3 is a perspective view of another part of FIG.

FIG. 4 is a plan view of a conventional example.

FIG. 5 is a schematic view of a general switchboard.

FIG. 6 is an explanatory diagram of a wiring harness routing state in a general automobile.

[Explanation of symbols]

 11 Case 12 Partition Plate 15,16 Relay 17,18 Fuse 22 Negative Side Connection Conductor 23 Positive Side Connection Conductor

Claims (5)

[Claims] 1. A high-voltage large-current distribution device for an electric vehicle mounted on an electric vehicle that uses a battery as a drive source, the case, a partition plate disposed substantially in the center of the case, and the case. A plurality of electric parts such as relays and fuses arranged on both sides of the partition plate inside, and arranged on one side of the partition plate in the case near the partition plate and connected to the battery or various loads And a primary side connecting conductor to which the terminal of each component is connected, and a terminal of each component that is disposed near the partition plate on the other side of the partition plate in the case and is connected to the battery or various loads. And a secondary-side connection conductor connected to the high-voltage large-current distribution device for an electric vehicle. 2. The high-voltage large-current distribution device for an electric vehicle according to claim 1, wherein the partition plate is arranged parallel to the front-rear direction of the vehicle body, and the both connecting conductors are arranged side by side on the partition plate. A high-voltage large-current distribution device for electric vehicles, which is characterized in that 3. The high-voltage large-current distribution device for an electric vehicle according to claim 1, wherein the case and the partition plate are made of an insulating material. 4. The case is made of an insulating material, and at least one of an outer side surface and an inner side surface thereof is coated with a metal having a high magnetic permeability.
Alternatively, the high-voltage large-current distribution device for an electric vehicle according to item 2. 5. The high voltage large size for an electric vehicle according to claim 1, wherein the case is made of a metal having a high magnetic permeability, and at least one of an outer side surface and an inner side surface of the case is coated with an insulating material. Current distribution device.