JP2001028822A - Laying structure of multi-voltage power transmission line for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for newly providing space at a grounding potential part by extending a low-voltage power transmission line along a high-voltage power transmission line between the high-voltage power transmission line and the grounding potential part. SOLUTION: On an insulating substrate 1a of an electric machine connection box 1, a first accommodation groove 1b is formed while the groove 1b is extended along the periphery part near a body 3 of the insulating substrate 1a, and the second accommodation groove 1c is formed while the groove 1c is extended between the first accommodation groove 1b and the periphery part near the body 3 of the insulating substrate 1a. Into the first accommodation groove 1b, a bus bar 7 for a high voltage being formed by matching with the first accommodation groove 1b is accommodated into the first accommodation groove 1b, and the bus bar 7 for the high voltage is connected to the positive electrode of a battery. Into the second accommodation groove 1c, a bus bar 5 for a low voltage being formed by matching with the first accommodation groove 1c is accommodated into the second accommodation groove 1c, and the bus bar 5 for the low voltage is connected to the positive electrode of the battery, thus eliminating the need for changing the component parts and layout of the electric machine connection box 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for arranging a power transmission line in a vehicle, and more particularly to a structure for arranging a high-voltage power transmission line and a low-voltage power transmission line in a vehicle.

[0002]

2. Description of the Related Art A vehicle is provided with a large number of power transmission lines for transmitting electric power and signals, such as bus bars in electric connection boxes such as junction boxes, relay boxes, and fuse boxes, and terminals for electric connection connectors. Is done.

[0003] If the power transmission line is too close to a ground potential portion such as a vehicle body or a ground terminal, creeping discharge may occur and electrical corrosion may occur. An interval is provided between the portion and the ground potential portion.

[0004] By the way, the voltage of the power transmitted on the power transmission line of a vehicle is 14 in the case of a general passenger car.
V × 14 × 2 for large vehicles such as buses and trucks
= 28V (both effective voltages) have been the mainstream until now, but especially in passenger cars, from the demand for improvement of load drive efficiency and drive at optimum efficiency for each load, the conventional single voltage The use of a power supply system that supplies electric power at various types of voltages is beginning to be considered.

More specifically, a power supply system in which a low voltage of 14 V as in the prior art and a high voltage of 42 V (both effective voltages), which is the maximum voltage that does not require significant changes in the specifications of the transmission system, is used. Recruitment is considered the most realistic.

[0006]

The use of a multi-voltage power supply system as described above is very useful for a load having a high driving efficiency when a high voltage is used. Sparks due to creeping discharge are likely to occur between the ground potential portion and the ground potential portion due to the occurrence of a large potential difference, and electrolytic corrosion is likely to occur in the case of the electrical junction box, the insulating substrate, or the housing of the connector. Is expected.

[0007] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a power transmission device having a plurality of types of electric power including electric power having a higher voltage than that of the conventional art, even if the electric power is transmitted in the vicinity of a ground potential portion of a vehicle, without placing a new space between the power source and the ground potential portion. It is an object of the present invention to provide an arrangement structure of a multi-voltage power transmission line for a vehicle that can be completed.

[0008]

According to a first aspect of the present invention, there is provided a vehicle multi-voltage power transmission line having a high voltage power transmission line close to a ground potential portion. In a vehicle provided with a low-voltage power transmission line, the low-voltage power transmission line extends along the high-voltage power transmission line between the high-voltage power transmission line and the ground potential portion. It is characterized by the following.

In addition, the arrangement structure of the multi-voltage power transmission line for a vehicle according to the present invention described in claim 2 is the same as the arrangement structure of the multi-voltage power transmission line for a vehicle according to the invention described in claim 1, The high-voltage power transmission line and the low-voltage power transmission line are a high-voltage bus bar and a low-voltage bus bar respectively provided in an electric connection box, and the ground potential portion is the electric connection box in the vehicle body. In the vicinity of the body.

Further, the arrangement structure of the multi-voltage power transmission line for a vehicle according to the present invention described in claim 3 is the same as the arrangement structure of the multi-voltage power transmission line for a vehicle according to the invention described in claim 1, The high-voltage power transmission line and the low-voltage power transmission line are high-voltage terminals and low-voltage terminals provided on a connector, and the ground potential portion is a ground terminal provided on the connector.

According to the first aspect of the present invention, the low-voltage power transmission line extends between the high-voltage power transmission line and the ground potential portion. Therefore, the closest to the high-voltage power transmission line is the low-voltage power transmission line, not the ground potential portion.

Therefore, the potential difference between the high-voltage power transmission line and the different voltage portion closest to the high-voltage power transmission line is lower than the high voltage value on the high-voltage power transmission line. The value of the low voltage power transmission line is lower than the value of the high voltage on the high voltage power transmission line. Of low voltage.

According to a second aspect of the present invention, there is provided a multi-voltage power transmission line for a vehicle according to the first aspect of the present invention. Since the low-voltage bus bar that transmits power of a lower voltage than the high-voltage bus bar is disposed between the body portion near the electric connection box and the high-voltage bus bar, the high-voltage bus bar transmits. Even if the voltage of the electric power is higher than before, it is not necessary to further separate the high-voltage bus bar from the body portion near the electric connection box.

Furthermore, according to the structure for disposing a multi-voltage power transmission line for a vehicle according to the present invention described in claim 3, claim 2 is provided.
In the arrangement structure of the vehicular multi-voltage power transmission line of the present invention described in the above, between the high voltage terminal and the ground terminal of the connector, since a low voltage terminal having a lower potential than the high voltage terminal is arranged, Even if the potential of the high voltage terminal is higher than before,
There is no need to separate the ground terminal and terminals other than the ground terminal more than before.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle multi-voltage power transmission line according to an embodiment of the present invention;

FIG. 1 is a perspective view conceptually showing an electric junction box employing an arrangement structure according to a first embodiment of the present invention and the periphery thereof. Reference numeral 1 in FIG. 1 denotes, for example, a junction box or the like. An electric connection box 3 such as a relay box and a fuse box indicates a vehicle body (corresponding to a ground potential portion) arranged near the electric connection box 1, and the body 3 is formed of a steel plate and is grounded. It is kept at the potential.

On the insulating substrate 1a of the electric junction box 1,
A first accommodation groove 1b having a concave cross section is formed so as to extend along the peripheral portion of the insulating substrate 1a near the body 3, and the first accommodation groove 1b and the first accommodation groove 1b near the body 3 of the insulating substrate 1a are formed. A second accommodation groove 1c having a concave cross section is formed so as to extend between the second accommodation groove 1c and the peripheral portion.

The first accommodating groove 1b is provided with a high-voltage bus bar 7 formed in accordance with the first accommodating groove 1b.
(Corresponding to a high-voltage power transmission line), and the high-voltage bus bar 7 is connected to an unillustrated 42 V (effective voltage).
It is connected to the positive electrode of the battery.

On the other hand, the second housing groove 1c has the second
Bus bar 5 for low voltage formed according to accommodation groove 1c
(Corresponding to a low-voltage power transmission line), and the low-voltage bus bar 5 has an unillustrated 14 V (effective voltage).
It is connected to the positive electrode of the battery.

In the first embodiment having such a configuration, the electric connection box 1 in which the low-voltage bus bar 5 and the high-voltage bus bar 7 are mounted on the insulating substrate 1a is located near the body 3 held at the ground potential. , The low-voltage bus bar 5 to which low-voltage power from the 14 V battery is transmitted is closer to the body 3 than the high-voltage bus bar 7 to which high-voltage power from the 42 V battery is transmitted. Will be located at

Therefore, even if a creeping discharge occurs in the electric junction box 1 due to the power transmitted by the high-voltage bus bar 7, the discharge is generated between the high-voltage bus bar 7 and the low-voltage bus bar 5 closer to the high-voltage bus bar 7 than the body 3. The potential difference between the generated high-voltage bus bar 7 and the low-voltage bus bar 5 that determines the discharge power is suppressed to 28 V, which is lower than 42 V that is the potential difference between the high-voltage bus bar 7 and the body 3.

Also, creeping discharge with the body 3 on the low potential side occurs not with the high-voltage bus bar 7 but with the low-voltage bus bar 5 closer to the body 3. The potential difference between the body 3 for determining the discharge power and the low-voltage bus bar 5 is also different from the high-voltage bus bar 7 and the body 3.
And 14 V, which is lower than 42 V, which is a potential difference from the above.

For this reason, it is higher than a bus bar of an electric junction box of a vehicle having only a normal 14 V battery.
Even if the high-voltage bus bar 7 that transmits the electric power of 42 V is provided, the electric connection box 1 is made less likely to cause electrolytic corrosion,
It is not necessary to enlarge the electric connection box 1 or to separate the electric connection box 1 from the body 3 in order to provide a sufficient space between the high-voltage bus bar 7 and the body 3, and to change the components and layout of the electric connection box 1. Can be done.

In the first embodiment described above, the case where the arrangement structure of the present invention is adopted for the electric connection box 1 has been described. However, the present invention is also applicable to a connector for electric connection.

That is, as shown in FIG. 2 which is a plan view of an end face of a connector employing an arrangement structure according to a second embodiment of the present invention, the connector housing 11 made of an insulating resin material constituting the connector 10 Of the plurality of exposed terminals, a low voltage terminal 15 (corresponding to a low voltage power transmission line) connected to a 14 V battery (not shown) is provided around a ground terminal 13 (corresponding to a ground potential portion) held at the ground potential. ) Are arranged, and around these low-voltage terminals 15, 42V (not shown)
A plurality of high-voltage terminals 17 (corresponding to high-voltage power transmission lines) connected to the battery are arranged, and
7 may be configured to be adjacent only to the low voltage terminal 15.

With such a configuration, even when creeping discharge occurs from each of the high voltage terminals 17 along the end surface of the connector housing 11, the potential difference that determines the discharge power is different between the high voltage terminal 17 and the ground terminal 13. , Which is lower than 42V which is the potential difference between the high voltage terminal 17 and the low voltage terminal 15 disposed closest thereto, which is 28V.

Also, creeping discharge in which the ground terminal 13 is on the low potential side is generated not with the high voltage terminal 17 but with the low voltage terminal 15 closer to the ground terminal 13. The potential difference between the ground terminal 13 and the low voltage terminal 15 which determine the discharge power is also determined by the high voltage terminal 17 and the ground terminal 13.
And 14 V, which is lower than 42 V, which is a potential difference from the above.

For this reason, even if the connector 10 is provided with a high voltage terminal 17 for transmitting 42V power, which is higher than the ungrounded terminal of the connector 10 of a vehicle having only a normal 14V battery, the connector housing 11 The high voltage terminal 7 and the ground terminal 13
Therefore, it is not necessary to increase the size of the connector housing 11 so that a sufficient space is provided between the connector housing 11 and the layout of the components and terminals of the connector.

In the first and second embodiments, the high voltage potential of the electric connection box 1 and the connector 10 is set to 42 V, and the low voltage potential is set to 14 V (effective voltage). And the potential difference between the discharges generated in the connector 10 is 28 V and 14 V (both are effective voltages). The voltage values of these high and low potentials and the potential difference between these and the ground potential are 42 V,
The value is not limited to 14 V, 28 V, and 14 V, and can be changed to an arbitrary value according to the electric resistance of the insulating board 1 a of the electric connection box 1 and the connector housing 11.

Further, in the first and second embodiments described above, the case where the present invention is applied to the electric junction box 1 and the connector 10 has been described. Printed circuit board having a high-potential conductive pattern and a low-potential conductive pattern held at each potential, and a member having a high-potential conductive pattern and a low-potential conductive pattern held at each high and low potential and held at a ground potential It is needless to say that the same can be applied to a printed circuit board arranged in the vicinity of.

Further, in the above-described first and second embodiments, the case where there are two batteries of different voltages and two high and low power transmission lines corresponding to each battery will be described as an example. However, it goes without saying that the present invention is applicable even when there are three or more power transmission lines having different potentials.

[0032]

As described above, according to the arrangement of the multi-voltage power transmission line for a vehicle according to the first aspect of the present invention, the high-voltage power transmission line and the low-voltage power In a vehicle provided with a transmission line, the low-voltage power transmission line extends along the high-voltage power transmission line between the high-voltage power transmission line and the ground potential portion.

For this reason, the potential difference between the high-voltage power transmission line or the ground potential portion of the vehicle and the different voltage portion closest to them is made lower than the value of the high voltage on the high-voltage power transmission line, and Just because the voltage of the power transmitted by the power transmission line is higher than before, it is not necessary to make the gap between the high-voltage power transmission line and the ground potential portion larger than before, so that the high-voltage power transmission in the vehicle can be performed. The generation of a new surplus space near the line can be prevented.

Further, according to the structure for arranging a multi-voltage power transmission line for a vehicle according to the present invention as set forth in claim 2, according to the structure for arranging a multi-voltage power transmission line for a vehicle according to the invention as set forth in claim 1, The high-voltage power transmission line and the low-voltage power transmission line are a high-voltage bus bar and a low-voltage bus bar provided in an electric junction box, respectively, and the ground potential portion is the electric power of the vehicle body. The structure is a body part near the junction box.

For this reason, when the electric connection box is disposed on the vehicle, even if the voltage of the power transmitted by the high-voltage bus bar is higher than before, the high-voltage bus bar is moved from the body near the electric connection box. The electric junction box is enlarged to secure the space between the high-voltage bus bar and the nearby body part by eliminating the need to separate as described above, and the extra space around the electric junction box due to the separation from the nearby body part The generation of space can be prevented.

Further, according to the arrangement structure of the multi-voltage power transmission line for a vehicle according to the present invention described in claim 3, the claim 2 is provided.
In the arrangement structure of the multi-voltage power transmission line for a vehicle according to the present invention, the high-voltage power transmission line and the low-voltage power transmission line are a high-voltage terminal and a low-voltage terminal provided on a connector, The ground potential portion is a ground terminal provided on the connector.

For this reason, in configuring the connector including the ground terminal, even if the potential of the high-voltage terminal is higher than the conventional one, it is not necessary to further separate the ground terminal from the terminals other than the ground terminal. Thus, it is possible to prevent the connector from becoming large due to an increase in the terminal interval.

[Brief description of the drawings]

FIG. 1 is a perspective view conceptually showing an electric junction box employing an arrangement structure according to a first embodiment of the present invention and the periphery thereof.

FIG. 2 is a plan view of an end face of a connector adopting an arrangement structure according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box 3 Body (ground potential part) 5 Low voltage bus bar (low voltage power transmission line) 7 High voltage bus bar (high voltage power transmission line) 10 Connector 13 Ground terminal (ground potential part) 15 Low voltage terminal ( Low voltage power transmission line) 17 High voltage terminal (High voltage power transmission line)

Claims (3)

[Claims] 1. A vehicle in which a high-voltage power transmission line and a low-voltage power transmission line are disposed adjacent to a ground potential portion, wherein the high-voltage power transmission line and the ground potential portion are connected between the high-voltage power transmission line and the ground potential portion. A structure for disposing a multi-voltage power transmission line for a vehicle, wherein the low-voltage power transmission line extends along the voltage power transmission line. 2. The high-voltage power transmission line and the low-voltage power transmission line are a high-voltage bus bar and a low-voltage bus bar provided in an electric junction box, respectively, and the ground potential portion is a body of the vehicle. 2. The arrangement structure of a multi-voltage power transmission line for a vehicle according to claim 1, wherein the body portion is a body portion near the electric connection box. 3. The high-voltage power transmission line and the low-voltage power transmission line are a high-voltage terminal and a low-voltage terminal provided on a connector, and the ground potential portion is a ground terminal provided on the connector. 2. An arrangement structure of a multi-voltage power transmission line for a vehicle according to claim 1.