JP6452057B2 - Electrical connection structure - Google Patents

Description

  The present invention relates to an electrical connection structure for electrically connecting devices mounted on a vehicle.

  In recent years, plug-in HEVs (Hybrid Electric Vehicles) or EVs (Electric Vehicles) have become widespread. Such a vehicle has a battery, a charging device that charges the battery from an external power supply (commercial power supply), an inverter that converts a direct current from the battery into an alternating current, and a vehicle wheel that is driven by the alternating current from the inverter. A motor to be operated (see, for example, Patent Document 1). These devices are electrically connected.

JP 2012-240477 A

  However, the technique of Patent Document 1 uses a harness as means for electrical connection, and devices housed in different housings are connected to each other through the harness, and thus have the following problems.

  That is, since the harness is exposed to the outside of each housing, it is necessary to perform a process of covering the harness with an insulator to ensure safety, or to perform a waterproof process on the harness. Therefore, there exists a subject that the cost for it takes.

  Moreover, when using a harness, it is necessary to give a special process to the connection part of a harness in each device used as connection object. Therefore, there exists a subject that the cost for it takes.

  An object of the present invention is to provide an electrical connection structure capable of ensuring safety and achieving complete waterproofing without incurring costs.

An electrical connection structure according to an aspect of the present invention is an electrical connection structure including a first power converter and a second power converter, and the first power converter includes a first housing. The second power converter is provided in a second space in a second casing, and the first casing and the second casing are fastened to each other. The first space and the second space are partitioned by at least the first housing, and an opening provided in the first housing that partitions the first space and the second space. have a busbar penetrating the, wherein the said second space of the second housing, a configuration in which electrical connection box for relaying electrical connection is provided.
Moreover, the electrical connection structure which concerns on 1 aspect of this invention is an electrical connection structure which has a 1st power converter and a 2nd power converter, Comprising: The said 1st power converter is 1st. The second power converter is provided in a second space in the second casing, and the first casing and the second casing are provided in a first space in the casing. The first space and the second space are fastened and partitioned by at least the first casing, and are provided in the first casing that partitions the first space and the second space. A portion having a bus bar penetrating through the opening and forming the opening is configured to be covered with an insulating portion.
Moreover, the electrical connection structure which concerns on 1 aspect of this invention is an electrical connection structure which has a 1st power converter and a 2nd power converter, Comprising: The said 1st power converter is 1st. The second power converter is provided in a second space in the second casing, and the first casing and the second casing are provided in a first space in the casing. The first space and the second space are fastened and partitioned by at least the first casing, and are provided in the first casing that partitions the first space and the second space. The first power converter is a charger that converts power from an external power source and charges a battery, and the second power converter is an inverter connected to a motor. The structure which is is taken.

  INDUSTRIAL APPLICABILITY The present invention can provide an electrical connection structure that can achieve safety and complete waterproofing without cost.

The block diagram which shows an example of the electrical connection structure which concerns on embodiment of this invention 1 is an exploded perspective view showing an example of an electrical connection structure according to an embodiment of the present invention. Side sectional view which shows an example of the electrical connection structure which concerns on embodiment of this invention Side sectional view which shows an example of the junction box which concerns on embodiment of this invention Side sectional view which shows an example of the vehicle mounting position of the electrical connection structure which concerns on embodiment of this invention

(Embodiment)
Hereinafter, an electrical connection structure according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration example of the electrical connection structure according to the present embodiment.

  In FIG. 1, a housing 100 is mounted on a vehicle such as an EV. The casing 100 constitutes one casing by combining the casing 11 (an example of the first casing) and the casing 12 (an example of the second casing), and the casing 11 and the casing by the partition member 10. It is divided into 12. The partition member 10 is, for example, a member constituting the bottom surface of the housing 12 (hereinafter also referred to as “bottom member”).

  An inverter 13 is provided inside the housing 11 (an example of the first space). On the other hand, a charging device 14 and a junction box 15 are provided inside the housing 12 (an example of the second space). The junction box 15 is an apparatus (electric distribution box) that relays electrical connection between devices.

  The charging device 14 is electrically connected to an external power source (commercial power source) 20 and electrically connected to the junction box 15. The charging device 14 and the junction box 15 are connected by a bus bar, for example. Further, the junction box 15 is connected to the battery 30 via, for example, a harness. As a result, the charging device 14 converts the electric power from the external power source 20 from alternating current to direct current, and charges the battery 30 mounted on the vehicle via the junction box 15. The battery 30 is a secondary battery that accumulates electric power for driving the motor 40.

  The inverter 13 is electrically connected to the motor 40 and electrically connected to the junction box 15. The inverter 13 and the junction box 15 are connected by a bus bar 16. The bus bar 16 is made of metal (for example, made of copper) and has a P pole and an N pole. The bus bar 16 passes through the opening 17 provided in the partition member 10 and connects the inverter 13 and the junction box 15. As a result, the inverter 13 converts the current supplied from the battery 30 via the junction box 15 from direct current to alternating current (for example, three-phase alternating current), and supplies it to the motor 40 mounted on the vehicle. The motor 40 drives the wheel of the vehicle with an alternating current.

  FIG. 2 is an exploded perspective view showing a configuration example of the electrical connection structure according to the present embodiment.

  In FIG. 2, the housing 100 can be separated into a housing 11, a housing 12, and a lid 18. The housing 11, the housing 12, and the lid 18 are each made of metal.

  Each of the housing 11 and the housing 12 has a substantially rectangular parallelepiped shape with an upper surface opened. The housing 12 is arranged on the housing 11 and is fastened to the housing 11. At this time, the bottom surface member 10 of the housing 12 functions as a lid portion of the housing 11. On the other hand, the opening of the housing 12 is covered with a lid 18. The fastening of the housing 11 and the housing 12 will be described later with reference to FIG.

  In FIG. 2, an external power supply connection unit 19 provided on the side surface of the housing 12 is an interface connected to the external power supply 20. Further, in the housing 12, a battery connection portion (not shown) that is an interface for connecting to the battery 30 is provided on the side surface opposite to the side surface on which the external power supply connection portion 19 is provided. Further, a motor connection portion (not shown) that is an interface for connecting to the motor 40 is provided on the bottom surface of the housing 11.

  In FIG. 2, the housing 12 has one interlock (not shown). The interlock detects that the lid 18 has been opened (opened state of the lid 18). By this detection, the current in the housing 100 is controlled to stop. As will be described later, a fastening portion for fastening the housing 11 and the housing 12 is provided inside each housing. Therefore, in order to touch the inside of the housing 11, the user must always remove the lid 18 of the housing 12. With such a configuration, the housing 11 does not need to be provided with an interlock for detecting the open state of the lid. That is, it can be said that the interlock of the housing 12 also serves as the interlock of the housing 11.

  FIG. 3 is a side sectional view showing a configuration example of a fastening portion of the electrical connection structure according to the present embodiment.

  A fastening portion for fastening the housing 11 and the housing 12 is provided inside each housing 11, 12. In FIG. 3, the fastening portion is constituted by, for example, a screw hole 22 and a screw 21. The screw hole 22 is formed in each of the housing 11 and the housing 12. When the housing 12 is appropriately overlaid on the housing 11, a single screw hole 22 is formed therethrough. The housing 11 and the housing 12 are fastened by inserting the screw 21 into the screw hole 22. In addition, in FIG. 3, although only one fastening part was illustrated, it is preferable to provide a plurality of the same fastening parts inside each housing.

  FIG. 4 is a side sectional view showing a configuration example in the vicinity of the bus bar of the electrical connection structure according to the present embodiment. In FIG. 4, illustration of the fastening portions (screws 21 and screw holes 22) shown in FIG. 3 is omitted.

  In FIG. 4, a part of the junction box 15 is formed in a convex shape. The convex portion 24 is inserted into the opening 17 and functions as a connection portion (insertion opening) of the bus bar 16. Further, the convex portion 24 is formed with an insulating portion 23 at a portion close to the opening portion 17. As described above, the bus bar 16 passes through the opening 17 and connects the inverter 13 and the junction box 15.

  FIG. 5 is a side sectional view showing an example of a mounting position in the vehicle of the electrical connection structure according to the present embodiment. Here, two examples of FIGS. 5A and 5B will be described. 5A and 5B, the charging device is represented as “CHG”, the junction box as “JB”, the inverter as “INV”, the motor as “M”, and the battery as “BAT”.

  FIG. 5A shows an example in which the housing 100 is mounted in front of the vehicle 1. In FIG. 5A, the battery 30 is disposed at the bottom of the vehicle 1 (for example, under the seat). And the junction box 15 is arrange | positioned in the position in which the distance with the battery 30 can be connected in the shortest in the housing | casing 12. FIG. As described above, the junction box 15 and the battery 30 are connected by a harness.

  FIG. 5B shows an example in which the housing 100 is mounted behind the vehicle 1. In FIG. 5B, the battery 30 is disposed at the bottom of the vehicle 1. And the junction box 15 is arrange | positioned in the position in which the distance with the battery 30 can be connected in the shortest in the housing | casing 12. FIG. As described above, the junction box 15 and the battery 30 are connected by a harness.

  The electrical connection structure of the present embodiment described above can obtain the following effects.

  In the electrical connection structure of the present embodiment, the inverter 13, the charging device 14, and the junction box 15 are accommodated in one housing 100, the charging device 14 and the junction box 15 are electrically connected, and the junction The box 15 and the inverter 13 are electrically connected, and the junction box 15 and the inverter 13 are connected by a bus bar 16. That is, since the electrical connection structure of the present embodiment electrically connects the charging device, the junction box, and the inverter within one housing, the housing itself can cover the electrical connection portion between these devices. In addition, since the electrical connection according to the embodiment of the present invention can be arranged with the positions of the charging device, the junction box, and the inverter fixed in a limited space in the housing, it is not necessary to use a harness. Therefore, the electrical connection structure according to the embodiment of the present invention can realize safety and complete waterproofing without cost.

  In addition, the electrical connection structure of the present embodiment has one housing 100 whose interior is divided into two spaces by the partition member 10, and the inverter 13 and the junction box 15 are provided in separate spaces, respectively. The inverter 13 and the junction box 15 are connected to each other through a bus bar 16 that penetrates an opening 17 provided in the partition member 10. That is, since the electrical connection structure of the present embodiment electrically connects the inverter and the junction box within one housing, the housing itself can cover those electrical connection portions. In addition, since the electrical connection according to the embodiment of the present invention can be arranged with the positions of the charging device, the junction box, and the inverter fixed in a limited space in the housing, it is not necessary to use a harness. Therefore, the electrical connection structure according to the embodiment of the present invention can realize safety and complete waterproofing without cost.

  Further, in the electrical connection structure of the present embodiment, the battery 30 is installed at the rear or bottom of the vehicle 1, and the junction box 15 is disposed at a position in the housing 100 that is connected to the battery at the shortest distance. It is characterized by that. Thereby, the electrical connection structure of this Embodiment can shorten the harness which connects a junction box and a battery, and can reduce cost. In addition, in the arrangement of FIG. 5A and the arrangement of FIG. 5B, the arrangement of FIG. 5B has higher safety. That is, in the case of FIG. 5A, when the user opens the hood, the user can touch the housing 100, which is dangerous. On the other hand, in the case of FIG. 5B, since the user cannot touch the casing 100 arranged inside the trunk even if the rear door is opened, it is safe.

  Further, in the electrical connection structure of the present embodiment, the convex portion 24 which is a part of the junction box 15 has the insulating portion 23 and is inserted into the opening portion 17 and functions as a connecting portion of the bus bar 16. It is characterized by doing. Thereby, the electrical connection structure of this Embodiment can avoid the danger when a bus-bar contacts the metal opening part by loosening of the screw | thread of a fastening part etc., for example.

  Further, in the electrical connection structure of the present embodiment, the housing 100 is divided into the first space and the second space by the partition member 10, and the housing 11 that forms the first space and the housing that forms the second space. The body 12 can be separated from the body 12, and the housing 11 and the housing 12 have a fastening portion that fastens the housing 11 and the housing 12 in the first space and the second space, respectively. That is, the fastening portion is provided inside each housing. As a result, the electrical connection structure of the present embodiment can reduce the length (width) of the fastening portion compared to the case where the fastening portion is provided outside each housing, and the width of the entire housing can be reduced. Can be shortened.

  Further, in the electrical connection structure of the present embodiment, the housing 12 is overlaid on the housing 11 and fastened inside each housing, and the open state of the lid portion 18 of the housing 12 is detected. Only one lock is provided in the casing 12. Thereby, since the electrical connection structure of this Embodiment does not need to provide the interlock in the housing | casing 11, simplification of a shape, reduction of the cost of interlock itself, reduction of parts required for attachment of an interlock, etc. The effect of can be obtained.

  In addition, the junction box 15 of the present embodiment has a convex portion 24 that is inserted into the opening 17 provided in the casing 100 (the casing 12), the convex portion 24 has an insulating portion 23, and It functions as a connection part of the bus bar 16. Thereby, the junction box of this Embodiment can avoid the danger when a bus-bar contacts a metal opening part, for example by loosening of the screw | thread of a fastening part.

  Although the embodiment of the present invention has been described above, the above description is an example, and various modifications can be made.

  For example, in the above embodiment, the junction box 15 is provided in the housing 12 together with the charging device 14, but the present invention is not limited to this. For example, the junction box 15 may be provided in the housing 11 together with the inverter 13.

  For example, in the said embodiment, although the convex part 24 of the junction box 15 had the insulating part 23, it was set as the example which avoids the danger when the bus-bar 16 contacts the opening part 17, but it is not limited to this. . For example, the junction box 15 itself may be formed of an insulator (for example, resin), or the portion of the partition member 10 where the opening 17 is formed may be covered with the insulating member. Thereby, the danger when the bus-bar 16 contacts the opening part 17 by loosening of the screw | thread 21, for example like the insulating part 23 of the convex part 24 can be avoided.

  Further, for example, in the above-described embodiment, the battery 30 is configured to be provided at the bottom of the vehicle 1, but is not limited thereto, and may be disposed in front of or behind the vehicle. Also in that case, the junction box 15 is disposed in the housing 12 at a position where the shortest connection with the battery 30 is possible.

  Further, for example, in the above embodiment, the case where the inverter 13, the charging device 14, and the junction box 15 are accommodated in one casing 100 is exemplified, but the present invention is not limited to this, and other devices are also casings. 100 may be accommodated. For example, a DC / DC converter may also be accommodated in the housing 100. The DC / DC converter is used, for example, when supplying power to an auxiliary battery (12V), and steps down and outputs the high voltage of the battery 30 to 12V. By accommodating the DC / DC converter in the housing 100 (for example, in the housing 12), many high-voltage wirings are covered with the housing 100, and safety can be further ensured.

  In the above embodiment, the casing 100 is configured by combining the casing 11 and the casing 12, and the partition member 10 is, for example, a bottom surface member of the casing 12. However, the present invention is not limited to this, and it may be a single case that does not match a plurality of cases (a single case that cannot be separated into a plurality of cases), and the partition member 10 also simply divides the space. There may be. Note that the number of partition members 10 is not limited to one, and may be a plurality.

  The present invention can be applied to all technologies for electrically connecting devices mounted on a vehicle.

1 Vehicle 10 Partition member (bottom member)
DESCRIPTION OF SYMBOLS 11, 12, 100 Case 13 Inverter 14 Charging device 15 Junction box 16 Bus bar 17 Opening part 18 Cover part 19 External power supply connection part 20 External power supply 21 Screw 22 Screw hole 23 Insulation part 24 Protrusion part 30 Battery 40 Motor

Claims (6)

An electrical connection structure having a first power converter and a second power converter,
The first power converter is provided in a first space in a first housing,
The second power converter is provided in a second space in a second housing,
The first casing and the second casing are fastened,
The first space and the second space are partitioned by at least the first housing,
Have a bus bar penetrating an opening provided in said first casing for partitioning said second space and the first space,
The second space in the second housing is provided with an electrical connection box that relays electrical connection.
Electrical connection structure. The electrical junction box has an insulating part, and the insulating part is inserted into the opening.
The electrical connection structure according to claim 1 . The first power converter is a charger that converts power from an external power source and charges a battery;
The second power converter is an inverter connected to a motor.
The electrical connection structure according to claim 1 or 2. An electrical connection structure having a first power converter and a second power converter,
The first power converter is provided in a first space in a first housing,
The second power converter is provided in a second space in a second housing,
The first casing and the second casing are fastened,
The first space and the second space are partitioned by at least the first housing,
A bus bar penetrating through an opening provided in the first housing partitioning the first space and the second space ;
The portion that forms the opening is covered with an insulating portion.
Electrical connection structure. The first power converter is a charger that converts power from an external power source and charges a battery;
The second power converter is an inverter connected to a motor.
The electrical connection structure according to claim 4 . An electrical connection structure having a first power converter and a second power converter,
The first power converter is provided in a first space in a first housing,
The second power converter is provided in a second space in a second housing,
The first casing and the second casing are fastened,
The first space and the second space are partitioned by at least the first housing,
A bus bar penetrating through an opening provided in the first housing partitioning the first space and the second space ;
The first power converter is a charger that converts power from an external power source and charges a battery;
The second power converter is an inverter connected to a motor.
Electrical connection structure.

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