JP2015027204A - On-board power supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, although a cut-off device which cuts off power supply to a connector when a cover-side interlock member and an enclosure interlock member separate from each other is used in cases where an aperture formed in an enclosure of an on-board power supply apparatus supplying power to a drive motor is closed with a cover, the cover deforms due to a force applied to the cover in cases where a plurality of connectors are covered with a common cover and power supply is cut off owing to separation of the cover-side interlock member from the enclosure-side interlock member, in spite of the cover's being not yet removed.SOLUTION: A cylindrical part 22 extending from the surface of a cover 20 toward the outer side of an enclosure is molded integrally with the cover, and the upper part of a cover-side interlock member 24 is housed inside the cylindrical part. Integrated formation of the cylindrical part 22 on the surface of the cover 20 increases the rigidity of the cover 20, and the possibility of separation of the cover-side interlock member from the enclosure-side interlock member 14 in spite of the cover's not being removed is eliminated.

Description

  The present specification discloses an in-vehicle power supply device that supplies power to a traveling motor.

Patent Document 1 discloses the above-described on-vehicle power supply apparatus. The vehicle-mounted power supply device includes a housing and a cover. An electric device is accommodated in the casing, and an opening is formed in a part of the casing. A connector is disposed at a position facing the opening in the housing. Usually, the cover is fixed to the housing and the opening is closed with the cover. When the cover is removed, the connector is exposed through the opening, and the power feeding device can be inspected.
A high voltage is applied to the electrical equipment that supplies power to the vehicle running motor, and it is necessary to ensure the safety of the inspector during the inspection. Therefore, in the technique of Patent Document 1, a cover-side interlock member and a housing-side interlock member are provided. In a state where the cover is fixed to the casing and the opening is closed with the cover, the cover side interlock member and the casing side interlock member are in contact with each other. When the cover is removed, the cover side interlock member and the housing side interlock member are separated. In the power feeding device, when the cover side interlock member and the housing side interlock member are separated,
A shut-off device for shutting off the power supply to the connector is arranged. The safety of the inspector is ensured by the interlock member and the shut-off device.

JP 2011-166993 A

It is necessary to connect a large number of wires to the in-vehicle power supply device. A technique is adopted in which a plurality of terminals to which wirings are connected are combined into a single connector, but a plurality of connectors are required even using this technique. An advanced on-vehicle power supply apparatus includes a plurality of connectors.
When a plurality of connectors are provided, a single cover straddling the plurality of connectors may be used. Compared with the case of using individual covers for individual connectors, the number of necessary components such as an interlock switch can be reduced by using a common cover that spans a plurality of connectors.
When the opening of the housing is closed with the cover, a force directed from the inside of the housing to the outside of the housing acts on the cover. It is necessary to fix the cover to the housing against the force. The force acting on the cover varies depending on the number of connectors covered by the cover. As the number of connectors increases, the force acting on the cover also increases.

  If you use a common cover that spans multiple connectors, you can reduce the number of required parts. However, a large force acting from the inside of the housing to the outside of the housing acts on the cover, and the cover is deformed by that force. The cover-side interlock member and the housing-side interlock member are separated from each other, but the power supply to the connector is interrupted. When this phenomenon occurs, it becomes impossible to supply power to the traveling motor. In the present specification, a technique for preventing the occurrence of the above phenomenon is disclosed.

The present specification discloses an in-vehicle power supply device that supplies power to a traveling motor. The power supply apparatus includes a housing and a cover. An electrical device is accommodated in the casing, and an opening is formed in a part of the casing. The cover can be fixed to the casing, and when the cover is fixed to the casing, the opening of the casing is closed.
The cover extends across the plurality of connectors, and a cover-side interlock member is formed at a position between the connectors. Inside the housing, when the cover is fixed to the housing and the opening is closed with the cover, the housing-side interlock member that contacts the cover-side interlock member, the cover-side interlock member, and the housing-side interlock A shut-off device that shuts off the power supply to the connector when the member is separated is disposed.
The cover-side interlock member extends from the back surface of the cover (surface on the housing side) toward the inside of the housing, and also extends from the surface of the cover toward the outside of the housing.

  When the cover-side interlock member extends from the front and back surfaces of the cover to both the front surface side and the back surface side, the rigidity of the cover is increased. For this reason, even when a large force directed from the inside of the housing to the outside of the housing acts on the cover, the cover maintains its shape against the force. When the rigidity of the cover is increased, a phenomenon that the cover is deformed and the cover side interlock member and the housing side interlock member are separated does not occur.

The power feeding device that feeds power to the traveling motor in this specification refers to a device that includes at least a part of electric devices that feed power to the traveling motor. For example, when a battery voltage is boosted to supply power to a three-phase motor, a device including a boost converter, a device including an inverter, or a device in which a boost converter and an inverter are integrated is a power supply device. .
In some cases, a device other than a device that supplies power to the traveling motor is incorporated. For example, there may be a case where a step-down converter that operates when a voltage generated by a traveling motor is stepped down to charge a battery during braking is incorporated in the power supply apparatus.

  Details of the technology disclosed in this specification and further improvements will be described in detail in the detailed description and examples.

The figure which looked at the cover (service cover), two connectors covered with the cover, and the cover side interlock member. Sectional drawing in the state which fixed the cover to the housing | casing and closed the opening. The top view of a housing | casing. The exploded perspective view of a cover, two connectors, and a cover side interlock member at the time of a prior art. The figure corresponding to FIG. 1 when it is based on a prior art. The figure corresponding to FIG. 2 when it is based on a prior art.

The main features of the embodiments described below are listed below. The technical elements described below are independent technical elements and exhibit technical usefulness alone or in various combinations, and are limited to the combinations described in the claims at the time of filing. It is not a thing.
(Characteristic 1) The cylinder part extended toward the outer side of a housing | casing from the surface of a cover is shape | molded integrally with the cover. The upper end of the cylinder part is closed. The upper part of the cover side interlock member is accommodated inside the cylinder part. The lower part of the cover side interlock member extends from the back surface of the cover toward the inside of the housing. On the back surface of the cover, an opening continuous with the inside of the cylindrical portion is formed, and a cover-side interlock member is inserted into the opening.
(Feature 2) A PCU (power control unit) of a hybrid vehicle is accommodated in the housing.

  FIG. 3 is a plan view of the housing 10 of the in-vehicle power supply device, and an opening 12 is formed in a part of the housing 10. Various electric devices constituting a PCU (power control unit) of the hybrid vehicle are accommodated in the housing 10. It is necessary to connect a large number of wires to the electrical equipment, and a plurality of connectors are accommodated in the housing 10.

  FIG. 1 is a perspective view of a cover (service cover) 20 that closes the opening 12, and through holes through which bolts for fixing the cover 20 to the housing 10 pass are formed at both ends in the longitudinal direction. Two connectors 30 and 40 are arranged on the back side of the cover. The cover side interlock member 24 is fixed at a position between the two connectors 30 and 40. A cylindrical portion 22 extending from the surface of the cover 20 toward the outside of the housing is molded integrally with the cover 20. The upper end of the cylinder part 22 is closed. The upper part of the cover-side interlock member 24 is accommodated inside the cylindrical portion 22. The lower part of the cover side interlock member extends from the back surface of the cover 20 toward the inside of the housing. On the back surface of the cover 20, an opening continuous with the inside of the cylindrical portion 22 is formed, and a cover side interlock member 24 is inserted into the opening. Since the cylindrical portion 22 extending toward the outside of the housing is integrally formed on the surface of the cover 20, the rigidity of the cover 20 is high.

  FIG. 2 shows a cross-sectional view of a state where the cover 20 is fixed to the housing 10 and the opening 12 is closed. Reference numeral 50 is a terminal block corresponding to the connector 30, reference numeral 60 is a terminal block corresponding to the connector 40, and reference numeral 14 is a housing side interlocking member. Corresponding to the cover side interlock member 24 being provided between the connectors 30 and 40, the housing side interlock member 14 is provided between the terminal blocks 50 and 60. When the cover 20 is fixed to the housing 10 and the opening 12 is closed with the cover 20, the cover-side interlock member 24 is inserted into the housing-side interlock member 14, and both are in contact with each other. The housing-side interlock member 14 is provided with an interlock switch (not shown). The interlock switch is in contact with the cover-side interlock member 24 and the housing-side interlock member 14 or the cover-side interlock member 24 and the housing. It is detected whether the body side interlock member 14 is separated. When the interlock switch detects that the cover-side interlock member 24 and the housing-side interlock member 14 are separated from each other, the power supply to the terminal blocks 50 and 60 is cut off, and the power supply to the collectors 30 and 40 is cut off.

  A force directed from the inside of the housing 10 to the outside acts on the cover 20 fixed to the housing 10. Therefore, the cover 20 is deformed so as to bend outward. In order to keep the number of types of parts small, the same parts are used for the collectors 30 and 40. The interlock members 24 and 14 are provided at an intermediate position in the longitudinal direction of the cover 20. The cover-side interlock member 24 is provided at an intermediate position in the longitudinal direction of the cover 20 and is easily deformed. The cover 20 of this embodiment has high rigidity and a small amount of deformation because the above-described cylindrical portion 22 is integrally molded. Even if the cover 20 is not removed from the housing 10, the cover-side interlock member 24 and the housing-side interlock member 14 are not separated from each other. Power supply is not interrupted while the cover 20 is fixed to the housing 10.

  4 to 6 show the relationship between the conventional cover 120 and the cover-side interlock member 124. The cover side interlock member 124 extends from the back surface of the cover 120 toward the housing side. In this case, the cover-side interlock member 124 and the case-side interlock member 114 may be separated from each other even though the cover 120 has low rigidity and the cover 120 is not removed from the case 10.

  FIG. 6 shows a drawing corresponding to FIG. 2 in the case of the prior art. According to the prior art, the distance from the back surface of the cover 120 to the lower end of the cover-side interlock member 124 is longer than in the case of FIG. For this reason, in the case of FIG. 6, a space 70 is required between the connector 30 and the terminal block 50, and a space 80 is required between the connector 40 and the terminal block 60. Therefore, the height from the terminal blocks 50 and 60 to the cover 120 is H2, whereas in the case of FIG. 2, the distance from the back surface of the cover 20 to the lower end of the cover-side interlock member 24 is as shown in FIG. Shorter than the case. Therefore, in the case of FIG. 2, it is not necessary to secure the spaces 70 and 80 (shown in FIG. 6) in the housing 20, and the height of the housing 10 can be kept low correspondingly. The height from the terminal blocks 50, 60 to the cover 20 can be reduced to H1. H1 <H2. By providing the cylindrical portion 22 on the upper surface of the cover 20 and housing a part of the cover-side interlock member 24 in the cylindrical portion 22, the housing 10 can be reduced in size.

  As mentioned above, although the Example of the technique which this specification discloses was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

10: Housing 12: Opening 14: Housing side interlock member 20: Cover 22: Tube portion 24: Cover side interlock member 30, 40: Connector 50, 60: Terminal block

Claims (1)

It is a vehicle-mounted power supply device that supplies power to the motor for running,
A housing that houses electrical equipment and is partially formed with an aperture;
It has a cover that closes the opening of the housing,
The cover extends across a plurality of connectors, and a cover side interlock member is formed at a position between the connectors.
Inside the housing are a housing-side interlock member that contacts the cover-side interlock member when the cover is fixed to the housing and the opening is closed with the cover, and the cover-side interlock member and the housing-side interlock member. A shut-off device that shuts off the power supply to the connector when separated is arranged,
The on-vehicle power supply device, wherein the cover-side interlock member extends from the back surface of the cover toward the inside of the housing and extends from the surface of the cover toward the outside of the housing.

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