Non-contact power supply device

Abstract

To provide an improved non-contact power supply device which can suppress road surface interference of a vehicle side power reception unit.SOLUTION: A non-contact power supply device 1 comprises: a ground side power supply unit 10; and a vehicle side power reception unit 20 which receives power supplied from the ground side power supply unit 10 in a non-contact manner. The vehicle side power reception unit 20 comprises: a unit body 23 which is provided under the floor of a vehicle 3 and has a power reception coil 21 and a housing 22 that stores the power reception coil 21; and a road surface interference guard 25 which covers a front wall 22a and a rear wall 22b of the unit body 23 in a state of having a gap G in the vehicle longitudinal direction (L direction) and has a triangular shape lightened part 25a with the vehicle lower side as an apex when viewed from the vehicle longitudinal direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a non-contact power supply device.

Background Art

[0002] Patent Document 1 discloses a non-contact power supply device including a ground-side power supply unit and a vehicle-side power receiving unit that receives power supplied from the ground-side power supply unit in a non-contact manner.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above-described conventional non-contact power supply device, for example, there is room for further improvement in suppressing road surface interference of the vehicle-side power receiving unit.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an improved non-contact power supply device capable of suppressing road surface interference of a vehicle-side power receiving unit.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, a contactless power supply device according to the present invention includes a ground-side power supply unit and a vehicle-side power receiving unit that receives power supplied from the ground-side power supply unit in a contactless manner. The vehicle-side power receiving unit is provided under the floor of the vehicle and includes a unit main body having a power receiving coil and a housing that houses the power receiving coil, and a road surface interference guard that covers the front wall or the rear wall of the unit main body with a gap in the vehicle longitudinal direction and is provided with a triangular cutout portion having the lower part of the vehicle as a vertex when viewed from the vehicle longitudinal direction.

Effect of the Invention

[0007] According to the present invention, for example, when an impact due to road surface interference is input to the vehicle-side power receiving unit, the impact is input to the unit main body via the road surface interference guard, so that the influence (such as wear and deformation) on the unit main body due to road surface interference can be suppressed. Further, since the road surface interference guard is provided with an inverted triangular cutout portion, for example, it is possible to suppress the weight of the road surface interference guard while suppressing the snagging due to the intrusion of the curb corner portion into the cutout portion. As a result, it is possible to provide an improved contactless power supply device that can suppress the road surface interference of the vehicle-side power receiving unit.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0009] Exemplary embodiments of the present invention are disclosed below. The configurations of the embodiments shown below, as well as the operations and effects brought about by such configurations, are examples. The present invention can also be realized by configurations other than those disclosed in the following embodiments. Note that in this specification, ordinal numbers are used only for distinguishing components, members, parts, positions, directions, etc., and do not indicate order or priority.

[0010] [Embodiment] FIG. 1 is a schematic side view of a non-contact power supply device 1 according to an embodiment. In the following description, for convenience, three mutually orthogonal directions are defined. The L direction is along the vehicle longitudinal direction, the W direction is along the vehicle width direction, and the H direction is along the vehicle vertical direction.

[0011] As shown in FIG. 1, the non-contact power supply device 1 includes a ground-side power supply unit 10 and a vehicle-side power receiving unit 20. The non-contact power supply device 1 supplies power non-contact from a ground-side power supply unit 10 installed on the ground 2 such as a power supply stand to a vehicle-side power receiving unit 20 mounted on a vehicle 3 such as an electric vehicle, and charges the battery of the vehicle 3.

[0012] The ground-side power supply unit 10 has a power transmission coil 11 that transmits electromagnetic waves for power transmission, etc., and the vehicle-side power receiving unit 20 has a power reception coil 21 that receives electromagnetic waves for power transmission, etc. The vehicle-side power receiving unit 20 is provided under the floor of the vehicle 3, and in a parked state facing the ground-side power supply unit 10, power is supplied non-contact from the power transmission coil 11 to the power reception coil 21 by the electromagnetic induction action between the power transmission coil 11 and the power reception coil 21.

[0013] Here, the vehicle-side power receiving unit 20 has a unit main body 23 and a road surface interference guard 25. In the present embodiment, for example, a pair of road surface interference guards 25 are provided at intervals in the vehicle longitudinal direction (L direction), and the front wall 22a and the rear wall 22b of the unit main body 23 are covered by this pair of road surface interference guards 25.

[0014] Note that the road surface interference guard 25 is not limited to this example. For example, it may be configured in a rectangular frame shape that covers the front wall 22a, the rear wall 22b, and the side walls on both sides in the vehicle width direction (W direction) of the unit main body 23. The road surface interference guard 25 has a function of protecting the periphery of the unit main body 23.

[0015] Further, the road surface interference guard 25 has an inclined surface 25b. The inclined surface 25b is provided on the side surface of the road surface interference guard 25 facing the front or rear of the vehicle, and is inclined downward toward the vehicle as it goes toward the center side in the vehicle longitudinal direction (L direction). The inclined surface 25b has a function of sliding or guiding flying stones, interference objects such as curbs, speed breakers, and humps toward the ground 2 side. The inclined surface 25b is also referred to as a slide table portion or the like.

[0016] The unit main body 23 has, for example, the power receiving coil 21 described above and a housing 22 that houses the power receiving coil 21. The housing 22 is configured in a horizontally long rectangular parallelepiped box shape in the vehicle longitudinal direction (L direction). The housing 22 has a plurality of wall portions such as a front wall 22a, a rear wall 22b, a lower wall 22c, an upper wall 22d, and a pair of side walls.

[0017] Both the front wall 22a and the rear wall 22b extend along a direction orthogonal to the vehicle longitudinal direction (L direction), and are provided in parallel with each other at an interval in the vehicle longitudinal direction. The front wall 22a constitutes the front end portion of the unit main body 23, and the rear wall 22b constitutes the rear end portion of the unit main body 23.

[0018] Both the lower wall 22c and the upper wall 22d extend along a direction orthogonal to the vehicle vertical direction (H direction), and are provided in parallel with each other at an interval in the vehicle vertical direction. The lower wall 22c constitutes the lower end portion of the unit main body 23, and the upper wall 22d constitutes the upper end portion of the unit main body 23.

[0019] Each of the pair of side walls extends along a direction orthogonal to the vehicle width direction (W direction), and is provided in parallel to each other with a space therebetween in the vehicle width direction. One of the side walls constitutes the left end portion of the unit body 23, and the other constitutes the right end portion of the unit body 23.

[0020] Further, the housing 22 is constituted by a combination of a plurality of members (parts) such as, for example, the case 22A shown in FIG. 3 and the cover 22B. The case 22A includes, for example, a front wall 22a, a rear wall 22b, an upper wall 22d, a pair of side walls, etc., and is made of an electromagnetic wave shielding material such as metal. The cover 22B includes, for example, a lower wall 22c, etc., and is made of an electromagnetic wave permeable material such as synthetic resin.

[0021] FIG. 2 is a schematic front view of the road surface interference guard 25. As shown in FIG. 2, the road surface interference guard 25 is provided with a plurality of cutout portions 25a spaced apart from each other in the vehicle width direction (W direction). The cutout portion 25a is a groove portion that is recessed from the inclined surface 25b toward the center side in the vehicle longitudinal direction (L direction) and is open toward the front or rear of the vehicle.

[0022] In the present embodiment, the cutout portion 25a is formed in a triangular shape with the lower part of the vehicle as the apex when viewed from the vehicle longitudinal direction, that is, along the line of sight in FIG. 2. That is, the opening width of the cutout portion 25a in the vehicle width direction (W direction) gradually narrows from the upper end portion to the lower end portion of the cutout portion 25a. Thereby, the area of the region on the lower side of the vehicle in the inclined surface 25b, that is, the area between two adjacent cutout portions 25a in the vehicle width direction is ensured.

[0023] If the cutout portion 25a is formed in a rectangular shape when viewed from the vehicle longitudinal direction, there is a risk that the area of the region on the lower side of the vehicle in the inclined surface 25b will become narrow. Therefore, when the curb corner portion or the like interferes with the road surface interference guard 25, the curb corner portion may enter into the rectangular cutout portion 25a, and as a result, the curb corner portion may be caught by the cutout portion 25a.

[0024] In this regard, according to the present embodiment, since the cutout portion 25a is formed in a triangular shape with the lower part of the vehicle as the apex when viewed in the vehicle front-rear direction, even if the curb corner or the like interferes with the road surface interference guard 25, intrusion of the curb corner into the cutout portion 25a can be suppressed, and thus the curb corner can be slid along the inclined surface 25b.

[0025] Further, in the present embodiment, the cutout portion 25a is provided only in the region in the vehicle front-rear direction (L direction) (see FIG. 1) where the inclined surface 25b is provided in the road surface interference guard 25, and is open downward of the vehicle. That is, the bottom of the cutout portion 25a is aligned with the lower end of the inclined surface 25b in the vehicle up-down direction (H direction). Thereby, accumulation of flying stones, water, etc. in the cutout portion 25a is suppressed.

[0026] FIG. 3 is an enlarged cross-sectional view of the road surface interference guard 25 in FIG. 1. As shown in FIG. 3, the road surface interference guard 25 is fixed to the attachment portion 3a of the vehicle 3 together with the unit body 23 by a coupling tool 26 such as a screw or a bolt.

[0027] Specifically, the unit body 23 is provided with a protruding wall 22e that protrudes from the housing 22 toward the front or rear of the vehicle. The road surface interference guard 25 is overlapped with the protruding wall 22e and the attachment portion 3a of the vehicle 3 in the vehicle up-down direction (H direction), and is fastened in the vehicle up-down direction by the coupling tool 26.

[0028] In a state where the road surface interference guard 25 is attached to the vehicle 3, a gap G in the vehicle front-rear direction is provided between the road surface interference guard 25 and the unit body 23. In the present embodiment, transmission of the load input to the road surface interference guard 25 directly to the unit body 23 is suppressed by such a gap G in the vehicle front-rear direction.

[0029] Further, the road surface interference guard 25 is made of an electromagnetic wave shielding material such as a non-magnetic metal, for example. Also, in the present embodiment, the cutout portion 25a is configured as a groove portion recessed in the vehicle longitudinal direction (L direction) without penetrating the road surface interference guard 25 in the vehicle longitudinal direction. In the present embodiment, with such a material and the configuration of the cutout portion 25a, the weight of the road surface interference guard 25 is reduced while ensuring shielding performance.

[0030] As described above, in the present embodiment, the non-contact power feeding device 1 includes a ground-side power feeding unit 10 and a vehicle-side power receiving unit 20 that receives power supplied from the ground-side power feeding unit 10 in a non-contact manner. The vehicle-side power receiving unit 20 is provided under the floor of the vehicle 3 and has a unit main body 23 having a power receiving coil 21 and a housing 22 that houses the power receiving coil 21, and a road surface interference guard 25 that covers the front wall 22a or the rear wall 22b of the unit main body 23 with a gap G in the vehicle longitudinal direction (L direction) and is provided with a triangular cutout portion 25a having the bottom of the vehicle as its apex when viewed from the vehicle longitudinal direction.

[0031] According to such a configuration, for example, when an impact in the vehicle longitudinal direction (L direction) due to road surface interference is input to the vehicle-side power receiving unit 20, the impact is input to the unit main body 23 via the road surface interference guard 25, so that the influence (such as wear and deformation) on the unit main body 23 due to road surface interference can be suppressed. Further, since the road surface interference guard 25 is provided with an inverted triangular cutout portion 25a, for example, the weight of the road surface interference guard 25 can be reduced while suppressing catching or the like due to the intrusion of the curb corner into the cutout portion 25a. As a result, it is possible to provide a non-contact power feeding device 1 with improved suppression of road surface interference for the vehicle-side power receiving unit 20.

[0032] Although the embodiments of the present invention have been illustrated above, the above embodiments are merely examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the gist of the invention. Also, each configuration, shape, etc. of the specifications (structure, type, direction, form, size, length, width, thickness, height, number, arrangement, position, material, etc.) can be appropriately changed and implemented.

Explanation of Reference Numerals

[0033] 1…Non-contact power supply device 3…Vehicle 10…Ground-side power supply unit 20…Vehicle-side power receiving unit 21…Power receiving coil 22…Housing 22a…Front wall 22b…Rear wall 23…Unit body 25…Road surface interference guard 25a…Cut-out portion G…Gap H…Vehicle vertical direction L…Vehicle longitudinal direction W…Vehicle width direction

Claims

【Claim 1】 A wireless power feeding device comprising a ground-side power feeding unit and a vehicle-side power receiving unit that wirelessly receives power supplied from the ground-side power feeding unit, wherein the vehicle-side power receiving unit is provided under the floor of the vehicle and has a unit body having a power receiving coil and a housing that houses the power receiving coil, a road surface interference guard that covers the front wall or the rear wall of the unit body with a gap in the vehicle longitudinal direction and has a triangular cutout portion with the bottom of the vehicle as the apex when viewed from the vehicle longitudinal direction, and is a wireless power feeding device.

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