Non-contact power receiving device

Abstract

To provide a non-contact power receiving device capable of improving power reception efficiency and / or reducing magnetic leakage even when a receiving section is misaligned relative to a transmitting section.SOLUTION: A power receiving device 20 includes: a power receiving section 21, mounted on a vehicle body, capable of receiving power transmitted in a non-contact manner from a power transmission section 11 installed outside the vehicle body; a shielding member 22 provided around the power receiving section 21; and plate members 25, 27 formed from a material different from the shielding member 22 and superimposed on at least one of an inner peripheral portion 22i and an outer peripheral portion 22o of the shielding member 22. The portion of the shielding member 22 on which the plate members 25, 27 are provided is configured to be shape-changeable when power is transmitted from the power transmission unit 11 to the power receiving unit 21.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a contactless power receiving device. [Background technology]

[0002] In recent years, research and development has been conducted into charging mobility vehicles equipped with secondary batteries that contribute to energy efficiency, in order to ensure that more people have access to affordable, reliable, sustainable, and advanced energy.

[0003] Research and development into charging and supplying electricity has been conducted on contactless charging, which charges a battery mounted on a vehicle without contact. For example, Patent Documents 1 to 3 describe systems that transmit power contactlessly from a power transmitting coil provided in a charging station or the like to a power receiving coil provided in the vehicle. These systems are provided with, for example, a conductive shielding member to suppress leakage of a magnetic field around the coil. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-65036 [Patent Document 2] Japanese Patent Publication No. 2020-167753 [Patent Document 3] Japanese Patent Application Publication No. 2018-182877 Summary of the Invention [Problem to be solved by the invention]

[0005] When contactless power transmission is performed with the power receiving unit misaligned relative to the power transmitting unit, magnetic loss occurring in the shielding material provided on the power receiving unit side can reduce power receiving efficiency or cause magnetic fields to leak from the outer periphery of the shielding material, leaving room for improvement.

[0006] The present invention provides a contactless power receiving device that can improve power receiving efficiency and / or reduce magnetic leakage even when the power receiving unit is misaligned with respect to the power transmitting unit. [Means for solving the problem]

[0007] The present invention provides a power receiving unit attached to the vehicle body and capable of receiving power transmitted in a non-contact manner from a power transmitting unit installed outside the vehicle; a shielding member provided around the power receiving portion; a plate member formed of a material different from the shielding member and provided to overlap at least one of an inner circumferential portion and an outer circumferential portion of the shielding member, the plate member includes a first plate member provided on the inner circumferential portion of the shield member and on a surface of the shield member facing the vehicle body, The portion of the shield member where the first plate member is provided is configured so that its shape can bend toward the vehicle body when power is transmitted from the power transmitting unit to the power receiving unit. . The present invention also provides a power receiving unit attached to the vehicle body and capable of receiving power transmitted in a non-contact manner from a power transmitting unit installed outside the vehicle; a shielding member provided around the power receiving portion; a plate member formed of a material different from the shielding member and provided to overlap at least one of an inner circumferential portion and an outer circumferential portion of the shielding member, the plate member includes a second plate member provided on the outer circumferential portion of the shield member and on a surface of the shield member facing the power transmission unit, The portion of the shield member where the second plate member is provided is configured so that its shape can bend back toward the power transmitting unit when power is transmitted from the power transmitting unit to the power receiving unit. [Effects of the Invention]

[0008] According to the present invention, even if the power receiving unit is misaligned with respect to the power transmitting unit, it is possible to improve the power receiving efficiency and / or reduce magnetic leakage. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a schematic configuration of a contactless power transfer system 1. FIG. [Figure 2] 10 is a schematic top view of a state in which the vehicle V is stopped with the center position C2 of the power receiving unit 21 shifted rearward to the right with respect to the center position C1 of the power transmitting unit 11. FIG. [Figure 3] 10 is a schematic top view of a power receiving device 20 including plate members 25 and 27, in which a center position C2 of a power receiving unit 21 is shifted to the right rear side relative to a center position C1 of a power transmitting unit 11. FIG. [Figure 4]FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Figure 5] 10 is a schematic top view of a power receiving device 20 including plate members 25 and 27, in which a center position C2 of a power receiving unit 21 is shifted rearward and leftward relative to a center position C1 of a power transmitting unit 11. FIG. [Figure 6] 10 is a schematic top view of a power receiving device 20 including plate members 25 and 27, in which a center position C2 of a power receiving unit 21 is shifted to the left front side relative to a center position C1 of a power transmitting unit 11. FIG. [Figure 7] 10 is a schematic top view of a power receiving device 20 including plate members 25 and 27, in which a center position C2 of a power receiving unit 21 is shifted to the front right side relative to a center position C1 of a power transmitting unit 11. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, front, rear, left, right, up and down will be described according to the direction as seen from the driver of the vehicle, and in the drawings, the front of the vehicle is indicated as Fr, the rear as Rr, the left as L, the right as R, the top as U, and the bottom as D.

[0011] 1 shows a contactless power transfer system 1 capable of contactlessly transferring power between equipment installed on the ground, such as a parking lot, and a vehicle V. In the following, a case where power is transferred from the equipment to the vehicle V (i.e., contactless charging) will be described as an example of contactless power transfer.

[0012] The contactless power transfer system 1 includes a power transfer device 10 installed on the ground, and a power receiving device 20 provided in a vehicle V and receiving power transferred contactlessly from the power transfer device 10. The contactless power transfer system 1 supplies power from the power transfer device 10 to the power receiving device 20 by using, for example, magnetic coupling between coils such as a magnetic field resonance method or an electromagnetic induction method, or an electric field resonance method.

[0013] The vehicle V is an electric vehicle equipped with a battery BATT, such as a battery-powered electric vehicle or a plug-in hybrid vehicle. The power receiving device 20 receives power transmitted from the power transmitting device 10, and the battery BATT stores the power received by the power receiving device 20. The battery BATT is, for example, a lithium-ion battery or a nickel-metal hydride battery. The vehicle V is configured to be able to travel by driving a motor (not shown) that serves as a drive source using the power stored in the battery BATT.

[0014] The power transmission device 10 includes a power transmission unit 11 that transmits AC power and a power supply unit 12 that is connected to an external power system such as a commercial power supply. The power transmission unit 11 is installed on the ground while being covered with a pad or the like, and has a primary coil 11c that transmits AC power. The shape of the primary coil 11c is, for example, circular in a plan view, but is not limited to this and may be elliptical, square, rectangular, or the like.

[0015] The power receiving device 20 is provided under the floor of the vehicle V, and is attached to the vehicle body from below, for example. The power receiving device 20 includes a power receiving unit 21 that receives AC power (hereinafter also simply referred to as power) transmitted from the power transmitting unit 11 in a contactless manner, and a shielding member 22 provided around the power receiving unit 21.

[0016] The power receiving unit 21 is attached to the vehicle body while being covered with a pad or the like, and has a secondary coil 21c that receives power transmitted from the power transmitting unit 11 in a wireless manner. When the vehicle V is parked in a position where the secondary coil 21c and the primary coil 11c face each other, AC power is supplied from the power supply unit 12 to the primary coil 11c, and power is transmitted contactlessly from the primary coil 11c to the secondary coil 21c. The power received by the secondary coil 21c is rectified by a rectifier (not shown) and supplied to the battery BATT. The shape of the secondary coil 21c is, for example, circular in a plan view, but is not limited thereto and may be elliptical, square, rectangular, or the like.

[0017] The shield member 22 is a panel made of a conductive metal material, such as aluminum. The shield member 22 has a rectangular shape when viewed from above and is disposed horizontally below the vehicle body. The shield member 22 has a fixing portion for fixing to the vehicle body, for example, between an inner peripheral portion 22i and an outer peripheral portion 22o.

[0018] The shield member 22 is provided around the power receiving unit 21. Specifically, the shield member 22 has a through hole at its center when viewed from the top-bottom direction, and the power receiving unit 21 is disposed in the through hole of the shield member 22. The through hole has, for example, a rectangular shape when viewed from the top-bottom direction. During contactless power transmission, eddy currents are generated in the shield member 22, which prevents the magnetic field from leaking outside between the power transmitting device 10 and the power receiving device 20.

[0019] In the contactless power transfer system 1, when the center position of the power transmission unit 11 (primary coil 11c) and the center position of the power receiving unit 21 (secondary coil 21c) are aligned in a top view, the coupling efficiency between the coils is maximized, and the power receiving efficiency of the power receiving unit 21 is maximized. On the other hand, when the center position of the power transmission unit 11 (primary coil 11c) and the center position of the power receiving unit 21 (secondary coil 21c) are misaligned in a top view, the coupling efficiency between the coils decreases, and the power receiving efficiency of the power receiving unit 21 decreases.

[0020] 2 is a schematic top view of vehicle V when it is stopped with the center position C2 of power receiving unit 21 shifted to the rear right with respect to the center position C1 of power transmitting unit 11. The power transmission path from power transmitting unit 11 to power receiving unit 21 is mainly a path in which power transmitting unit 11 and power receiving unit 21 overlap each other in a top view, and which goes in a straight line from power transmitting unit 11 to power receiving unit 21, but there is also another path from power transmitting unit 11 to power receiving unit 21 via shield member 22.

[0021] 2, an area A1 (the shaded area in FIG. 2) including the right side, rear side, and rear left side of inner circumferential portion 22i of shield member 22 contributes to the transmission of power from power transmitting unit 11 to power receiving unit 21. Area A1 is an area relatively far from center position C1 of power transmitting unit 11, and includes an area on the opposite side of center position C2 of power receiving unit 21 from center position C1 of power transmitting unit 11. Note that in the front and front left areas of inner circumferential portion 22i of shield member 22, the magnetic fields generated by power transmitting unit 11 and power receiving unit 21 are in opposite directions and cancel each other out, so they do not contribute to the transmission of power.

[0022] Although the area A1 in the inner circumferential portion 22i of the shielding member 22 contributes to the transmission of power to the power receiving unit 21, magnetic loss occurs in the shielding member 22, and therefore the power transmitted from this transmission path to the power receiving unit 21 is attenuated by the amount of the magnetic loss.

[0023] 3 and 4, the power receiving device 20 further includes a plate member 25 that is provided overlapping the vehicle body side surface (i.e., the upper surface) of the inner circumferential portion 22i of the shield member 22. A plurality of plate members 25 are provided along the inner circumferential portion 22i of the shield member 22. Specifically, eight plate members 25 are provided, two on each of the right side, rear side, left side, and front side of the inner circumferential portion 22i.

[0024] The plate member 25 is made of a metal material different from that of the shield member 22 and having a smaller thermal expansion coefficient than that of the shield member 22. The plate member 25 is made of, for example, steel. In other words, the inner peripheral portion 22i of the shield member 22 is provided with a bimetal structure in which the shield member 22 and the plate member 25, which are made of different metal materials, are stacked on top of each other.

[0025] The portion of shield member 22 where plate member 25 is provided is configured so that its shape can be changed when power is transmitted from power transmitting unit 11 to power receiving unit 21.

[0026] More specifically, during contactless power transmission, magnetic loss occurs in region A1 of shield member 22, which serves as the power transmission path, causing a rise in temperature of shield member 22. Because plate member 25 has a smaller thermal expansion coefficient than shield member 22 and is provided on the vehicle body side, shield member 22 and plate member 25 in region A1 of inner periphery 22i passively deform so as to warp (in other words, bend) toward the vehicle body side due to the rise in temperature.

[0027] Such deformation of shield member 22 and plate member 25 reduces the magnetic field incident on inner circumferential portion 22i of shield member 22, and in the transmission path from power transmitting unit 11 to power receiving unit 21 via shield member 22, power is transmitted from shield member 22 to power receiving unit 21 through the air without passing through inner circumferential portion 22i. In this way, magnetic loss in shield member 22 is reduced, improving the power receiving efficiency of power receiving unit 21. Furthermore, when not transmitting contactless power, for example, when vehicle V is traveling, shield member 22 and plate member 25 are no longer deformed and return to their original state, and are therefore not affected by air resistance.

[0028] As described above, the regions other than region A1 of inner circumferential portion 22i of shield member 22, i.e., the front and front left regions of inner circumferential portion 22i, do not contribute to power transmission to power receiving unit 21, and the temperature rise in these regions is smaller than in region A1. Therefore, shield member 22 and plate member 25 in these regions do not warp toward the vehicle body, or the amount of warping is small. Therefore, leakage of magnetic field in these regions can be suppressed.

[0029] Next, other examples of the positional deviation of the power receiving unit 21 relative to the power transmitting unit 11 will be similarly described with reference to FIGS.

[0030] 5 is a schematic top view of a state in which vehicle V is stopped with center position C2 of power receiving unit 21 shifted to the left rear relative to center position C1 of power transmitting unit 11. In the state shown in FIG. 5, area A2, including the left side, rear side, and right rear side of inner circumferential portion 22i of shield member 22, contributes to the transmission of power from power transmitting unit 11 to power receiving unit 21. During contactless power transmission, magnetic loss occurs in area A2 of shield member 22, which serves as the power transmission path, and the temperature of shield member 22 rises. Then, shield member 22 and plate member 25 in area A2 of inner circumferential portion 22i passively deform so as to warp toward the vehicle body due to the temperature rise.

[0031] 6 is a schematic top view of a state in which vehicle V is stopped with center position C2 of power receiving unit 21 shifted to the left front side relative to center position C1 of power transmitting unit 11. In the state shown in FIG. 6, area A3 of inner circumferential portion 22i of shield member 22, including the left side, front side, and front right side, contributes to the transmission of power from power transmitting unit 11 to power receiving unit 21. During contactless power transmission, magnetic loss occurs in area A3 of shield member 22, which serves as the power transmission path, and the temperature of shield member 22 rises. Then, shield member 22 and plate member 25 in area A3 of inner circumferential portion 22i passively deform so as to warp toward the vehicle body due to the temperature rise.

[0032] 7 is a schematic top view of a state in which vehicle V is stopped with center position C2 of power receiving unit 21 shifted to the left front side relative to center position C1 of power transmitting unit 11. In the state shown in FIG. 7, area A4, including the right side, front side, and left front part of inner circumferential portion 22i of shield member 22, contributes to the transmission of power from power transmitting unit 11 to power receiving unit 21. During contactless power transmission, magnetic loss occurs in area A4 of shield member 22, which serves as the power transmission path, and the temperature of shield member 22 rises. Then, shield member 22 and plate member 25 in area A4 of inner circumferential portion 22i passively deform so as to warp toward the vehicle body due to the temperature rise.

[0033] In this way, according to the power receiving device 20 having the plate member 25 superimposed on the shield member 22, even when contactless power transmission is performed with the power receiving unit 21 misaligned relative to the power transmitting unit 11, the shield member 22 and the plate member 25 in the area contributing to power transmission are passively deformed, so there is no need to deform the shield member 22 using an actuator or the like in response to the misalignment.

[0034] Furthermore, a plurality of slits 22s are formed in the inner peripheral portion 22i of the shield member 22, and plate members 25 are provided between adjacent slits 22s. Providing the slits 22s makes it easy to partially deform portions of the shield member 22 that require deformation. For example, in the example of Fig. 3, slits 22s are provided between two plate members 25 provided on the left side of the inner peripheral portion 22i of the shield member 22, and only the plate member 25 provided in region A1 of these two plate members 25 can be partially deformed.

[0035] Returning to FIG. 2, leakage of the magnetic field to the outside of the shield member 22 during contactless power transmission will be described.

[0036] 2, since the center position C2 of the power receiving unit 21 is shifted to the rear right with respect to the center position C1 of the power transmitting unit 11, there is a risk that the electromagnetic field will leak to the outside of the power receiving device 20 from a front region B1 (the shaded area in FIG. 2) of the outer periphery 22о of the shielding member 22. In other words, if the power receiving unit 21 is shifted with respect to the power transmitting unit 11 during contactless power transmission, there is a risk that the electromagnetic field will leak to the outside of the power receiving device 20 via a position of the outer periphery 22о of the shielding member 22 that is close to the center position C1 of the power transmitting unit 11 (here, the front region B).

[0037] 3 and 4, power receiving device 20 further includes plate members 27 provided on the surface (i.e., the lower surface) of outer circumferential portion 22о of shield member 22 facing power transmission unit 11. In this embodiment, a plurality of plate members 27 are provided along outer circumferential portion 22о of shield member 22. Specifically, four plate members 27 are provided, one each on the right, rear, left, and front sides of outer circumferential portion 22о.

[0038] The plate member 27 is made of a metal material different from that of the shield member 22 and having a smaller thermal expansion coefficient than that of the shield member 22. The plate member 27 is made of, for example, steel. In other words, a bimetal is provided at the outer periphery 22o of the plate member 27, in which the shield member 22 and the plate member 27, which are made of different metal materials, are stacked on top of each other.

[0039] The portion of the shield member 22 where the plate member 27 is provided is configured so that its shape can be changed when power is transmitted from the power transmitting unit 11 to the power receiving unit 21 .

[0040] More specifically, during contactless power transmission, magnetic loss occurs in region B1 of shield member 22, which serves as the power transmission path, causing a rise in temperature of shield member 22. Because plate member 27 has a smaller thermal expansion coefficient than shield member 22 and is provided on the power transmission unit 11 side, shield member 22 and plate member 27 in region B1 of outer periphery 22о passively deform so as to warp toward power transmission unit 11 due to the rise in temperature.

[0041] Such deformation of shield member 22 and plate member 27 increases the magnetic field incident on region B1 of outer periphery 22о of shield member 22, increasing magnetic loss in shield member 22. This makes it possible to suppress magnetic field leakage from region B1 of outer periphery 22о of shield member 22 to the outside of power receiving device 20. Furthermore, when not transmitting contactless power, for example, when vehicle V is traveling, shield member 22 and plate member 27 are no longer deformed and return to their original state, and are therefore not affected by air resistance.

[0042] Next, other examples of the positional deviation of the power receiving unit 21 relative to the power transmitting unit 11 will be similarly described with reference to the above-mentioned FIGS.

[0043] 5, similar to the state shown in Fig. 3, a front region B1 of outer circumferential portion 22о of shield member 22 is closer to center position C1 of power transmission unit 11 than other regions. During contactless power transmission, magnetic loss occurs in region B1 of shield member 22, causing the temperature of shield member 22 to rise. Then, shield member 22 and plate member 27 in region B1 of outer circumferential portion 22о passively deform so as to be warped toward power transmission unit 11 due to the temperature rise.

[0044] 6 and 7, rear region B2 of outer circumferential portion 22о of shield member 22 is closer to center position C1 of power transmission unit 11 than other regions. During contactless power transmission, magnetic loss occurs in region B2 of shield member 22, causing the temperature of shield member 22 to rise. Then, shield member 22 and plate member 27 in region B2 of outer circumferential portion 22о passively deform so as to be warped toward power transmission unit 11 due to the temperature rise.

[0045] In this way, with the power receiving device 20 having the plate member 27 placed on top of the shield member 22, even when contactless power transmission is performed with the power receiving unit 21 misaligned relative to the power transmitting unit 11, the shield member 22 and the plate member 27 passively deform in areas where there is a high probability of magnetic field leakage outside the power receiving device 20, so there is no need to deform the shield member 22 using an actuator or the like in response to the misalignment.

[0046] Furthermore, a configuration may also be adopted in which a plurality of slits 22s are formed in the outer peripheral portion 22o of the shield member 22, similar to the inner peripheral portion 22i, and a plate member 27 is provided between adjacent slits 22s.

[0047] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above embodiment may be combined in any manner without departing from the spirit of the invention.

[0048] For example, in the above-described embodiment, plate members 25 and 27 are provided on both the inner peripheral portion 22i and the outer peripheral portion 22о of the shield member 22, respectively, but this is not limited to this, and the plate members 25 and 27 may be provided on only one of the inner peripheral portion 22i and the outer peripheral portion 22о of the shield member 22.

[0049] In the above-described embodiment, eight plate members 25 are provided on inner peripheral portion 22i of shield member 22, but the number of plate members 25 is not limited to this and can be set arbitrarily. In addition, four plate members 27 are provided on outer peripheral portion 22o of shield member 22, but the number of plate members 27 is not limited to this and can be set arbitrarily.

[0050] This specification describes at least the following: In parentheses, components corresponding to those in the above-described embodiments are shown as examples, but the present invention is not limited to these.

[0051] (1) a power receiving unit (power receiving unit 21) attached to the vehicle body and capable of receiving power transmitted in a non-contact manner from a power transmitting unit (power transmitting unit 11) installed outside the vehicle; a shield member (shield member 22) provided around the power receiving unit; a plate member (plate members 25, 27) formed of a material different from the shielding member and provided to overlap at least one of an inner peripheral portion (inner peripheral portion 22i) and an outer peripheral portion (outer peripheral portion 22o) of the shielding member, a portion of the shield member where the plate member is provided is configured to be variable in shape when power is transmitted from the power transmitting unit to the power receiving unit; Non-contact power receiving device.

[0052] According to (1), even if the power receiving unit is misaligned with the power transmitting unit during contactless power transmission, the power receiving efficiency of the power receiving unit can be improved by deforming the shielding member using thermal expansion due to magnetic loss that occurs in the portion of the inner periphery of the shielding member where the plate member is provided. Also, by deforming the shielding member using thermal expansion due to magnetic loss that occurs in the portion of the outer periphery of the shielding member where the plate member is provided, leakage of the electromagnetic field to the outside of the shielding member can be reduced.

[0053] (2) The contactless power receiving device according to (1), the plate member includes a first plate member (plate member 25) provided on the inner peripheral portion of the shield member and on a surface of the shield member facing the vehicle body, a portion of the shield member where the first plate member is provided is configured so that its shape can be warped toward the vehicle body when power is transmitted from the power transmitting unit to the power receiving unit; Non-contact power receiving device.

[0054] According to (2), even if the power receiving unit is misaligned with the power transmitting unit during contactless power transmission, the portion of the shielding member where the first plate member is provided is warped and deformed toward the vehicle body, thereby reducing magnetic loss at the inner periphery of the shielding member and improving power receiving efficiency.

[0055] (3) A contactless power receiving device according to (1) or (2), the plate member includes a second plate member (plate member 27) provided on the outer circumferential portion of the shield member and on a surface of the shield member facing the power transmission unit, a portion of the shield member where the second plate member is provided is configured so that its shape can bend toward the power transmitting unit when power is transmitted from the power transmitting unit to the power receiving unit; Non-contact power receiving device.

[0056] According to (3), even if the power receiving unit is misaligned with the power transmitting unit during contactless power transmission, the portion of the shielding member where the second plate member is provided will bend and deform toward the power transmitting unit, thereby increasing magnetic loss at the outer periphery of the shielding member and reducing leakage of the electromagnetic field outside the shielding member.

[0057] (4) A contactless power receiving device according to any one of (1) to (3), The shield member is formed of a metal material, the plate member is formed of a metal material having a different thermal expansion coefficient from that of the shield member; Non-contact power receiving device.

[0058] According to (4), by forming a bimetal on the inner periphery and / or the outer periphery of the shielding member, the shielding member can be deformed.

[0059] (5) A contactless power receiving device according to any one of (1) to (4), A plurality of slits (slits 22s) are formed in at least one of the inner peripheral portion and the outer peripheral portion of the shielding member, The plate member is provided between adjacent slits. Non-contact power receiving device.

[0060] According to (5), since the plate member is provided between adjacent slits, it is possible to partially deform the portions of the shield member that require deformation.

[0061] (6) A contactless power receiving device according to any one of (1) to (5), The plate member is provided overlapping the inner peripheral portion and the outer peripheral portion of the shield member. Non-contact power receiving device.

[0062] According to (6), since the plate members are provided on both the inner and outer peripheries of the shield member, it is possible to improve the power receiving efficiency and reduce magnetic leakage. [Explanation of symbols]

[0063] 11 Power Transmission Unit 20 Power receiving device (non-contact power receiving device) 21 Power receiving unit 22 Shielding material 22i inner circumference 22о Outer periphery 22s slit 25 Plate member (first plate member) 27 Plate member (second plate member)

Claims

1. A power receiving unit attached to a vehicle body and capable of receiving power transmitted contactlessly from a power transmitting unit installed outside the vehicle; a shielding member provided around the power receiving portion; a plate member formed of a material different from the shielding member and provided to overlap at least one of an inner circumferential portion and an outer circumferential portion of the shielding member, the plate member includes a first plate member provided on the inner circumferential portion of the shield member and on a surface of the shield member facing the vehicle body, a portion of the shield member where the first plate member is provided is configured to be able to bend toward the vehicle body when power is transmitted from the power transmitting unit to the power receiving unit; Non-contact power receiving device.

2. A power receiving unit attached to a vehicle body and capable of receiving power transmitted contactlessly from a power transmitting unit installed outside the vehicle; a shielding member provided around the power receiving portion; a plate member formed of a material different from the shielding member and provided to overlap at least one of an inner circumferential portion and an outer circumferential portion of the shielding member, the plate member includes a second plate member provided on the outer circumferential portion of the shield member and on a surface of the shield member facing the power transmission unit, a portion of the shield member where the second plate member is provided is configured so that its shape can bend toward the power transmitting unit when power is transmitted from the power transmitting unit to the power receiving unit; Non-contact power receiving device.

3. The contactless power receiving device according to claim 1 or 2, The shield member is formed of a metal material, the plate member is formed of a metal material having a different thermal expansion coefficient from that of the shield member; Non-contact power receiving device.

4. The contactless power receiving device according to claim 1 or 2, a plurality of slits are formed in at least one of the inner peripheral portion and the outer peripheral portion of the shield member, The plate member is provided between adjacent slits. Non-contact power receiving device.

5. The contactless power receiving device according to claim 1 or 2, The plate member is provided to overlap the inner peripheral portion and the outer peripheral portion of the shield member. Non-contact power receiving device.

Images