CN102897040B - Electric vehicle - Google Patents

Abstract

The invention provides an electric vehicle. An electric vehicle (1) can travel using electric power supplied from a power supply facility outside the vehicle. The power receiving resonator (20) is arranged under the metal underbody (10), and is configured to receive power from the power transmitting resonator (60) by resonating with the power transmitting resonator (60) of the power source via an electromagnetic field. The power storage device (40) is arranged on the upper portion of the underbody, and stores electric power received by the power receiving resonator. The cable is arranged at the lower portion of the underbody together with the power receiving resonator, and is configured to transmit electric power received by the power receiving resonator to the power storage device. The cables are routed from the power receiving resonator to below the power storage device in the front-rear direction of the electric vehicle at the lower portion of the lower vehicle body.

Description

electric vehicle

This application is a divisional application of a Chinese patent application with an application date of March 12, 2009, an application number of 200980157917.X, and an invention title of "electric vehicle".

technical field

The present invention relates to an electric vehicle, and more particularly to an electric vehicle capable of receiving electric power in a non-contact manner from a power source outside the vehicle by a resonance method.

Background technique

Electric vehicles such as electric cars and hybrid cars are attracting attention as vehicles that consider the environment. An electric vehicle charges a vehicle-mounted battery from a power source external to the vehicle, and uses the charged electric power to drive a motor to travel. A hybrid vehicle is a vehicle equipped with an engine as a power source in addition to a motor, or a vehicle equipped with a fuel cell as a DC power source for driving the vehicle.

Among hybrid vehicles, there is also known a vehicle in which a vehicle-mounted battery can be charged from a power source external to the vehicle, similarly to an electric vehicle. For example, a so-called "plug-in hybrid vehicle" is known in which an on-vehicle battery can be charged from a general household power source by connecting a power outlet provided in a house to a charging port provided in a vehicle with a charging cable.

On the other hand, as a power transmission method, wireless power transmission that does not use power lines or transmission cables has attracted attention in recent years. As the wireless power transmission technique, three techniques of power transmission using electromagnetic induction, power transmission using microwaves, and power transmission using a resonance method are known as the most promising techniques.

Among them, the resonance method is a non-contact power transmission technology that makes a pair of resonators (such as a pair of self-resonant coils) resonate in an electromagnetic field (proximity field), and transmits power through the electromagnetic field. A large electric power of several kW is transmitted (refer to Non-Patent Document 1).

Non-Patent Document 1: Andre Kurs et al., "Wireless Power Transfer via Strongly Coupled Magnetic Resonances", [online], July 6, 2007, Science, Vol. 317, p.83-86, [September 12, 2007 Daily Retrieval], Internet <URL: http://www.sciencemag.org/cgi/317/5834/83.pdf>

Contents of the invention

The problem to be solved by the invention

In the case where the above-mentioned non-contact power transmission (power transmission) technology based on the resonance method is used to supply power to an electric vehicle from a power source outside the vehicle, high-frequency power at the level of, for example, several hundred kHz is received in the vehicle, so The generated electromagnetic waves can have adverse effects on various electrical equipment in the car.

Therefore, an object of the present invention is to provide an electric vehicle capable of suppressing adverse effects of electromagnetic waves generated upon receiving electric power from a power source outside the vehicle on electrical equipment in the vehicle.

means of solving problems

According to the present invention, an electric vehicle can run using electric power supplied from a power source outside the vehicle, and the electric vehicle includes a resonator for power reception, a power storage device, and a cable. The power receiving resonator is disposed under the metallic underbody, and is configured to receive power from the power transmitting resonator by resonating with the power transmitting resonator of a power source outside the vehicle via an electromagnetic field. The power storage device stores electric power received by the power receiving resonator. The cable is arranged at the lower portion of the underbody together with the power receiving resonator, and is configured to transmit electric power received by the power receiving resonator to the power storage device.

Preferably, the power storage device is disposed on an upper portion of the underbody and covered with a member capable of shielding electromagnetic waves.

More preferably, the member is made of metal.

In addition, it is preferable that the power storage device is arranged at a lower portion of the lower vehicle body.

Preferably, the electric vehicle further includes a rectifier. The rectifier is configured to rectify the AC power received by the power receiving resonator. In addition, the rectifier is disposed at the lower portion of the lower vehicle body.

The effect of the invention

In this electric vehicle, the power receiving resonator receives electric power from the power transmitting resonator by resonating with the power transmitting resonator of the power supply outside the vehicle via an electromagnetic field. Since the power receiving resonator is arranged under the metal lower vehicle body, electromagnetic waves generated around the power receiving resonator when receiving high-frequency power are shielded by the lower body, and the influence of electromagnetic waves on the vehicle interior can be suppressed. In addition, when an electromagnetic wave generated by receiving electric power propagates through a cable for transmitting the electric power received by the power receiving resonator to the power storage device, in this electric vehicle, the cable is also arranged on the metal lower body. The lower part of the body, so electromagnetic waves generated from the cables are also shielded by the lower body.

Therefore, according to this electric vehicle, it is possible to suppress adverse effects on electrical equipment in the vehicle due to electromagnetic waves generated when electric power is received from a power supply outside the vehicle.

Description of drawings

FIG. 1 is a view of an electric vehicle according to Embodiment 1 of the present invention, as viewed from the side of the vehicle, showing the arrangement of main parts of the invention.

FIG. 2 is an enlarged view around an underbody of the electric vehicle shown in FIG. 1 .

Fig. 3 is a graph showing the electromagnetic field shielding effect of iron.

FIG. 4 is a diagram for explaining the principle of power transmission by the resonance method.

5 is a graph showing the relationship between the distance from a current source (magnetic current source) and the strength of an electromagnetic field.

FIG. 6 is a block diagram showing a configuration of a power train of the electric vehicle shown in FIG. 1 .

FIG. 7 is a diagram showing the arrangement of main parts of the invention as viewed from the vehicle side of the electric vehicle according to Modification 1 of Embodiment 1. FIG.

FIG. 8 is a diagram showing the arrangement of main parts of the invention as viewed from the vehicle side in an electric vehicle according to Modification 2 of Embodiment 1. FIG.

FIG. 9 is a diagram showing the arrangement of main parts of the invention viewed from the side of the vehicle with respect to the electric vehicle according to Embodiment 2. FIG.

Fig. 10 is an enlarged view around the underbody of the electric vehicle shown in Fig. 9 .

Explanation of reference signs:

1, 1A～1C electric vehicle; 10 lower body; 20 resonator for power receiving; 22,340 secondary self-resonant coil; 24,350 secondary coil; 30 cable; 35 rectifier; 40 power storage device; 42 electromagnetic shielding material ; 44 rear seat; 46 center console; 50 ground; 60 resonator for power transmission; 70 high-frequency power driver; 80 AC power supply; 110 PCU; 112 boost converter; 124 engine; 126 power distribution device; 128 drive wheel; 130 ECU; 310 high-frequency power supply; 320 primary coil; 330 primary self-resonant coil; 360 load; SMR1, SMR2 system main relay; PL1, PL2 positive line; NL1, NL2 negative line.

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, the same or corresponding parts are given the same symbols and their descriptions are not repeated.

[Embodiment 1]

FIG. 1 is a view of an electric vehicle according to Embodiment 1 of the present invention, as viewed from the side of the vehicle, showing the arrangement of main parts of the invention. Referring to FIG. 1 , an electric vehicle 1 includes an underbody 10 , a power receiving resonator 20 , a cable 30 , and a power storage device 40 . The electric vehicle 1 is configured to be capable of traveling by a not-illustrated traveling motor by receiving electric power supplied from a power supply device provided outside the vehicle, which will be described later.

The underbody 10 is the underside of the vehicle body and is made of metal members. The underbody 10 is usually made of iron, but the present invention is not limited to the structure in which the underbody 10 is made of iron (hereinafter, the structure in which the underbody 10 is made of iron).

The power receiving resonator 20 is fixedly installed on the lower part of the lower vehicle body 10 (that is, outside the vehicle). The power receiving resonator 20 is configured to be able to receive electric power from the power transmitting resonator 60 in a non-contact manner by resonating with the power transmitting resonator 60 of the power feeding facility via an electromagnetic field. As an example, the power receiving resonator 20 is composed of a self-resonant coil (LC resonant coil) configured to resonate with the power transmitting resonator 60 via an electromagnetic field at a high frequency of hundreds of kHz, made of TiO ₂ or BaTi ₄ O ₉ , LiTaO ₃ It is composed of high dielectric discs formed of high dielectric constant materials.

The cable 30 is provided at the lower portion of the lower vehicle body 10 together with the power receiving resonator 20 . Cable 30 transmits the electric power received by power receiving resonator 20 to power storage device 40 .

In Embodiment 1, power storage device 40 is arranged on the upper portion of underbody 10 (that is, inside the vehicle), specifically, in the luggage room. The power storage device 40 is a rechargeable DC power supply including, for example, a lithium-ion and/or nickel-metal hydride secondary battery. The power storage device 40 temporarily stores electric power received by the power receiving resonator 20 and electric power generated by a running motor or generator not shown, and supplies the stored electric power to the running motor during running. A large-capacity capacitor can also be used as the power storage device 40 .

The power supply equipment capable of supplying electric power to the electric vehicle 1 includes a resonator 60 for power transmission, a high-frequency power supply driver 70 , and an AC power supply 80 . The power transmission resonator 60 is installed on the ground 50 and receives power supply from the high-frequency power driver 70 . Furthermore, the power transmission resonator 60 is configured to be capable of transmitting high-frequency power received from the high-frequency power source driver 70 to the power reception resonator 20 in a non-contact manner by resonating with the power reception resonator 20 of the electric vehicle 1 via an electromagnetic field. way of delivery. The resonator 60 for power transmission is also the same as the resonator 20 for power reception. Consists of high dielectric disks and the like made of high dielectric constant materials.

The high-frequency power supply driver 70 converts the electric power received from the AC power supply 80 into high-frequency power and supplies it to the resonator 60 for power transmission. The frequency of the high-frequency power generated by the high-frequency power driver 70 is, for example, about several hundred kHz.

FIG. 2 is an enlarged view around an underbody of electric vehicle 1 shown in FIG. 1 . Referring to FIG. 2 , the power receiving resonator 20 is disposed on the lower portion of the iron lower vehicle body 10 (that is, outside the vehicle). The reason for disposing the power receiving resonator 20 at the lower portion of the lower vehicle body 10 is that when a high-frequency electromagnetic wave is generated around the power receiving resonator 20 as electric power is received from the power transmitting resonator 60 of the power feeding device, the electromagnetic wave is absorbed by the iron. The lower vehicle body 10 shielding of making can restrain the influence of electromagnetic wave on the inside of the car.

In addition, in this electric vehicle 1 , the cable 30 is also disposed in the lower portion of the lower vehicle body 10 (that is, outside the vehicle). The reason why the cable 30 is arranged at the lower part of the lower vehicle body 10 is that the cable 30 is connected to the power receiving resonator 20, so when the cable 30 becomes a source of electromagnetic waves due to propagation of high-frequency electromagnetic waves accompanying power reception in the cables 30, the electromagnetic waves Shielded by the lower body 10 made of iron, the influence of electromagnetic waves on the interior of the vehicle can be suppressed.

Furthermore, the high-frequency power received by the power receiving resonator 20 and flowing through the cable 30 is rectified by a rectifier 35 (not shown in FIG. 40 stores the received power. The rectifier 35 is also disposed on the lower part of the lower vehicle body 10 (that is, outside the vehicle). This is because the rectifier 35 that receives the high-frequency power received by the power receiving resonator 20 via the cable 30 also serves as a source of electromagnetic waves.

Since the power storage device 40 is electrically connected to the cable 30 and the power receiving resonator 20 through the rectifier 35 , it is preferable to cover the power storage device 40 with a member 42 capable of shielding electromagnetic waves. As the member 42, for example, a metal member such as iron having a high electromagnetic shielding effect, cloth having an electromagnetic wave shielding effect, or the like can be used. In addition, when the rectifier 35 is covered with a member capable of shielding electromagnetic waves, the rectifier 35 may be arranged together with the power storage device 40 on the upper portion of the lower body 10 (that is, inside the vehicle).

In this way, in this electric vehicle 1, not only the power receiving resonator 20 that receives high-frequency power using the resonance method, but also the cable 30 for transmitting the power received by the power receiving resonator 20 to the power storage device 40 is installed. The following (i.e. outside the car) of the lower vehicle body 10 made of iron. Thereby, it is possible to suppress the high-frequency electromagnetic waves accompanying receiving electric power from the power supply equipment from reaching the interior of the vehicle.

Further, in Embodiment 1, when the power storage device 40 is arranged on the upper surface of the underbody 10 (that is, inside the vehicle), by covering the power storage device 40 with the member 42 capable of shielding electromagnetic waves, the impact of electromagnetic waves on the vehicle interior can be more fully suppressed. Impact.

Fig. 3 is a graph showing the electromagnetic field shielding effect of iron. Referring to FIG. 3 , broken line k1 represents the electromagnetic field shielding effect of iron, and for comparison, the broken line k2 represents the electromagnetic field shielding effect of aluminum. In the graph, the horizontal axis is the frequency of the electromagnetic field, and the vertical axis is the shielding characteristic. As described above, in this electric vehicle 1, by resonating the resonator 60 for power transmission and the resonator 20 for power reception at a high frequency of several hundreds of kHz, the resonator 60 for power transmission and the resonator 20 for power reception are resonated through the electromagnetic field. 20 to deliver electricity. Furthermore, as shown in FIG. 3 , iron has better shielding properties than aluminum at frequencies lower than 500 kHz, and iron has a high electromagnetic wave shielding effect in power transmission using a resonance method that is also assumed to use frequencies lower than 500 kHz.

FIG. 4 is a diagram for explaining the principle of power transmission (power transmission) by the resonance method. In FIG. 4 , a case where an LC resonance coil is used as a resonator is shown as an example. Referring to Fig. 4, in the resonance method, as in the resonance of two tuning forks, two LC resonance coils having the same natural frequency resonate in an electromagnetic field (proximity field), thereby transmitting power from one resonance coil to the other via the electromagnetic field .

Specifically, the primary coil 320 is connected to the high-frequency power supply 310 , and high-frequency power of several hundred kHz is supplied to the primary self-resonant coil 330 magnetically coupled to the primary coil 320 by electromagnetic induction. The primary self-resonant coil 330 is an LC resonator formed by the coil's own inductance and stray capacitance (parasitic capacitance). resonance. Then, energy (electric power) moves from the primary self-resonant coil 330 to the secondary self-resonant coil 340 via the electromagnetic field. The energy (electric power) transferred to secondary self-resonant coil 340 is taken out by secondary coil 350 magnetically coupled to secondary self-resonant coil 340 by electromagnetic induction, and supplied to load 360 . Power transmission by the resonance method is realized when the Q value representing the resonance strength of the primary self-resonant coil 330 and the secondary self-resonant coil 340 is greater than, for example, 100.

The primary coil 320 is provided for easily supplying power to the primary self-resonant coil 330, and the secondary coil 350 is provided for easily extracting power from the secondary self-resonant coil 340. Power is directly supplied to primary self-resonant coil 330 , and electric power is directly taken out from secondary self-resonant coil 340 without providing secondary coil 350 .

FIG. 5 is a graph showing the relationship between the distance from a current source (magnetic current source) and the strength of an electromagnetic field. Referring to Figure 5, the electromagnetic field contains three components. Curve k11 is a component that is inversely proportional to the distance from the wave source and is called "radiated electromagnetic field". The curve k12 is a component inversely proportional to the square of the distance from the wave source, and is called "induced electromagnetic field". In addition, the curve k13 is a component inversely proportional to the cube of the distance from the wave source, and is called "electrostatic magnetic field".

There is also a region where the intensity of electromagnetic waves decreases sharply with distance from the wave source, but in the resonance method, energy (electric power) is transmitted using this near field (evanescent field). That is, by using the near field to resonate a pair of LC resonance coils having the same natural frequency, energy (power) is transferred from one LC resonance coil (primary self-resonance coil) to the other LC resonance coil (secondary self-resonance coil). ). Since this near field does not transmit energy (electricity) to a distant place, the resonance method can transmit power with less energy loss than electromagnetic waves that transmit energy (electricity) through a "radiated electromagnetic field" that propagates energy to a distant place.

FIG. 6 is a block diagram showing a configuration of a power train of the electric vehicle shown in FIG. 1 . FIG. 6 also shows a case where an LC resonant coil is used as a resonator for power reception as an example. Referring to FIG. 6 , electric vehicle 1 includes power storage device 40 , system main relay SMR1 , PCU (Power Control Unit: power control unit) 110 , motor generators 120 , 122 , engine 124 , power distribution device 126 and drive wheels 128 . In addition, the electric vehicle 1 further includes a power receiving resonator 20 , a cable 30 , a rectifier 35 , a system main relay SMR2 , and an ECU (Electronic Control Unit: Electronic Control Unit) 130 .

This electric vehicle 1 is equipped with an engine 124 and a motor generator 122 as power sources. Engine 124 and motor generators 120 and 122 are connected to power split device 126 . Furthermore, electric vehicle 1 travels using the driving force generated by at least one of engine 124 and motor generator 122 . The power generated by the engine 124 is divided into two paths by the power split device 126 . That is, one is a path for transmission to drive wheels 128 , and the other is a path for transmission to motor generator 120 .

The motor generator 120 is an AC rotating electrical machine, and is composed of, for example, a three-phase AC synchronous motor in which permanent magnets are embedded in a rotor. Motor generator 120 generates electricity using kinetic energy of engine 124 via power split device 126 . For example, when the state of charge (also referred to as SOC (state of Charge)) of power storage device 40 is lower than a predetermined value, engine 124 is started to generate power by motor generator 120 to charge power storage device 40 .

The motor generator 122 is also an AC rotating electrical machine, and like the motor generator 120 , is constituted by, for example, a three-phase AC synchronous motor in which permanent magnets are embedded in a rotor. Motor generator 122 generates driving force using at least one of electric power stored in power storage device 40 and electric power generated by motor generator 120 . Further, the driving force of the motor generator 122 is transmitted to the drive wheels 128 .

In addition, when the vehicle is braked or the acceleration on a downward slope is reduced, the kinetic energy accumulated in the vehicle as kinetic energy and potential energy is used for rotational driving of the motor generator 122 via the drive wheel 128, and the motor generator 122 acts as a generator for power generation. machine to work. In this way, motor generator 122 converts running energy into electric power and operates as a regenerative brake that generates braking force. Furthermore, electric power generated by motor generator 122 is stored in power storage device 40 .

The power split device 126 is composed of planetary gears including a sun gear, a pinion gear, a carrier, and a ring gear. The pinion meshes with the sun gear and the ring gear. The carrier rotatably supports the pinion gear and is connected to the crankshaft of the generator 124 . The sun gear is connected to the rotation shaft of motor generator 120 . The ring gear is connected to the rotation shaft of the motor generator 122 and the drive wheel 128 .

System main relay SMR1 is disposed between power storage device 40 and PCU 110 . System main relay SMR1 electrically connects power storage device 40 and PCU 110 when signal SE1 from ECU 130 is activated, and disconnects the circuit between power storage device 40 and PCU 110 when signal SE1 is not activated.

PCU 110 includes boost converter 112 and inverters 114 , 116 . Boost converter 112 boosts the voltage of positive line PL2 to a voltage equal to or higher than the output voltage of power storage device 40 in response to signal PWC from ECU 130 . This step-up converter 112 is constituted by, for example, a DC chopper circuit. Inverters 114, 116 are provided corresponding to motor generators 120, 122, respectively. Inverter 114 drives motor generator 120 based on signal PWI1 from ECU 130 , and inverter 116 drives motor generator 122 based on signal PWI2 from ECU 130 . Inverters 114 and 116 are constituted by, for example, a three-phase bridge circuit.

On the other hand, the power receiving resonator 20 includes a secondary self-resonant coil 22 and a secondary coil 24 . The secondary coil 24 is arranged on the same axis as the secondary self-resonant coil 22 , and can be magnetically coupled (coupled) to the secondary self-resonant coil 22 by electromagnetic induction. The secondary coil 24 takes out the electric power received by the secondary self-resonant coil 22 by electromagnetic induction, and outputs it to the rectifier 35 via the cable 30 .

The rectifier 35 rectifies the AC power extracted from the secondary coil 24 . System main relay SMR2 is disposed between rectifier 35 and power storage device 40 . System main relay SMR2 electrically connects power storage device 40 and rectifier 35 when signal SE2 from ECU 130 is activated, and disconnects the circuit between power storage device 40 and rectifier 35 when signal SE2 is not activated.

ECU 130 generates signals PWC, PWI1 , and PWI2 for respectively driving boost converter 112 and motor generators 120 , 122 based on accelerator pedal position and/or vehicle speed, and signals from various other sensors, and uses the generated signals PWC, PWI1, and PWI2 are output to boost converter 112 and inverters 114, 116, respectively. Furthermore, when the vehicle is running, ECU 130 activates signal SE1 to turn on system main relay SMR1 and deactivates signal SE2 to turn off system main relay SMR2.

Also, when power is supplied from the power supply facility ( FIG. 1 ) to electric vehicle 1 , ECU 130 activates signal SE2 to turn on system main relay SMR2 . A DC/DC converter may be provided between the rectifier 35 and the power storage device 40 . Furthermore, the electric power rectified by the rectifier 35 can be converted into a voltage level of the power storage device 40 by a DC/DC converter and output to the power storage device 40 .

By making both system main relays SMR1 and SMR2 conductive, electric power can also be received from the power supply facility during running of electric vehicle 1 .

As described above, in Embodiment 1, the power receiving resonator 20 receives high-frequency power from the power transmitting resonator 60 by resonating with the power transmitting resonator 60 of the power feeding facility via an electromagnetic field. The power receiving resonator 20 is arranged under the iron underbody 10, so electromagnetic waves generated around the power receiving resonator 20 are shielded by the underbody 10 as the high-frequency power is received, and the electromagnetic waves can be suppressed from being transmitted to the interior of the vehicle. Impact. In addition, when the electromagnetic wave generated by receiving electric power propagates through the cable 30 for transmitting the electric power received by the power receiving resonator 20 to the power storage device 40 , in this electric vehicle, the cable 30 is also arranged on an iron The lower part of the lower vehicle body 10, so electromagnetic waves generated from the cables 30 are also shielded by the lower vehicle body 10. Therefore, according to Embodiment 1, it is possible to suppress adverse effects of electromagnetic waves generated when electric power is received from the power supply equipment on electric equipment in the vehicle.

Furthermore, in Embodiment 1, when the power storage device 40 is arranged on the upper surface of the underbody 10 (that is, inside the vehicle), by covering the power storage device 40 with the member 42 capable of shielding electromagnetic waves, it is possible to more sufficiently suppress the impact of electromagnetic waves on the vehicle. influence within. Furthermore, in Embodiment 1, since the rectifier 35 is also disposed under the lower body 10 (that is, outside the vehicle), it is possible to reliably suppress the influence of electromagnetic waves on the vehicle interior.

[Modification 1]

FIG. 7 is a diagram showing the arrangement of main parts of the invention as viewed from the vehicle side of the electric vehicle according to Modification 1 of Embodiment 1. FIG. Referring to FIG. 7 , in electric vehicle 1A, power storage device 40 is disposed under rear seat 44 in the configuration of electric vehicle 1 shown in FIG. 1 . Other configurations of the electric vehicle 1A are the same as those of the electric vehicle 1 described above. Although not shown in particular, power storage device 40 may be disposed under the front seat.

The same effect as that of the first embodiment can be obtained by this modification 1 as well.

[Modification 2]

FIG. 8 is a diagram showing the arrangement of main parts of the invention as viewed from the vehicle side in an electric vehicle according to Modification 2 of Embodiment 1. FIG. Referring to FIG. 8 , in electric vehicle 1B, power storage device 40 is disposed under a center console 46 . The other main configurations of the electric vehicle 1B are the same as those of the electric vehicle 1 according to the first embodiment.

The same effect as that of Embodiment 1 can be obtained also in this Modification 2. FIG.

[Embodiment 2]

FIG. 9 is a view showing the arrangement of main parts of the invention viewed from the side of the vehicle with respect to the electric vehicle according to Embodiment 2. FIG. Referring to FIG. 9 , in an electric vehicle 1C, in the configuration of the electric vehicle 1 according to the first embodiment shown in FIG. i.e. outside the vehicle). Other main structures of the electric vehicle 1C are the same as those of the electric vehicle 1 .

Fig. 10 is an enlarged view around the underbody of the electric vehicle shown in Fig. 9 . Referring to FIG. 10 , in this electrically powered vehicle 1C, power storage device 40 is also disposed under iron lower body 10 (that is, outside the vehicle). The power storage device 40 is arranged under the lower body 10 (that is, outside the vehicle), and since the power storage device 40 is electrically connected to the cable 30 and the resonator 20 for power reception through the rectifier 35 , the high-frequency electromagnetic wave accompanying power reception It can propagate to the power storage device 40 . Therefore, instead of covering the power storage device 40 disposed on the upper part of the lower body 10 (that is, inside the vehicle) with the member 42 capable of shielding electromagnetic waves, the lower part of the lower body 10 made of iron having a high electromagnetic shielding effect (that is, outside the vehicle) By arranging the power storage device 40, it is possible to reliably suppress electromagnetic waves from reaching the interior of the vehicle.

As described above, in Embodiment 2, power storage device 40 is disposed under iron underbody 10 (that is, outside the vehicle), so electromagnetic waves generated from power storage device 40 are also shielded by underbody 10 . Therefore, according to the second embodiment as well, it is possible to suppress adverse effects on electrical equipment in the vehicle due to electromagnetic waves generated when electric power is received from the power supply equipment.

In each of the above-mentioned embodiments, a series/parallel type hybrid vehicle in which the power of the engine 124 is distributed by the power distribution device 126 so as to be transmitted to the drive wheels 128 and the motor generator 120 has been described as an electric vehicle, but the present invention also It can be applied to other forms of hybrid vehicles. That is, the present invention is also applicable to, for example, a so-called series hybrid vehicle in which the engine 124 is used only to drive the motor generator 120 and only the motor generator 122 generates the driving force of the vehicle, and only the kinetic energy generated by the engine 124 is used. Hybrid vehicles in which regenerative energy is recovered as electric energy, motor-assisted hybrid vehicles in which the engine is used as the main power and the motor is assisted as needed.

In addition, the present invention can also be applied to an electric vehicle that does not include the engine 24 and runs only on electric power, or a fuel cell vehicle that includes a fuel cell as a DC power supply in addition to the power storage device 40 . In addition, the present invention is also applicable to an electric vehicle that does not include boost converter 112 .

It should be considered that the embodiments disclosed this time are illustrative and restrictive in all respects. The scope of the present invention is shown not by the description of the above-mentioned embodiment but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Claims (6)

1. An electric vehicle capable of running on electric power supplied from a power source external to the vehicle, the electric vehicle having: A resonator (20) for power reception is arranged under the metal underbody (10), and is configured to resonate with a resonator (60) for power transmission of the power source through an electromagnetic field to receive power from the resonator (60) for power transmission. The resonator receives power; a power storage device (40) disposed on the upper portion of the lower vehicle body and storing electric power received by the power receiving resonator; and a cable (30) arranged at a lower portion of the lower vehicle body together with the power receiving resonator and configured to transmit electric power received by the power receiving resonator to the power storage device, The electric cable is routed from the power receiving resonator to below the power storage device in a front-rear direction of the electric vehicle at a lower portion of the lower vehicle body. 2. The electric vehicle according to claim 1, wherein: The cable is configured to pass through the underbody from below the power storage device and enter the interior of the vehicle. 3. The electric vehicle according to claim 1, wherein: The power storage device is covered with a member (42) capable of shielding electromagnetic waves. 4. The electric vehicle of claim 2, wherein: The power storage device is covered with a member (42) capable of shielding electromagnetic waves. 5. The electric vehicle according to any one of claims 1 to 4, wherein: A rectifier (35) configured to rectify the AC power received by the power receiving resonator is also provided, The rectifier is arranged at the lower part of the lower vehicle body. 6. The electric vehicle of claim 5, wherein: The rectifier is disposed below the power storage device.