# US 2023/0057789 A1 · Wireless power transfer system, vehicle, server, and power transmission device

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- Number: US 2023/0057789 A1
- Document ID: US20230057789A1
- Status: Published application
- Kind: A1
- Application number: 17/818,735
- Filed: 2022-08-10
- Published: 2023-02-23
- Earliest claimed: 2021-08-20
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Takahiro HIRANO; Shogo TSUGE; Ryosuke IKEMURA; Yohei ARINO; Masaki ITO; Yuki TAKAHASHI
- Web page: https://patentgrep.com/patent/US20230057789A1

## CPC

- B60L 53/39: with position-responsive activation of primary coils
- B60L 53/122: Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
- B60L 53/305: {Communication interfaces}
- B60L 53/37: using optical position determination, e.g. using cameras
- B60L 53/66: Data transfer between charging stations and vehicles
- H02J 50/10: using inductive coupling
- H02J 50/40: using two or more transmitting or receiving devices (H02J50/50 takes precedence)
- H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings
- H02J 7/02: for charging batteries from AC mains by converters
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric vehicles
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A wireless power transfer system includes a first power transmission unit, a second power transmission unit, a power reception unit, a sensing unit, and an ECU. The first power transmission unit is provided in a parking space. The second power transmission unit is provided in a traveling lane for a vehicle. The sensing unit senses a sensing target in a sensing region set around the vehicle. When the sensing unit senses the sensing target, the ECU reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle. The ECU sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.

## Claims

### Claim 1

A wireless power transfer system comprising:
a first power transmission unit provided in a parking space,
a second power transmission unit provided in a traveling lane for a vehicle;
a power reception unit that wirelessly receives electric power from the first power transmission unit or the second power transmission unit;
a sensing unit that senses a sensing target in a sensing region set around the vehicle when the power reception unit receives electric power from the first power transmission unit or the second power transmission unit; and
a controller that, when the sensing unit senses the sensing target, reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle, wherein
the controller sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.

### Claim 2 (depends on 1)

The wireless power transfer system according to claim 1, wherein, when the sensing target is sensed, the controller more reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle as a distance between the sensing target and the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle is shorter.

### Claim 3 (depends on 1)

The wireless power transfer system according to claim 1, wherein, when the sensing target is sensed, the controller stops the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle.

### Claim 4

A vehicle comprising:
a power reception unit that wirelessly receives electric power from a first power transmission unit provided in a parking space or a second power transmission unit provided in a traveling lane for a vehicle; and
a controller that, when a sensing unit senses a sensing target in a sensing region set around the vehicle, reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle, wherein
the sensing unit senses the sensing target when the power reception unit receives electric power from the first power transmission unit or the second power transmission unit, and
the controller sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.

### Claim 5 (depends on 4)

The vehicle according to claim 4, wherein, when the sensing target is sensed, the controller more reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle as a distance between the sensing target and the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle is shorter.

### Claim 6 (depends on 4)

The vehicle according to claim 4, wherein, when the sensing target is sensed, the controller stops the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle.

### Claim 7

A server of a system including a first power transmission unit provided in a parking space, a second power transmission unit provided in a traveling lane for a vehicle, a power reception unit that wirelessly receives electric power from the first power transmission unit or the second power transmission unit, and a sensing unit that senses a sensing target in a sensing region set around the vehicle when the power reception unit receives electric power from the first power transmission unit or the second power transmission unit, the server comprising:
an acquisition unit that acquires sensing information indicating that the sensing unit senses the sensing target; and
a controller that, when the acquisition unit acquires the sensing information, reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle, wherein
the controller sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.

### Claim 8 (depends on 7)

The server according to claim 7, wherein, when the sensing target is sensed, the controller more reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle as a distance between the sensing target and the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle is shorter.

### Claim 9 (depends on 7)

The server according to claim 7, wherein, when the sensing target is sensed, the controller stops the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle.

### Claim 10

A power transmission device comprising:
a power transmission unit that is provided in a parking space and wirelessly transmits electric power to a power reception unit provided in a vehicle;
a sensing unit that senses a sensing target in a parking space sensing region as a sensing region set around the vehicle when the power transmission unit transmits electric power to the power reception unit; and
a controller that, when the sensing unit senses the sensing target, reduces electric power transmitted from the power transmission unit, wherein
the power reception unit is capable of wirelessly receiving electric power from a traveling lane power transmission device provided in a traveling lane,
the traveling lane power transmission device senses a sensing target in a traveling lane sensing region as a sensing region set around the vehicle when the traveling lane power transmission device transmits electric power to the power reception unit, and
the controller sets the parking space sensing region to be larger than the traveling lane sensing region.

### Claim 11

A power transmission device comprising:
a power transmission unit that is provided in a traveling lane and wirelessly transmits electric power to a power reception unit provided in a vehicle;
a sensing unit that senses a sensing target in a traveling lane sensing region as a sensing region set around the vehicle when the power transmission unit transmits electric power to the power reception unit; and
a controller that, when the sensing unit senses the sensing target, reduces electric power transmitted from the power transmission unit, wherein
the power reception unit is capable of wirelessly receiving electric power from a parking space power transmission device provided in a parking space,
the parking space power transmission device senses a sensing target in a parking space sensing region as a sensing region set around the vehicle when the parking space power transmission device transmits electric power to the power reception unit, and
the controller sets the traveling lane sensing region to be smaller than the parking space sensing region.