Wirelessly rechargeable power supply device

Patent metadata

Field	Value
Publication number	US-2025392169-A1
Application number	US-202519227732-A
Country	US
Kind code	A1
Filing date	Jun 4, 2025
Priority date	Jun 25, 2024
Publication date	Dec 25, 2025
Grant date	—

Abstract

A wirelessly rechargeable power supply device includes a housing, a substrate, a power storage device, and a power receiving antenna. The substrate, the power storage device, and the power receiving antenna are accommodated in the housing. The substrate includes a first main surface and a second main surface opposite to the first main surface. A power receiving circuit is mounted on the substrate. The power receiving antenna includes a first antenna located at a side of the substrate corresponding to the first main surface, and a second antenna located at a side of the substrate corresponding to the second main surface. The first antenna and the second antenna each include a dipole antenna. A direction in which an element of the first antenna extends coincides with a direction in which an element of the second antenna extends.

First claim

What is claimed is:

1 . A wirelessly rechargeable power supply device, comprising:
a housing; a substrate; a power storage device; and a power receiving antenna, wherein: the substrate, the power storage device, and the power receiving antenna are accommodated in the housing, the substrate includes a first main surface and a second main surface opposite to the first main surface, a power receiving circuit configured to charge the power storage device with power received by the power receiving antenna is mounted on the substrate, the power receiving antenna includes a first antenna located at a side of the substrate corresponding to the first main surface, and a second antenna located at a side of the substrate corresponding to the second main surface, the first antenna and the second antenna each include a dipole antenna, and a direction in which an element of the first antenna extends coincides with a direction in which an element of the second antenna extends.

2 . The wirelessly rechargeable power supply device according to claim 1 , wherein, in a side view of the wirelessly rechargeable power supply device as viewed in the direction in which the element of the first antenna extends, the first antenna and the second antenna are separated from each other in a circumferential direction of the substrate by an angle in a range of 165 degrees to 180 degrees, inclusive.

3 . The wirelessly rechargeable power supply device according to claim 1 , wherein the power storage device is arranged between the first main surface of the substrate and the first antenna.

4 . The wirelessly rechargeable power supply device according to claim 1 , wherein
the first antenna and the second antenna each include a flexible printed circuit board antenna, and the first antenna and the second antenna are arranged along an inner circumference of the housing.

5 . The wirelessly rechargeable power supply device according to claim 1 , wherein
the substrate is rectangular and has a long side extending in a longitudinal direction and a short side extending in a transverse direction, and the direction in which the element of the first antenna extends and the direction in which the element of the second antenna extends coincide with the longitudinal direction.

6 . The wirelessly rechargeable power supply device according to claim 1 , further comprising:
a first coaxial cable and a second coaxial cable, wherein the first antenna is connected to the power receiving circuit via the first coaxial cable, and the second antenna is connected to the power receiving circuit via the second coaxial cable.

7 . The wirelessly rechargeable power supply device according to claim 1 , further comprising:
a communication antenna, wherein the communication antenna is configured to receive radio waves from a device external to the wirelessly rechargeable power supply device, and transmit radio waves to the device external to the wirelessly rechargeable power supply device, and the power receiving circuit is configured to control communication with the device external to the wirelessly rechargeable power supply device.

8 . The wirelessly rechargeable power supply device according to claim 1 , wherein the wirelessly rechargeable power supply device is cylindrical and includes a positive electrode on a top surface and a negative electrode on a bottom surface.

Assignees

• Toyoda Gosei Kk

Inventors

• Suzuki Tsubasa
• Sakai Tomokazu
• Tokuyama Yuki
• Fuki Shinichiro

Classifications

• H01Q1/248

  provided with an AC/DC converting device, e.g. rectennas · CPC title

• H02J50/27 Primary

  characterised by the type of receiving antennas, e.g. rectennas · CPC title

• H02J50/402

  the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas · CPC title

• H02J50/005 Primary

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title