公开(公告)号：US20210167631A1

公开(公告)日：2021-06-03

申请号：US16770698

申请日：2018-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazunori SATO ,  Hiroshi KANNO

IPC: H02J50/05 ,  H02J50/12 ,  H02J7/02 ,  B60L53/122 ,  B60L53/20

Abstract: A wireless power transmission system includes a power transmitting device and a power receiving device. The power transmitting device includes: a first inverter circuit to output charging power to be directed to power transmission; a power transmitting antenna; and a first control circuit to control the first inverter circuit. The power receiving device includes: a power receiving antenna; and a trigger application circuit to apply, to detecting power to be supplied to the power receiving antenna, a trigger signal for informing of the power transmitting device of the presence of the power receiving device. Upon detecting the trigger signal, the first control circuit causes the first inverter circuit to begin outputting the charging power.

公开(公告)号：US20220149657A1

公开(公告)日：2022-05-12

申请号：US17598518

申请日：2020-03-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO.,LTD.

Inventor： Kazunori SATO ,  Satoru KIKUCHI

IPC: H02J50/05 ,  H02J50/90 ,  H02J50/40 ,  H02J7/02 ,  H02J7/00 ,  H02J50/12 ,  B60L53/12 ,  B60L53/22 ,  B60L53/62

Abstract: A power receiving device includes: a power receiving antenna to wirelessly receive AC power from a power transmitting antenna in a power transmitting device; a power receiving circuit to convert the AC power received by the power receiving antenna into DC power and to output the DC power; a charge-discharge control circuit to control charging and discharging of an electrical storage device to be charged by the DC power output from the power receiving circuit; and a switching circuit connected between the power receiving circuit and the charge-discharge control circuit and between the electrical storage device or the other electrical storage device and the charge-discharge control circuit. The charge-discharge control circuit is booted by energy that is stored in the electrical storage device or another electrical storage device. The switching circuit switches between a first state in which power is supplied from the electrical storage device or the other electrical storage device to the charge-discharge control circuit and a second state in which power is supplied from the power receiving circuit to the charge-discharge control circuit.