# US 12,119,670 B2 · Power reception device for wireless power supply system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,670 B2 - Document ID: US12119670B2 - Status: Granted - Kind: B2 - Application number: 17/472,356 - Filed: 2021-09-10 - Published: 2021-12-30 - Granted: 2024-10-15 - Earliest claimed: 2019-03-18 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Osamu Miki; Tatsuya Hosotani - Web page: https://patentgrep.com/patent/US12119670B2 ## CPC - H02J 50/402: {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} - H02J 7/02: for charging batteries from AC mains by converters - H02J 50/12: of the resonant type - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H02J 7/70: characterised by the mechanical construction - H02J 50/005: {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} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A power reception device includes a plurality of power-receiving coils, a plurality of rectifier elements, and a convergent output smoothing capacitor. The plurality of power-receiving coils are positioned in place relative to the housing in such a manner that the plurality of power-receiving coils each include first conductor portions extending along a side surface of the housing. The plurality of rectifier elements are connected respectively to the plurality of power-receiving coils. The convergent output smoothing capacitor stores electric energy output from the plurality of rectifier elements. ## Claims ### Claim 1 A power reception device for a wireless power supply system, comprising: a columnar body having a space defined therein; a plurality of power-receiving coils arranged along an exterior of the columnar body; a plurality of resonance capacitors connected respectively to at least two of the plurality of power-receiving coils to configure a plurality of resonant circuits; a plurality of discrete rectifier elements electrically connected respectively to the at least two of the plurality of power-receiving coils; a plurality of smoothing capacitors, each connected to a respective one of the discrete rectifier elements; and a convergent output smoothing capacitor electrically connected to the plurality of discrete rectifier elements, wherein electric energy output from the plurality of discrete rectifier elements converges in the convergent output smoothing capacitor for storage and supply of power, the columnar body is wrapped with the plurality of power-receiving coils that are arranged in a manner so as not to coincide with each other along a perimeter defined by at least one side surface of the columnar body, and the plurality of discrete rectifier elements are disposed within the columnar body. ### Claim 2 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of power-receiving coils are equally spaced along the perimeter of the columnar body. ### Claim 3 (depends on 1) The power reception device for the wireless power supply system according to claim 1, further comprising: a magnetic sheet disposed between the columnar body and the plurality of power-receiving coils. ### Claim 4 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of power-receiving coils are each constructed of a bendable insulating sheet and a conductor pattern extending linearly on the bendable insulating sheet. ### Claim 5 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of smoothing capacitors are each connected in series to configure a plurality of series circuits, and the plurality of series circuits are connected to the convergent output smoothing capacitor. ### Claim 6 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of resonant circuits each including a corresponding one of the at least two of the plurality of power-receiving coils are circuits of different resonant frequencies. ### Claim 7 (depends on 1) The power reception device for the wireless power supply system according to claim 1, further comprising: a secondary battery electrically connected to the convergent output smoothing capacitor, wherein the secondary battery is disposed within the columnar body. ### Claim 8 (depends on 1) The power reception device for the wireless power supply system according to claim 1, further comprising: a secondary battery electrically connected to the convergent output smoothing capacitor, wherein the columnar body is an exterior of the secondary battery. ### Claim 9 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of discrete rectifier elements are respectively included in half-wave rectifier circuits or full-wave rectifier circuits. ### Claim 10 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein the plurality of discrete rectifier elements are respectively included in voltage-doubler rectifier circuits or current-doubler rectifier circuits. ### Claim 11 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein at least a portion of the columnar body is cylindrical in shape. ### Claim 12 (depends on 1) The power reception device for the wireless power supply system according to claim 1, wherein at least a portion of the columnar body is cuboid in shape. ### Claim 13 (depends on 2) The power reception device for the wireless power supply system according to claim 2, further comprising: a magnetic sheet disposed between the columnar body and the plurality of power-receiving coils. ### Claim 14 (depends on 2) The power reception device for the wireless power supply system according to claim 2, wherein the plurality of power-receiving coils are each constructed of a bendable insulating sheet and a conductor pattern extending linearly on the bendable insulating sheet. ### Claim 15 (depends on 2) The power reception device for the wireless power supply system according to claim 2, wherein the plurality of smoothing capacitors are each connected in series to configure a plurality of series circuits, and the plurality of series circuits are connected to the convergent output smoothing capacitor. ### Claim 16 (depends on 2) The power reception device for the wireless power supply system according to claim 2, wherein the plurality of resonant circuits each including a corresponding one of the at least two of the plurality of power-receiving coils are circuits of different resonant frequencies. ### Claim 17 (depends on 2) The power reception device for the wireless power supply system according to claim 2, further comprising: a secondary battery electrically connected to the convergent output smoothing capacitor, wherein the secondary battery is disposed within the columnar body.