# US 2014/0197784 A1 · Wireless side charging > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197784 A1 - Document ID: US20140197784A1 - Status: Published application - Kind: A1 - Application number: 14/152,246 - Filed: 2014-01-10 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Vishay Dale Electronics, Inc. - Applicants: Vishay Dale Electronics, Inc. - Inventors: Randall B. Boldt - Web page: https://patentgrep.com/patent/US20140197784A1 ## CPC - H02J 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)} - H01F 38/14: Inductive couplings - H02J 7/02: for charging batteries from AC mains by converters - H02J 50/10: using inductive coupling - 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: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Devices to be charged and wireless charging devices are disclosed. A DTBC includes a processing unit, a battery, an axially wound receiver coil and battery charging components. The battery powers the processing unit. The axially wound receiver coil has a first end and a second end located at opposite ends of a central axis of the axially wound receiver coil and receives electromagnetic flux via either one of the first end or the second end. The battery charging components are coupled between the battery and the axially wound receiver coil, convert the electromagnetic flux into direct current (DC) and apply the DC to charge the battery. ## Claims ### Claim 1 A device to be charged (DTBC) comprising: a processing unit; a battery configured to power the processing unit; an axially wound receiver coil comprising a first end and a second end located at opposite ends of a central axis of the axially wound receiver coil, the axially wound receiver coil being configured to receive electromagnetic flux via either one of the first end or the second end; and battery charging components coupled between the battery and the axially wound receiver coil, the battery charging components being configured to convert the electromagnetic flux into direct current (DC) and apply the DC to charge the battery. ### Claim 2 (depends on 1) The device of claim 1, further comprising a casing that houses the processing unit, the battery and the battery charging components, the casing comprising a front surface, a back surface and a side surface, wherein the axially wound receiver coil is disposed within the casing such that the electromagnetic flux is received by the axially wound receiver coil through the side surface of the casing. ### Claim 3 (depends on 2) The device of claim 2, wherein the axially wound receiver coil is disposed within the casing such that the first end and the second end of the axially wound receiver coil are adjacent the side surface of the casing. ### Claim 4 (depends on 1) The device of claim 1, wherein the axially wound receiver coil is a gumstick type receiver coil. ### Claim 5 (depends on 1) The device of claim 1, wherein the battery charging components comprise: an alternating current (AC) to DC converter configured to receive the electromagnetic flux from the axially wound inductive receiver coil and to provide a DC; and a battery charger configured to apply the DC to charge the battery. ### Claim 6 (depends on 1) The device of claim 1, wherein the device is one of a cellular telephone, a notebook personal computer (PC) and a laptop computer. ### Claim 7 A wireless charging device comprising: a casing comprising a front surface, a back surface and a side surface; and a charging coil configured to emit an electromagnetic flux through the side surface of the casing to charge a battery disposed in an external device. ### Claim 8 (depends on 7) The wireless charging device of claim 7, wherein the charging coil is an axially wound charging coil comprising at least one end surface located at an end of a central axis, the charging coil being configured to emit the electromagnetic flux via the at least one end surface through the side surface of the casing to charge the battery disposed in the external device. ### Claim 9 (depends on 8) The wireless charging device of claim 8, wherein the at least one end surface is disposed adjacent the side surface of the casing. ### Claim 10 (depends on 8) The wireless charging device of claim 8, wherein the axially wound charging coil is a horseshoe-type charging coil comprising at least two legs and a connecting portion that connects each of the at least two legs, the horseshoe-type charging coil being configured to provide the electromagnetic flux via an end surface of at least one of the at least two legs and through the side surface of the casing to charge the battery disposed in the external device. ### Claim 11 (depends on 8) The wireless charging device of claim 8, wherein the wireless charging device comprises a plurality of axially wound charging coils. ### Claim 12 (depends on 11) The wireless charging device of claim 11, wherein: the casing is polygonal-shaped such that the side surface has at least four portions, and the plurality of axially wound charging coils are disposed within the casing such that the at least one end surface of each of the plurality of axially wound charging coils is adjacent one of the at least four portions of the side surface. ### Claim 13 (depends on 11) The wireless charging device of claim 11, wherein the plurality of axially wound charging coils are disposed within the casing such that the at least one end surface of each of the plurality of axially wound charging coils is adjacent a different one of the at least four portions of the side surface. ### Claim 14 (depends on 11) The wireless charging device of claim 11, wherein the plurality of axially wound charging coils are disposed within the casing such that the at least one end surface of at least two of the plurality of axially wound charging coils is adjacent the same one of the at least four portions of the side surface. ### Claim 15 (depends on 7) The wireless charging device of claim 7, further comprising: an axially wound receiver coil comprising a first end and a second end located at opposite ends of a central axis of the axially wound receiver coil, the axially wound receiver coil being configured to receive electromagnetic flux via either one of the first end or the second end; and battery charging components coupled between the battery and the axially wound receiver coil, the battery charging components being configured to convert the electromagnetic flux into direct current (DC) and apply the DC to charge the battery. ### Claim 16 (depends on 15) The wireless charging device of claim 15, wherein the wireless charging device is one of a cellular telephone, a notebook personal computer (PC) and a laptop computer.