# US 8,771,852 B2 · Battery pack with contactless power transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,852 B2 - Document ID: US8771852B2 - Status: Granted - Kind: B2 - Application number: 13/398,901 - Filed: 2012-02-17 - Published: 2012-06-14 - Granted: 2014-07-08 - Earliest claimed: 2009-08-25 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Masato Nomura - Inventors: Masato Nomura - Web page: https://patentgrep.com/patent/US8771852B2 ## CPC - H02J 50/10: using inductive coupling - H01F 27/36: Electric or magnetic shields or screens (movable for varying inductance H01F21/10) - H01F 27/366: {made of ferromagnetic material} - H01M 50/119: Metals - H01M 50/121: Organic material - H01M 50/122: Composite material consisting of a mixture of organic and inorganic materials - 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 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H01F 38/14: Inductive couplings - Y02E 60/10: Energy storage using batteries - 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 - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A battery pack that includes a secondary battery, a resin structure including the secondary battery, and a flat-shaped, contactless power transfer coil embedded at a first face side of the resin structure. The resin structure contains a magnetic material at least at the first face side thereof. ## Claims ### Claim 1 A battery pack comprising: a secondary battery; a resin structure including the secondary battery; and a flat-shaped, contactless power transfer coil embedded at a first face side of the resin structure, wherein the resin structure contains a magnetic material at least at the first face side thereof, and wherein the resin structure comprises a plurality of faces that are perpendicular to the first face side of the resin structure and the plurality of side faces of the resin structure contain the magnetic material. ### Claim 2 (depends on 1) The battery pack according to claim 1, wherein a part of the flat-shaped, contactless power transfer coil is not embedded by the resin structure at the first face side. ### Claim 3 (depends on 1) The battery pack according to claim 1, wherein the resin structure contains the magnetic material only at the first face side thereof. ### Claim 4 (depends on 1) The battery pack according to claim 1, wherein a second face side of the resin structure opposite the first face side has a thermal conductivity higher than that at the first face side. ### Claim 5 (depends on 1) The battery pack according to claim 1, wherein the resin structure includes a terminal board including a plurality of external terminals connectable to an external device. ### Claim 6 (depends on 5) The battery pack according to claim 5, wherein at least a first external terminal of the plurality of external terminals is connected to electrodes of the secondary battery and the external terminals connected to ends of the flat-shaped, contactless power transfer coil. ### Claim 7 (depends on 5) The battery pack according to claim 5, wherein at least a first external terminal of the plurality of external terminals is connected to an end of the flat-shaped, contactless power transfer coil. ### Claim 8 (depends on 5) The battery pack according to claim 5, wherein the resin structure includes a first member and a second member, and the secondary battery is disposed between the first member and the second member. ### Claim 9 (depends on 1) The battery pack according to claim 1, wherein each end of the flat-shaped, contactless power transfer coil is connected to a respective external terminal provided at the first face side of the resin structure. ### Claim 10 (depends on 1) The battery pack according to claim 1, wherein the resin structure includes a circuit module configured to transfer charging power through the flat-shaped, contactless power transfer coil in the secondary battery. ### Claim 11 (depends on 1) The battery pack according to claim 1, wherein the battery pack is configured to be housed in a battery pack container in an external device, and wherein the battery pack is configured to be mounted so that the first face side of the resin structure is in contact with a cover of the battery pack container. ### Claim 12 (depends on 1) The battery pack according to claim 1, wherein the resin structure includes a first member and a second member. ### Claim 13 (depends on 12) The battery pack according to claim 12, wherein the first member and the second member contain the magnetic material. ### Claim 14 (depends on 12) The battery pack according to claim 12, wherein the first member contains the magnetic material and the second member does not contain the magnetic material. ### Claim 15 (depends on 12) The battery pack according to claim 12, wherein an amount of the magnetic material in the second member is smaller than an amount of the magnetic material in the first member.