COIL MODULE FOR CONTACTLESS ELECTRIC POWER TRANSFER, AND BATTERY PACK AND CHARGING DEVICE PROVIDED WITH SAME

摘要

A coil module (35) for contactless electric power transfer is provided with a first coil (41) which is wound in a plane and a magnetic sheet (40) on which the first coil is disposed. The coil module (35) transfers, by means of electromagnetic induction, electric power between the first coil and a second coil (51) which is disposed so as to face the first coil. The magnetic sheet (40) includes protrusions (43, 44) protruding toward the second coil (51) and located either at the center of the first coil (41) and/or outside the first coil (41).