MOBILE TERMINAL CHARGING DEVICE AND VEHICLE MOUNTED WITH SAME
First Claim
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1. A mobile terminal charging device comprising:
- a support plate whose front surface side is used as a mobile terminal placement portion;
a charging coil that is disposed to be movable in a state of opposing the support plate on a rear surface side of the support plate;
a driver that can move the charging coil on the rear surface side of the support plate;
a controller that is connected to the charging coil and the driver;
a memory that is connected to the controller; and
a plurality of foreign object detection coils and a plurality of position detection coils that are provided on the support plate and are connected to the controller,wherein the charging coil is provided with a first detection coil, and a second detection coil disposed inward of the first detection coil and having a smaller diameter than a diameter of the first detection coil,the first and second detection coils are connected to the controller,the memory stores a reference resonance frequency or a reference resonance voltage of each of the plurality of foreign object detection coils for each location where the charging coil is present,wherein the controlleralternately performs an operation of detecting a foreign object by driving some of the plurality of foreign object detection coils and then an operation of detecting a location where the charging coil is present by driving the plurality of position detection coils, in a state before conduction of the charging coil,performs a safety operation when the plurality of foreign object detection coils detect a foreign object in a case where a resonance frequency detected by one of the plurality of foreign object detection coils corresponding to a location where the charging coil is present is higher than the reference resonance frequency stored in the memory, or a resonance voltage detected by one of the plurality of foreign object detection coils corresponding to a location where the charging coil is present is lower than the reference resonance voltage stored in the memory, andcauses the charging coil to be conducted in a case where a location where the charging coil is present is detected by the plurality of position detection coils, and performs a safety operation if a ratio (V2/V1) of a second voltage (V2) detected by the second detection coil to a first voltage (V1) detected by the first detection coil is less than a set value after the charging coil is conducted.
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Abstract
In a mobile terminal charging device, when a charging coil is not being enegized, a control unit alternately performs foreign object detection by driving some of a plurality of foreign object detection coils followed by charging coil location detection by driving a plurality of position detection coils. When the charging coil is being energized, foreign object detection is performed using a large-diameter detection coil and a small-diameter coil with which the charging coil is fitted.
29 Citations
13 Claims
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1. A mobile terminal charging device comprising:
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a support plate whose front surface side is used as a mobile terminal placement portion; a charging coil that is disposed to be movable in a state of opposing the support plate on a rear surface side of the support plate; a driver that can move the charging coil on the rear surface side of the support plate; a controller that is connected to the charging coil and the driver; a memory that is connected to the controller; and a plurality of foreign object detection coils and a plurality of position detection coils that are provided on the support plate and are connected to the controller, wherein the charging coil is provided with a first detection coil, and a second detection coil disposed inward of the first detection coil and having a smaller diameter than a diameter of the first detection coil, the first and second detection coils are connected to the controller, the memory stores a reference resonance frequency or a reference resonance voltage of each of the plurality of foreign object detection coils for each location where the charging coil is present, wherein the controller alternately performs an operation of detecting a foreign object by driving some of the plurality of foreign object detection coils and then an operation of detecting a location where the charging coil is present by driving the plurality of position detection coils, in a state before conduction of the charging coil, performs a safety operation when the plurality of foreign object detection coils detect a foreign object in a case where a resonance frequency detected by one of the plurality of foreign object detection coils corresponding to a location where the charging coil is present is higher than the reference resonance frequency stored in the memory, or a resonance voltage detected by one of the plurality of foreign object detection coils corresponding to a location where the charging coil is present is lower than the reference resonance voltage stored in the memory, and causes the charging coil to be conducted in a case where a location where the charging coil is present is detected by the plurality of position detection coils, and performs a safety operation if a ratio (V2/V1) of a second voltage (V2) detected by the second detection coil to a first voltage (V1) detected by the first detection coil is less than a set value after the charging coil is conducted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Application NumberUS15/127,114Publication NumberTime in Patent OfficeDaysField of SearchUS Class CurrentCPC Class CodesH02J 50/005 Mechanical details of housi...H02J 50/12 of the resonant typeH02J 50/60 responsive to the presence ...H02J 50/90 involving detection or opti...H02J 7/0042 characterised by the mechan...
