Wireless charging based on selective activation of transmit antennas
First Claim
1. A wireless power transfer system, comprising:
- a plurality of transmit antennas configured to transmit power to one or more receive antennas of an electric vehicle positioned over a charging region, comprising;
a first transmit antenna configured to charge the electric vehicle positioned over the charging region, the first transmit antenna configured to charge the electric vehicle via a first area of the charging region; and
a second transmit antenna configured to charge the electric vehicle positioned over the charging region, the second transmit antenna configured to charge the electric vehicle via a second area of the charging region different than the first area of the charging region;
a controller circuit coupled to the plurality of transmit antennas, the controller circuit configured to selectively;
disable the first transmit antenna when a foreign object is detected in a first space that affects charging via the first area of the charging region;
maintain activation of the second transmit antenna while the electric vehicle is positioned to receive power from the second transmit antenna via the second area when the foreign object is detected in the first space; and
disable at least one of the plurality of transmit antennas when a total number of the plurality of transmit antennas is greater than a total number of the one or more receive antennas of the electric vehicle.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless power transfer system for selectively disabling a transmit antenna of a plurality of transmit antennas when a foreign object is detected is described. The system comprises a first transmit antenna configured to charge an electric vehicle positioned over a charging region via a first area of the charging region and also comprises a second transmit antenna configured to charge via a second area of the charging region. The system further comprises a controller circuit configured to selectively disable the first transmit antenna when a foreign object is detected in a first space that affects charging via the first area of the charging region. The controller circuit is further configured to selectively maintain activation of the second transmit antenna while the electric vehicle is positioned to receive power from the second transmit antenna via the second area when the foreign object is detected in the first space.
22 Citations
25 Claims
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1. A wireless power transfer system, comprising:
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a plurality of transmit antennas configured to transmit power to one or more receive antennas of an electric vehicle positioned over a charging region, comprising; a first transmit antenna configured to charge the electric vehicle positioned over the charging region, the first transmit antenna configured to charge the electric vehicle via a first area of the charging region; and a second transmit antenna configured to charge the electric vehicle positioned over the charging region, the second transmit antenna configured to charge the electric vehicle via a second area of the charging region different than the first area of the charging region; a controller circuit coupled to the plurality of transmit antennas, the controller circuit configured to selectively; disable the first transmit antenna when a foreign object is detected in a first space that affects charging via the first area of the charging region; maintain activation of the second transmit antenna while the electric vehicle is positioned to receive power from the second transmit antenna via the second area when the foreign object is detected in the first space; and disable at least one of the plurality of transmit antennas when a total number of the plurality of transmit antennas is greater than a total number of the one or more receive antennas of the electric vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of wireless power transfer, comprising:
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charging an electric vehicle positioned over a charging region via a first area of the charging region; charging the electric vehicle positioned over the charging region via a second area of the charging region that is different than the first area; disabling the charging via the first area when a foreign object is detected in a first space that affects the charging via the first area; maintaining the charging via the second area while the electric vehicle is positioned to receive power from the charging via the second area when the foreign object is detected in the first space; and selectively disabling a first transmit antenna of a plurality of transmit antennas when a total number of the plurality of transmit antennas is greater than a total number of one or more receive antennas of the electric vehicle. - View Dependent Claims (12, 13, 14)
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15. An apparatus for wirelessly transferring power, comprising:
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a plurality of means for charging an electric vehicle positioned over a charging region by transmitting power to one or more receiving means of the electric vehicle, comprising; first means for charging the electric vehicle positioned over the charging region via a first area of the charging region; and second means for charging the electric vehicle via a second area of the charging region different than the first area of the charging region; means for disabling the first means when a foreign object is detected in a first space that affects charging via the first area; means for maintaining activation of the second means while the electric vehicle is positioned to receive power from the second means when the foreign object is detected in the first space; and means for disabling at least one of the plurality of charging means when a total number of the plurality of char means is greater than a total number of the one or more receiving means of the electric vehicle. - View Dependent Claims (16, 17, 18)
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19. A wireless power transfer system, comprising:
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a plurality of transmit antennas configured to transmit power to one or more receive antennas of an electric vehicle positioned over a charging region; a controller circuit coupled to the plurality of transmit antennas, the controller circuit configured to selectively disable at least one of the plurality of transmit antennas when a total number of the plurality of transmit antennas is greater than a total number of the one or more receive antennas of the electric vehicle. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification