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公开(公告)号：US20240231408A1
公开(公告)日：2024-07-11
申请号：US18543801
申请日：2023-12-18
IPC分类号： G05F1/67
CPC分类号： G05F1/67
摘要： Systems and methods for energy harvesting are disclosed. An example method is performed by a computing device coupled to an energy harvesting circuit and includes identifying a first time period required for the energy harvesting circuit to complete a first number of energy extraction events, the first time associated with an initial harvest voltage, determining a first value of an estimated extracted power based on the initial harvest voltage and the first number of energy extraction events, and iteratively adjusting the harvest voltage and determining the optimal harvest voltage based at least in part on values of the estimated extracted power value corresponding to the adjusted harvest voltage.
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公开(公告)号：US11070093B1
公开(公告)日：2021-07-20
申请号：US16866944
申请日：2020-05-05
摘要： This disclosure provides a method and apparatus for optimizing power transfer from radio-frequency (RF) rectifiers to a voltage regulator. A first RF rectifier may be configured to generate a first voltage and a second RF rectifier may be configured to generate a second voltage, where the second voltage is an open circuit output voltage. The voltage regulator may regulate the first voltage to provide power. A controller may be configured to optimize power transfer from the first RF receiver to the voltage regulator based on the first voltage and the second voltage.
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公开(公告)号：US11070092B2
公开(公告)日：2021-07-20
申请号：US16384195
申请日：2019-04-15
摘要： This disclosure provides a method and apparatus for controlling a plurality of radio-frequency (RF) power harvesters configured to generate power from received RF signals. A controller may monitor output power from the RF power harvesters and a sequence of reset signals. Based on the output powers and the sequence of reset signals, the controller may couple the RF power harvesters to a charge-storage device and one or more voltage regulators. In some implementations, the controller may also monitor RF envelope amplitude and couple the RF power harvesters to the charge storage device based on RF envelope amplitude.
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公开(公告)号：US20240235240A1
公开(公告)日：2024-07-11
申请号：US18127190
申请日：2023-03-28
CPC分类号： H02J7/007182 , H02J7/00032 , H02J7/0063 , H02J7/345 , H02J7/35 , H02J9/04 , H02J50/001 , H02J50/20
摘要： A method for powering a wireless device includes determining a presence or absence of a USB power source connected to the wireless device, determining a presence or absence of a battery connected to the wireless device, obtaining a level of energy harvested from a surrounding environment of the wireless device, and powering a load of the wireless device using one of the USB power source, the battery, or the harvested energy based on the presence or absence of the USB power source, the presence or absence of the battery, and the harvested energy level.
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公开(公告)号：US20240235234A1
公开(公告)日：2024-07-11
申请号：US18124974
申请日：2023-03-22
IPC分类号： H02J7/00 , G05F1/56 , H01M10/0525 , H01M10/42 , H01M10/44 , H01M50/109 , H02J7/34 , H02J50/00 , H02J50/20 , H02J50/80
CPC分类号： H02J7/007 , G05F1/56 , H01M10/0525 , H01M10/4264 , H01M10/44 , H01M50/109 , H02J7/345 , H02J50/001 , H02J50/20 , H02J50/80 , H01M2220/30 , H02J2207/20
摘要： A wireless device includes an energy harvester configured to convert energy harvested from radio-frequency (RF) signals into a harvested voltage, a storage capacitor to store a voltage, a first port selectively connected to an external USB power source, a second port connected to a battery, a load including a non-volatile memory storing configuration data indicating a plurality of charging configurations, and a power management circuit including a controller and a switcher matrix. The controller is configured to select one of the plurality of charging configurations based on one or more of a presence of a connection with the external USB power source, a type of the battery, an amount of the harvested voltage, or a level of the voltage stored on the storage capacitor. The switcher matrix is configured to charge the battery based on the selected charging configuration.
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公开(公告)号：US20240235235A1
公开(公告)日：2024-07-11
申请号：US18124962
申请日：2023-03-22
CPC分类号： H02J7/00712 , G05F1/56 , H01M10/0525 , H01M10/4264 , H01M10/48 , H02J7/0048 , H02J7/0063 , H02J7/345 , H02J50/001
摘要： A wireless device includes an energy harvester to convert harvested energy into a harvested voltage, a first port selectively connected to an external USB power source, a second port selectively connected to a battery, a load including a plurality of circuits, and a power management circuit coupled to the energy harvester, the first and second ports, and the load. The power management circuit includes a controller configured to select one of the energy harvester, the USB power source, or the battery as a power source at system startup based on one or more of an amount of the harvested voltage, a presence of a connection with the USB power source, a presence of a connection with the battery, or an amount of charge or voltage stored by the battery. The power management circuit also includes a switcher matrix to power the load at system startup using the selected power source.
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