Variable power energy harvesting system
First Claim
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1. A single-chip system for harvesting energy from a variable output energy harvesting apparatus comprising:
- energy harvesting apparatus for providing energy input;
a switched mode power supply operably coupled to receive the input of the ene harvesting apparatus, and for providing a system output power signal; and
a control loop having control logic for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, thereby regulating the system output power signal, wherein the control loop further comprises a battery temperature sensor apparatus having components that are contained in the single chip system, the battery temperature sensing apparatus having a plurality of temperature sensing ranges selectable as a function of a battery temperature, and the control loop configured to select a regulation voltage across the battery as a function of the battery temperature sensing ranges.
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Abstract
Systems for harvesting energy from a variable output energy harvesting apparatus are disclosed. The systems include an energy harvesting apparatus for providing energy input to a switched mode power supply and a control loop for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, whereby system output power is substantially optimized to the practical. Exemplary embodiments include systems for harvesting energy using solar cells in boost, buck, and buck-boost configurations.
34 Citations
18 Claims
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1. A single-chip system for harvesting energy from a variable output energy harvesting apparatus comprising:
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energy harvesting apparatus for providing energy input; a switched mode power supply operably coupled to receive the input of the ene harvesting apparatus, and for providing a system output power signal; and a control loop having control logic for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, thereby regulating the system output power signal, wherein the control loop further comprises a battery temperature sensor apparatus having components that are contained in the single chip system, the battery temperature sensing apparatus having a plurality of temperature sensing ranges selectable as a function of a battery temperature, and the control loop configured to select a regulation voltage across the battery as a function of the battery temperature sensing ranges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for harvesting energy from variable output energy harvesting apparatus comprising:
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an energy harvesting apparatus configured to provide an energy input; a single chip system comprising; a switched mode power supply operably coupled to receive the input of the energy harvesting apparatus, and configured to provide a system output power signal; and a control loop having control logic configured to dynamically adjust the energy input to the switched mode power supply as a function of battery hysteresis and batten′
temperature, wherein the control loop is adapted to provide hysteretic input voltage regulation by using a plurality of temperature sensing ranges selectable as a function of a battery temperature, and the control loop configured to select a regulation voltage across the battery as a function of the battery temperature sensing ranges. - View Dependent Claims (16)
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17. A system for harvesting energy variable output energy harvesting apparatus comprising:
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an energy harvesting apparatus for providing energy input; a single chip system comprising; a switched mode power supply operably coupled to receive the input of the energy harvesting apparatus, and configured to provide a system output power signal; and a control loop having control logic for dynamically adjusting the energy input to the switched mode power supply as a function of battery temperature by using a plurality of response curves having different degrees of hysteresis, where each of the response curves is associated with a different temperature sensing range that is selectable as a function of a battery temperature and the control loop configured to select a regulation voltage across the battery as a function of the battery temperature sensing ranges. - View Dependent Claims (18)
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Specification