An energy harvesting system for use with a vehicle including an RF transmitter positionable in a vehicle and a key fob having an antenna configured to receive an RF signal from the RF transmitter and convert the RF signal to electrical energy, a power management circuit configured to distribute the electrical energy in the key fob, and an energy storage device configured to store at least some of the electrical energy converted from the RF signal.

Energy harvesting system

Provided is a battery device for controlling charge/discharge of a secondary battery by a single bidirectionally conductive field effect transistor, a charge/discharge control circuit with which a leakage current of the bidirectionally conductive field effect transistor is reduced to perform stable operation. The charge/discharge control circuit includes: a switch circuit for controlling a gate of the bidirectionally conductive field effect transistor based on an output of a control circuit for controlling the charge/discharge of the secondary battery; and two MOS transistors for preventing back-flow of a charge current and a discharge current. The first MOS transistor has a drain and a back gate which are connected to each other, and a source connected to a drain of the bidirectionally conductive field effect transistor. The second MOS transistor has a drain and a back gate which are connected to each other, and a source connected to a source of the bidirectionally conductive field effect transistor.

Charge and discharge control circuit and battery device

A system and a method of long-term condition monitoring of structures are based on use of autonomous sensing modules, centers for storing and processing data and software for data analysis. An autonomous sensing module contains a set of sensors for measurements of parameters related to the condition of a monitored structure, a non-volatile memory, a wireless data transfer unit, a controller, a clock circuit, a battery, an energy harvesting device and a power management unit. The autonomous sensing module provides a very long-term (40 years or more) functionality and reliability due to both use of at least near hermetic packages for the controller, the non-volatile memory, the battery, the clock circuit and the power management unit and choosing the duration of periods when the sensing module works in active mode in such a way that the average energy consumed by the autonomous sensing module is fully compensated by the average energy harvested by the energy harvesting device.

Autonomous Sensing Module, a System and a Method of Long-Term Condition Monitoring of Structures

An electrochemical device is claimed and disclosed, including a method of manufacturing the same, comprising an environmentally sensitive material, such as, for example, a lithium anode; and a plurality of alternating thin metallic and ceramic, blocking sub-layers. The multiple metallic and ceramic, blocking sub-layers encapsulate the environmentally sensitive material. The device may include a stress modulating layer, such as for example, a Lipon layer between the environmentally sensitive material and the encapsulation layer.

Thin film encapsulation for thin film batteries and other devices

A wireless sensing module with extended service life containing at least one sensor of a physical parameter, a data acquisition hardware acquiring output electrical signals from at least one sensor and converting it into digital measurement data, a microcontroller, a non-volatile memory, at least one transceiver for wireless communication with external wireless devices, at least one battery, including at least one re-chargeable battery, at least one energy harvesting device, a power management circuit, and at least one antenna All components of the wireless sensing module are mounted on a printed circuit board and placed into an enclosure providing mechanical, chemical, electrical and environmental protection The wireless sensing modules can be used in different applications, including long-term condition monitoring of structures

Wireless Sensing Module and Method of Operation

Described herein is, for example, a battery or capacitor over voltage (overcharge) and under-voltage protection circuit, that, for example, is adapted to not draw current from the battery or capacitor to be charged unless charge energy is detected and to not charge an energy storage device when an over-charge condition is sensed. The protection circuit may, for example, not be turned on unless an over voltage condition is present. Incoming energy to the system can be shunted to ground via a shunt load of various types including resistive loads and active components such as a zener diode. In some embodiments, no switching of the inbound power is required. Within limits, no regulation of inbound power is needed. When inbound power is sufficient to charge the battery or capacitor, regulation can occur via the applied shunt regulator if overcharge voltage conditions exist. Either type of charge source, voltage or current, can be used to provide charge energy. Combining said battery or capacitor over voltage (overcharge) and under-voltage protection circuit with electronic loads, such as wireless sensors, may lead to autonomously-powered wireless sensor systems.

Passive over/under voltage control and protection for energy storage devices associated with energy harvesting

A user-powered apparatus, system, and method of providing a pedestrian with information is disclosed. The present invention harvests energy created by a moving pedestrian and takes the harvested energy and uses it to recharge an energy storage device that is embedded in the same footwear. Also built into the footwear may be a microcontroller and sensor, and a transmitter/receiver mechanism by which signals may be transmitted to and received from a wrist watch, iPod®, cell phone and/or any similar portable device on the pedestrian. The footwear may be capable of receiving signals transmitted by the portable device or GPS satellite. The GPS satellite may provide information about the geographical location of the pedestrian. Since the energy storage device may be flexible, it can survive on footwear that gets flexed a significant amount. The energy harvester may harvest energy from the footsteps of the pedestrian or some other source and recharge the energy storage device so that there is no need to replace the energy storage device that is an integral and inseparable part of the footwear.

Foot-powered footwear-embedded sensor-transceiver

The present invention relates to metal film encapsulation of an electrochemical device. The metal film encapsulation may provide contact tabs for the electrochemical device. The present invention may also include a selectively conductive bonding layer between a contact and a cell structure. The present invention may further include ways of providing heat and pressure resilience to the bonding layer and improving the robustness of the protection for the cell structure.

Robust metal film encapsulation

A system that powers a wireless sensor mechanism from ambient sources without the need to replace a battery is disclosed. The present invention uses an energy harvesting mechanism built onto, for example, a substrate to recharge a rechargeable energy storage mechanism that is built on the same substrate. The energy storage mechanism provides power to a transmission/receiving mechanism and microprocessor that may also be arranged on said substrate. The energy-harvesting mechanism may be combined with a power management unit to enable efficient use and regulation of the harvested energy.

Environmentally-powered wireless sensor module

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Papers

Passive over/under voltage control and protection for energy storage devices associated with energy harvesting

Foot-powered footwear-embedded sensor-transceiver

Robust metal film encapsulation

Environmentally-powered wireless sensor module