Provision of energy to wireless sensor networks is crucial for their sustainable operation. Sensor nodes are typically equipped with batteries as their operating energy sources. However, when the sensor nodes are sited in almost inaccessible locations, replacing their batteries incurs high maintenance cost. Under such conditions, wireless charging of sensor nodes by a mobile charger with an ant...

The Long Life (Lithium Ion) Battery (LLB/LIB) is designed to replace the current Extravehicular Mobility Unit (EMU) Silver/Zinc (Ag/Zn) Increased Capacity Battery (ICB), which is used to provide power to the Primary Life Support Subsystem (PLSS) during Extravehicular Activities (EVAs). The LLB (a battery based on commercial lithium ion cell technology) is designed to have the same electrical an...

A DC-DC converter that can be applied for battery chargers with the power-capacity of over 7-kW for electric vehicles (EVs) is presented in this paper. Due to a new architecture, the proposed converter achieves a reduction of conduction losses at the primary side by as much as 50% and has many benefits such as much smaller circulating current, less duty-cycle loss, and lower secondary-voltage s...

Using mobile chargers in wireless rechargeable sensor networks is an option for charging the nodes due to the high cost of power chargers. In order to achieve some performance requirement such as coverage, it is necessary to effectively schedule the mobile chargers to serve every node in the network. We notice that nearly all previous works on mobile charger scheduling assume that the mobile ch...

Measuring and attesting to the operational integrity and security posture of a mobile device is challenging. Today, smart phones and tablet computers lack a number of traditional security features that have emerged for commodity laptops and desktops. In addition to restricted power, mobile devices generally don’t have a hardware root-of-trust and currently lack ubiquitous virtualization capabil...

We study energy-transfer processes from a given quantum system, termed charger, to another one, i.e., the proper battery both in closed and an open setting. quantify fraction EB(τ) of energy stored that can be extracted order perform thermodynamic work. show there substantial gap between average extractable work due correlations created by charger–battery interactions.

─ This paper presents a voltage doubler in to a half bridge converter is derived for electric vehicle battery chargers. The proposed converter provides wide ZVS range, reduced circulating current and also voltage stress. Circulating current during the freewheeling phases of phase shift full bridge circuit are reset by the sum of LLC circuit output voltage and resonant capacitor voltage by achie...

This article describes a battery charger, which is powered by thermoelectric (TE) power modules. This system uses TE devices that directly convert heat energy to electricity to charge a battery. The characteristics of the TE module were tested at different temperatures. A SEPIC dc–dc converter was applied and controlled by a microcontroller with the maximum power point tracking (MPPT) feature. ...

This paper presents a new multi-function conversion technique for vehicle-to-grid (V2G) applications. The proposed bi-directional charger can achieve three functions, including EV battery charging, grid-connection and reactive compensation, which are keys for energy management of the grid. With the proposed multi-function technology, the bi-directional charger will benefit both the grid and ele...