M any features of modern portable electronic devices—such as high-speed processors, colorful displays, opti-cal/magnetic storage drives, and wireless network interfaces—carry a significant energy cost. However, advances in battery technology have not kept pace with rapidly growing energy demands. Most laptops, handheld PCs, and cell phones use rechargeable electrochemical batteries—typically, l...

Battery energy storage systems (BESSs) are commonly used in smart grids. Voltage deviation or imbalance among cells generally exists multi-cell battery packs. This work presents a study of the voltage deviation-related phenomena observed during operation grid-tied BESS, Willenhall Energy Storage System (WESS), including changes full range cycle and cut-off mechanism activated by it. Electroimpe...

Analytical models have been developed to diminish test procedures for product realization, but they have only been partially successful in consistently predicting the performance of battery systems. The complex set of interacting physical and chemical processes within battery systems have made the development of analytical models to be a significant challenge. Advanced simulation tools are need...

The specific energy of the existing lithium ion battery cells is limited because intercalation electrodes made of activated carbon (AC) materials have limited lithium ion storage capacities. Carbon nanotubes, graphene, and carbon nanofibers are the most sought alternatives to replace AC materials but their synthesis cost makes them highly prohibitive. Silicon has recently emerged as a strong ca...

Battery energy storage system (BESS) is evolving to be a major part of the modern power systems due high controllability and simple implementation. In this paper, general structure BESS its components are reviewed focusing mainly on battery unit in hierarchal order from cell pack terms modeling, design, wiring. The effect weakest cell-to-cell variations also mentioned perspective charging their...

The pulse-based charging method for battery cells has been recognized as a fast and efficient way to overcome the shortcoming of a slow charging time in distributed battery cells, which is regarded as a connection of cells such as the Internet of Things (IoT). The pulse frequency for controlling the battery charge duration is dynamically controlled within a certain range in order to inject the ...

Among the power drills ( Electrical/ Pneumatic/Battery ) used in Orthopedic surgery, battery drill has got several advantages. Surgeons in low resource settings could not routinely use Orthopedic battery drills (OBD) due to the prohibitive cost of good drills or poor quality of other drills. “Hardware” or Engineering battery drill (HBD) is a viable alternative to OBD. HBD is easy to procure, ru...

the present study was designed to develop a preliminatory cognitive screeting test battery for differentiating brain damaged patients, from psychiatric patients and normal subjects.based on previous researches, the items scales, administraion and scoring instructions for the test battery were prepared. the test included the following scales: attention, memory, construction ability, receptive la...

Based on the problems caused by today conventional vehicles, much attention has been put on the fuel cell vehicles researches. However, using a fuel cell system is not adequate alone in transportation applications, because the load power profile includes transient that is not compatible with the fuel cell dynamic. To resolve this problem, hybridization of the fuel cell and energy storage device...