In micro, mini and small satellites because of needs for higher bus voltage and small required battery capacities, batteries are nearly always used in series combinations of multiple cells. When a series string of cells is charged as a group, a single current is imposed on all the cells. However, if the voltages begin to differ, the result is a charge imbalance that can lead ultimately to batte...

SOC (State Of Charge) estimation based battery management is important for HEV (Hybrid Electric Vehicle) applications. There are many difficulties in SOC estimation of HEV NiMH (Nickel Metal Hydroxide) batteries, for example, gassing at charge, self discharge, hysteresis and relaxation of OCV (Open Circuit Voltage), memory effect during charge-discharge cycling, and so on. In this paper, a mode...

development of an eco-friendly, low cost and high energy density limnpo4 cathode material has attracted much attention due to its high operating voltage vs. li falling within the electrochemical stability window of conventional electrolyte solutions and offers more safety features due to the presence of a strong p-o covalent bond.synthesis of battery materials integrates the battery technology ...

A charge equalisation circuit is proposed for the series-connected battery bank in a serial charging scheme. The charge equalisation is based on buck–boost conversion, and hence is essentially nondissipative. The subcircuit associated with each battery acts as a current diverter to transfer the excess charging current from the fully charged batteries to the flat ones. By dynamic redistribution ...

A suitable sizing of electrical energy amount necessary to be stored on board is one of the most important conditions to assure the optimal operational environment of modern automotive vehicles. The paper presents a short synthesis of an original method to determine the available energy (capacity) or state of charge (SOC) of the on board leadacid starting battery of land automotive vehicles, de...

Based on the application of the power batteries, this paper uses a statistical method to estimate the internal resistance and open-circuit voltage of Ni-MH battery. Battery status is monitored and simulated by battery pack test bench. Through using ideal battery model and fitting the data of measured voltage and current, the battery internal resistance and open-circuit voltage are estimated. Th...

I I I I advanced lightweight technologies for the Ballistic Missile Defense Organization (BMDO). One of the key technologies was the first use of a multi-cell nickel hydrogen (NiH2) cornmon pressure vessel (CPV) battery. The 5.0 inch diameter, 22 cell, 15.0 ampere-hour NiH2 CPV battery was manufactured by Johnson Controls Battery Group Inc., (JCBGI). Battery test and integration was performed b...

We present a simulation and realization of a battery charge regulator (BCR) in microsatellite earth observation. The tests were performed on battery pack 12volt, capacity 24Ah and the solar array open circuit voltage of 100 volt and optimum power of about 250 watt. The battery charge is made by solar module. The principle is to adapt the output voltage of the solar module to the battery by usin...

OBJECTIVE We aimed in this investigation to study deep brain stimulation (DBS) battery drain with special attention directed toward patient symptoms prior to and following battery replacement. BACKGROUND Previously our group developed web-based calculators and smart phone applications to estimate DBS battery life (http://mdc.mbi.ufl.edu/surgery/dbs-battery-estimator). METHODS A cohort of 32...