Abstract— Battery is one of the important components in development renewable energy technology. This paper presents a method for estimating State Charge (SoC) 4Ah Li-ion battery. status capacity battery form percentage which makes it easier to monitor during use. Coulomb calculations are widely used, but this still contains errors integration. In paper, SoC measurement using Open Circuit Volta...

Estimating the state of charge is important for any battery operated device. In case of automobile batteries, which are designed to deliver large power, many methods such as open circuit voltage based, ampere hour counting based, impedance based are used for calculating the state of charge. Internal resistance of a battery at a particular temperature directly gives the information about the sta...

Original scientific paper The fast and accurate estimation of state of charge (SOC) of lithium-ion battery is one of the key technologies of battery management system. In view of this nonlinear dynamic system of lithium battery, through the test and analysis of lithium-ion battery hysteresis characteristics, the second-order RC hysteresis model is established, and the cubature Kalman filter alg...

A new valve regulated lead-acid (VRLA) gel motive power battery and PV system power center have been tested in the laboratory and at a PV hybrid telecommunication site. The power center provides battery charge control, system remote communications, and data acquisition at the field test site. Extensive laboratory and field-test data were used to improve battery performance by optimizing, regula...

The entropy changes ( S) in various cathode and anodematerials, as well as in complete Li-ion batteries, were measured using an electrochemical thermodynamic measurement system (ETMS). LiCoO2 has a much larger entropy change than electrodes based on LiNixCoyMnzO2 and LiFePO4, while lithium titanate based anodes have lower entropy change compared to graphite anodes. The reversible heat generatio...

This paper presents a method to determine the internal resistance of a bank of deep-cycle lead acid batteries that are part of a stand-alone photo-voltaic system. Both the charge and discharge resistances are calculated as a function of the state-of-charge (SOC) of the battery from daily variations in battery terminal voltage as well as charge and discharge currents. The method is illustrated b...

In this paper, examples of polarization measurements with a battery, electric double-layer capacitor, and fuel cell are discussed. The analysis the real analytical methodology described. battery section, rate capability is examined in detail origin different properties Charge/discharge tests self-discharge performed capacitor. Detailed measurement conditions data methods introduced section. con...

This paper presents a real-time strategy for active power sharing in a fuel cell powered battery charging station. This control scheme can adjust the charging currents of the batteries being simultaneously charged in real-time according to the estimated state-of-charge (SOC) which is obtained by estimating the battery open-circuit voltage with current correction and linearly fitting between the...

Pham, Huan Le M.S.M.E., Purdue University, December 2013. Health Diagnosis of Lithium-ion Battery Cell Using Vibration-based Test and Analysis. Major Professor: Dr. Douglas E. Adams, School of Mechanical Engineering. With their superior advantages of high capacity and low percentage of self-discharge, lithium-ion batteries, which are most commonly used as power sources for hand-held electronic ...

A portable proton exchange membrane (PEM) fuel cell operates at room temperature, has an energy density which is 4 to 6 times larger than that of a Li-ion battery, and thus is a promising next generation power source for power-hungry portable devices. However, in spite of the high energy density, fuel cells have limited power capacity and cannot respond to sudden changes in the load. Thus, a sy...