By Valer Pop, Henk Jan Bergveld, Dmitry Danilov, Paul P. L. Regtien, Peter H. L. Notten
Battery administration structures: actual State-of-Charge Indication for Battery-Powered purposes describes the sector of State-of-Charge (SoC) indication for rechargeable batteries. With the emergence of battery-powered units thoroughly estimating the battery SoC, or even extra very important the remainder time of use, turns into increasingly more vital. an outline of the state of the art of SoC indication equipment together with to be had marketplace options from top semiconductor businesses, e.g. Texas tools, Microchip, Maxim, is given within the first a part of this booklet. additionally, a common SoC indication procedure that permits 1% or larger accuracy less than all practical person stipulations is constructed. a potential integration with a newly constructed ultra-fast recharging set of rules can be defined. The contents of this e-book builds extra at the contents of the 1st quantity within the Philips examine publication sequence, Battery administration structures - Design by means of Modelling. because the topic of battery SoC indication calls for a couple of disciplines, this booklet covers all very important disciplines ranging from (electro)chemistry to appreciate battery behaviour, through arithmetic to permit modelling of the saw battery behaviour and dimension technological know-how to allow exact dimension of battery variables and evaluation of the general accuracy, to electric engineering to allow a good implementation of the constructed SoC indication procedure. it's going to for that reason function an incredible resource of data for anyone operating in engineering and all in favour of battery administration.
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Additional info for Battery Management Systems: Accurate State-of-Charge Indication for Battery-Powered Applications (Philips Research Book Series)
The term EMF stands for electromotive force. It is a battery’s internal driving force for providing energy to a load. In principle, the EMF can be inferred from thermodynamic data and the Nernst equation (or equations derived from it) . Another method with which the EMF can be obtained is called linear interpolation. With this method the average battery voltage, calculated at the same SoC, is inferred from the battery voltages during two consecutive discharge and charge cycles using the same currents and at the same temperature.
This led to the invention of the first voltaic cell, better known as a battery. In 1859 the French physicist Gaston Planté invented the first rechargeable battery. This secondary battery was based on lead–acid (LA) chemistry, a system that is still used today. In 1899 the Swedish Waldmar Jungner invented the nickel– cadmium (NiCd) battery, based on nickel for the positive and cadmium for the negative electrode. Two years later, Edison came up with an alternative design by replacing cadmium with iron.
As an alternative, Dowgiallo et al. (1975) and Zaugg (1982) developed methods for determining a battery’s SoC on the basis of impedance measurements , . The phase angle between the ac voltage across the battery terminals and the ac current through the battery (measured as a voltage through a sense resistor) is continuously monitored. The method presented in  relates to nickel–cadmium batteries and can be used in equipment such as transmitters, receivers, tape recorders, movie cameras, aircraft, electric vehicles, small calculators and computers.
Battery Management Systems: Accurate State-of-Charge Indication for Battery-Powered Applications (Philips Research Book Series) by Valer Pop, Henk Jan Bergveld, Dmitry Danilov, Paul P. L. Regtien, Peter H. L. Notten