By Valer Pop, Henk Jan Bergveld, Dmitry Danilov, Paul P. L. Regtien, Peter H. L. Notten
ISBN-10: 1402069448
ISBN-13: 9781402069444
ISBN-10: 1402069456
ISBN-13: 9781402069451
Battery administration structures: exact 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 adequately estimating the battery SoC, or even extra very important the rest time of use, turns into an increasing number of vital. an summary of the state of the art of SoC indication equipment together with to be had industry strategies from prime semiconductor businesses, e.g. Texas tools, Microchip, Maxim, is given within the first a part of this ebook. moreover, a common SoC indication method that permits 1% or higher accuracy less than all lifelike person stipulations is built. a potential integration with a newly built ultra-fast recharging set of rules is additionally defined. The contents of this publication builds extra at the contents of the 1st quantity within the Philips learn publication sequence, Battery administration structures - Design by means of Modelling. because the topic of battery SoC indication calls for a few disciplines, this e-book covers all vital disciplines ranging from (electro)chemistry to appreciate battery behaviour, through arithmetic to allow modelling of the saw battery behaviour and size technological know-how to permit exact dimension of battery variables and evaluate of the final accuracy, to electric engineering to let a good implementation of the constructed SoC indication method. it's going to consequently function a huge resource of knowledge for any one operating in engineering and keen on battery administration.
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Extra info for Battery Management Systems: Accurate State-of-Charge Indication for Battery-Powered Applications (Philips Research Book Series)
Example text
15 shows an example of three subsets, defined by their membership functions, ‘cold’, ‘warm’ and ‘hot’, of the ‘universe of discourse’ ‘temperature’ set. Using the above method for a limited data set the maximum error between the measured SoC and the model-predicted SoC obtained for lithium–sulphur dioxide cells was found to be +/– 5%. 4 Summary A number of possible methods for SoC determination have been presented in this section. They were followed by descriptions of three of the best-known adaptive methods, which have as inputs measured battery variables such as voltage, impedance and current, and use these variables in order to accurately predict the SoC and the remaining time of use for an application.
Both Broussely and Spotnitz deal with the aging of the batteries under ‘on float’ condition, with the battery being kept under constant voltage of fixed polarity. A striking feature of all plots in the aforementioned articles is that they are smooth and do not have any transfer points. A first conclusion is that it will be difficult to take into account every nuance of a battery’s charge and discharge qualities and aging characteristics in an SoC indication system. 2 Battery types and characteristics NiCd batteries.
Models describing the dynamics of lithium consumption in Li-ion batteries are discussed by Broussely and Spotnitz in [8], [9]. Both Broussely and Spotnitz deal with the aging of the batteries under ‘on float’ condition, with the battery being kept under constant voltage of fixed polarity. A striking feature of all plots in the aforementioned articles is that they are smooth and do not have any transfer points. A first conclusion is that it will be difficult to take into account every nuance of a battery’s charge and discharge qualities and aging characteristics in an SoC indication system.
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
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