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Within electrified vehicle powertrains, lithium-ion battery performance degrades with aging and usage, resulting in a loss in both energy and power capacity. As a result, models used for system design and control algorithm development would ideally capture the impact of those efforts on battery capacity degradation, be computationally efficient, and simple enough to be used for algorithm development...
To the requirements that SOC equalization system for real-time data acquisition and accuracy of voltage, temperature and current of each single battery, using the special battery test chips- LTC6804-1 made in the company of Linear which have been cascaded and combining microprocessors of Freescale KEA128 series can complete the data collection to a large number of cells in a relatively short period...
The voltage, current and temperature are used as input variables in this paper. The SOC estimation of the lithium iron phosphate battery is achieved by the method of multivariate adaptive regression splines (MARS). The data obtained by the test is standardized, which can be then used in the train of the SOC estimation mathematical model. After that the model is verified. The simulation results show...
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