| Summary: | 碩士 === 清雲科技大學 === 電子工程研究所 === 94 === A method of predicting state of charge (SOC) of dynamic loading battery by using fuzzy theory is introduced in this thesis. Three kinds of well-known current waveforms, sine, square, and saw-tooth, will be considered as dynamic loadings. The idea comes from the real energy consumption of an automobile battery is dynamic also.
At first, some loading conditions, such as constant-current and the three well-known dynamic loadings were used in experiments where voltages and voltage variations of batteries were recorded as reference data. Base on the reference data, a fuzzy SOC predicting method was organized. Then, the method was verified by using other dynamic conditions with different frequencies.
Actually, the SOC predicting for dynamic loadings is very complicated and not many researchers touched on this topic. After a lot of efforts have been done, we find the best accuracy of our SOC predicting method for dynamic loading experiments in this thesis is approaches 93%.
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