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The development of electrically driven cars focuses primarily on the battery since this is the restraining factor for driving range and performance. In addition to this DC characteristic, the battery also has a high-frequency behaviour which has to be evaluated in order to ensure proper functionality, system stability, supply voltage quality and EMC. This paper explains three different methods to...
Electrochemical impedance spectroscopy or ac impedance methods are popularly used for the diagnosis of electrochemical generators (batteries or fuel cell). It is now possible to acquire and quantitatively interpret the experimental electrical impedances of such systems, whose evolutions indirectly reflect the modifications of the internal electrochemical process. The scope of these measurement methods...
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