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Due to the powertrain electrification in electric- and hybrid vehicles enormous challenges arise considering the electromagnetic compatibility (EMC) of the vehicles. The power electronic components used produce high broadband interferences possibly affecting vehicle components located in the 12V system. In order to meet these challenges the traction system is built up thoroughly shielded and isolated...
This paper presents a fast cost-effective technique for the measurement of battery impedance online in an application such as an electric or hybrid vehicle. Impedance measurements on lithium-ion batteries between 1 Hz and 2 kHz give information about the electrochemical reactions within a cell, which relates to the state of charge (SOC), internal temperature, and state of health (SOH). We concentrate...
We present a fast, low-cost approach to measure battery impedance ‘on-line’ in a vehicle across a range of frequencies (1–2000 Hz). Impedance measurement has promise for improving battery management since it is a very effective non-invasive method of diagnosing the internal state of an electrochemical cell. It is useful for estimating temperature, ageing, state of charge (SOC) and for fault detection...
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