Measurement of impedance and conductance: myth and reality tested in the field

摘要: Over the past 15 years, impedance and conductance measurement techniques have been intensively studied as a solution for rapidly determining aging of lead-acid batteries [see e.g. Alzieu et al. (1)]. This increasing popularity has supported by appearance industrial test equipment on market. These adopted significant number operators who pool batteries, although some them remain silent suspicious in this respect. France Telecom, along with various telecommunications throughout world [Kniveton (2), Rosolem (3)], considers that constitutes potential should be investigated view to reducing costs time involved battery operations, while maintaining an acceptable level regarding reliability results. action is part global approach rationalize use financial human resources, encouraging cost control measures. Given serious studies published over few years specialized press [Hlavac Feder (4), Huet (5)], Telecom carried out little testing laboratory. After having taken decision give verdict validity technique more generalized network, mid May-1999, technical exchanges manufacturers users was stressed, one hand, well implementation appliances field authentic operating situation other. The interest being recognized, it above all interesting to: firstly validate apparatus maintenance technicians (ergonomics, measurement, exploitation findings, wish new piece equipment,...); secondly, criteria defectiveness generally admitted. Finally, all, confirm advantage compared traditional methods characterization health currently force. paper introduces environment operation defined Telecom. We then concentrate procedures choosing corresponds requirements field, conforms different uses lead operator (telecommunications centers, client sites, mobile network hardware, local loop etc.). experiments were two regions their results are described. feedback from allows estimation profitability. Beyond investment gains time, linked incidents avoided, therefore reduction complaints, they will not undergo interrupted access. attention paid its also dominating factor. conclusion rest latest development tests at