State-of-charge determination of lead-acid batteries using wire-wound coils |
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| Affiliation: | 1. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, Ottawa, Ont., Canada K1A 0R6;2. Defence Research and Development Branch, National Defence Headquarters, 305 Rideau Street, Ottawa, Ont., Canada K1A 0K2;1. Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis, Université de Tunis El-Manar, Campus Universitaire Farhat Hached d''El-Manar, Tunis 2092, Tunisia;2. Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Facultad de Ciencias, CSIC-Universidad de Zaragoza, E-50009 Zaragoza, Spain;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;2. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;3. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, PR China;2. Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. Department of Chemistry, Bharathiar University, Coimbatore 641 046, India;2. Department of Chemistry, Nirmala College for Women, Bharathiar University, Coimbatore 641018, India;3. Department of Physics, Bharathiar University, Coimbatore 641 046, India |
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| Abstract: | Non-intrusive monitoring of the state-of-charge of sealed lead-acid batteries using wire-wound coils is described. Coils were attached to the plastic case of the batteries, adjacent to the negative end plate, and excited using ac current at 10 kHz. As the batteries were cycled, the inductance of the coils tracked the change in metallic content of the end plates. Data is presented for different discharge rates and temperatures. A variation of the technique is also described that uses less expensive equipment to measure the voltage drop across the coil, rather than inductance. |
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