C1.1 - Miniaturized Impedance Measurement System for Battery Diagnosis
- Event
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg - Band
- Proceedings SENSOR 2009, Volume I
- Chapter
- C1 - Sensor Electronics I
- Author(s)
- U. Troeltzsch, O. Kanoun - Technische Universität Chemnitz, Chemnitz, Germany
- Pages
- 251 - 256
- DOI
- 10.5162/sensor09/v1/c1.1
- ISBN
- 978-3-9810993-4-8
- Price
- free
Abstract
Battery diagnosis information is required for many applications. Relevant quantities are state of charge (SOC), ampere hour capacity and internal resistance. Impedance spectroscopy is a preferred method for battery diagnosis because of its ability to separate individual mechanisms due to their different frequency behavior. A prototype for a miniaturized low-cost impedance measurement system was realized especially for battery diagnosis. For impedance measurement a digital signal processing method was used. A sinusoidal signal was used as excitation signal. Special care was dedicated to the correction of parasitic effects due to parasitic wire capacitances and the parasitic capacitance of discrete circuit elements. The developed system is compact and can be integrated in different applications.