Technical Paper
Using Magnetic Susceptibility in Realtime Battery Monitoring: One Solution for Micro-Hybrid, Hybrid and Electric Automobiles
2012-04-16
2012-01-0667
In previous decades, automobile batteries were used to start the car. Now, with stop-start technologies and renewed interest in electric vehicles, automotive battery management systems must be more accurate and sophisticated. Most battery management systems use different correlates (typically, voltage measurements or Coulomb counting) to estimate how much energy remains within the battery. The efficacy of these estimation techniques is sub-optimal because they rely on correlative data sources. Described herein is a novel approach that precisely determines the state of charge for lead-acid and lithium ion batteries by directly measuring the material changes within the battery across different states of charge.
