Loading [MathJax]/extensions/MathMenu.js
Electric vehicle charge optimization including effects of lithium-ion battery degradation | IEEE Conference Publication | IEEE Xplore

Electric vehicle charge optimization including effects of lithium-ion battery degradation


Abstract:

This paper presents a method for minimizing the cost of electric vehicle (EV) charging given variable electricity costs while also accounting for estimated costs of batte...Show More

Abstract:

This paper presents a method for minimizing the cost of electric vehicle (EV) charging given variable electricity costs while also accounting for estimated costs of battery degradation using a simplified lithium-ion battery lifetime model. The simple battery lifetime model, also developed and presented here, estimates both energy capacity fade and power fade due to temperature, state of charge profile, and daily depth of discharge. This model has been validated by comparison with a detailed model [6], which in turn has been validated through comparison to experimental data. The simple model runs quickly in a MATLAB script, allowing for iterative numerical minimization of charge cost. EV charge profiles optimized as described here show a compromise among four trends: charging during low-electricity cost intervals, charging slowly, charging towards the end of the available charge time, and suppression of vehicle-to-grid power exportation. Finally, simulations predict that batteries charged using optimized charging last longer than those charged using typical charging methods, potentially allowing smaller, cheaper batteries to meet vehicle lifetime requirements.
Date of Conference: 06-09 September 2011
Date Added to IEEE Xplore: 13 October 2011
ISBN Information:
Print ISSN: 1938-8756
Conference Location: Chicago, IL, USA

Contact IEEE to Subscribe

References

References is not available for this document.