Development of Parameter System for Battery Monitoring and Control

Dr. Yuk Sum Wong, Prof. W. G. Hurley

This project plans to investigate the temperature correlation and proposes innovative solutions that will extend the life of the battery. This innovative research should result in a more efficient battery changing technology than currently exists and thus extending the life of a battery. Standard charging principles for charging Valve Regulated Lead Acid (VRLA) batteries in standby applications lead to constant overcharging. This results in excessive temperatures of the battery cells, which in turn degrades the chemical composition of the electrolyte in the battery and this results in a shorter battery life. Standard charging principles for charging Valve Regulated Lead Acid (VRLA) batteries in standby applications lead to constant overcharging. This results in excessive temperatures of the battery cells, which in turn degrades the chemical composition of the electrolyte in the battery and this results in a shorter battery life. A more efficient battery charging principle for standby VRLA batteries is the Intermittent Charge Control principle as described in reference [M Bhatt, W G Hurley, W H Wolfle, "A New Approach to Intermittent Charging of Valve-Regulated Lead-Acid Batteries in Standby Applications", IEEE Transactions on Industrial Electronics, vol. 52, no. 5, pp. 1337-1342, October 2005]. The high current pulse achieves a high level of chemical activation, while the average current is low and prevents the battery from overcharging. The average energy supplied to the battery in this mode needs to be correlated to the actual temperature of the battery cells. The lower the battery temperature the higher the average recharging current required. The results of this project will lead to a new product enhancement for the company, and will give a company competitive advantage in the market.

Start date: 1st of March 2007. This project has been completed.

Project collaborators: Convertec Ltd, Enterprise Ireland

Project Publications

Patent
W. H. Wölfle, W. G. Hurley, Y. S. Wong, “Battery Charger and Method”, European Patent Application No 07121927.3, November 2007. US Patent Application 2009/0140697, June 2009.

Journal
W. G. Hurley, Y. S. Wong, W. H. Wölfle, “ Self-Equalization of Cell Voltages to Prolong the Life of VRLA Batteries in Standby Applications”, IEEE Trans. on Industrial Electronics, vol. 56, no 6, pp. 2115-2120, June 2009. 
Y. S. Wong, W. G. Hurley, W. H. Wölfle, “Charge Regimes for Valve-Regulated Lead-Acid Batteries: Performance Overview Inclusive of Temperature Compensation”, Journal of Power Sources, vol. 183, no. 2, pp. 783-791, September 2008.

Conference
Y. S. Wong, W. G. Hurley, W. H. Wölfle, “Temperature Compensation Algorithm for Interrupted Charge Control Regime for a VRLA Battery in Standby Applications”, Proceedings of the 23rd IEEE Applied Power Electronics Conference, APEC’08, Austin, Texas, February 2008.

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