VRLA battery discharge reserve time estimation

The discharge reserve time of a valve regulated lead acid (VRLA) battery is dependent on both discharge operating conditions as well as battery condition. Operating conditions include discharge type and rate, ambient temperature and initial state of charge while battery conditions include battery state of health and battery type. For this reason determining the discharge reserve time can be a very complex problem. This paper presents a simple approach for estimating VRLA battery state of charge (SOC) and thus discharge reserve time during discharge over a wide range of operating and battery conditions. A discharge characteristic, referred to as the unified characteristic, is employed that is shown to be robust to variations in operating conditions as well as battery condition. Furthermore, the resulting accurate estimations of SOC (within 10%) and reserve time (within 10% from the early stages of the discharge) do not come at the cost of complexity.

[1]  I. Kurisawa,et al.  Capacity estimating method of lead-acid battery by short-time discharge-introduction of approximate expression of discharge curve obtained by compound expression of straight line and hyperbola , 1997, Proceedings of Power and Energy Systems in Converging Markets.

[2]  A. H. Anbuky,et al.  VRLA battery capacity estimation using soft computing analysis of the coup de fouet region , 2000, INTELEC. Twenty-Second International Telecommunications Energy Conference (Cat. No.00CH37131).

[3]  N. Osifchin.  An infrastructure for telecommunications power in a new era in public networking , 2000, TELESCON 2000. Third International Telecommunications Energy Special Conference (IEEE Cat. No.00EX424).

[4]  Adnan H. Anbuky,et al.  VRLA battery state-of-charge estimation in telecommunication power systems , 2000, IEEE Trans. Ind. Electron..

[5]  Xiang Xiao-min.  Estimation of VRLA Battery Capacity Using the Analysis of the Coup de Fouet , 2006 .