NDLI: A novel on-line state-of-charge estimation algorithm for valve regulated lead-acid batteries used in hybrid electric vehicles

Content Provider	IEEE Xplore Digital Library
Author	Coroban, V. Boldea, I. Blaabjerg, F.
Copyright Year	2007
Abstract	A four state reconfigurable battery state of charge estimation algorithm combining the open circuit voltage (OCV) and its estimation and current integration is proposed in the present paper. In general, the open circuit voltage requires a few hours to become completely stabilized, when 100% confidence indicator is obtained. The proposed algorithm in its first state, works when the battery current is zero and 5 minutes within the OCV estimation process. For the second state, during constant current charging the battery state-of-charge (SOC) estimation is based on the previously measured look-up table that stores the battery voltage versus battery state-of-charge. In the third state the battery SOC is estimated by battery charging voltage vs. charging current characteristic stored in a look-up table. Finally, for the fourth state, during variable discharging current and regenerative breaking the battery SOC is estimated by current integration method. The four states of the estimation algorithm are self-identifiable and from here the reconfigurability property. The proposed algorithm is amply documented by experiments on a 48 Vdc, 55 Ah battery pack typical for mild hybrid electric vehicles.
Starting Page	39
Ending Page	46
File Size	437257
Page Count	8
File Format	PDF
ISBN	9781424408900
DOI	10.1109/ACEMP.2007.4510480
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-10
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuits state-of-charge lead-acid batteries Valves Battery charge measurement Table lookup Hybrid electric vehicles Vehicle dynamics Battery powered vehicles Voltage State estimation Monitoring hybrid vehicles
Content Type	Text
Resource Type	Article

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Model-Based State-of-Charge Estimation for a Valve-Regulated Lead-Acid Battery

Progress in the Development of Lead-Acid Batteries for Hybrid Electric Vehicles

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