Estimation of battery charge in photovoltaic systems

Conference · Wed Sep 01 00:00:00 EDT 1982 · Conf. Rec. IEEE Photovoltaic Spec. Conf.; (United States)

OSTI ID:5280823

Appelbaum, J; Weiss, R

The ability to estimate the battery state of charge in an operating system, at any time, is very important from system design point of view. The present study introduces a new on-line method of lead acid battery state of charge determination in a working photovoltaic system. The proposed method is based on the extension of the known open-circuit voltage-charge relation to operating battery voltage-charge relation, combining it with the amperehour accounting method for finite periods of time, and averaging out random measurement errors. The method uses electrical measurement of voltage and current at sampling times. The new method was compared experimentally with charge determination methods for a battery at rest (off line methods) and shows good agreement at the control points. The method was developed and validated experimentally for operating conditions which prevail in autonomous photovoltaic systems.

• Research Organization: University of Colorado, Department of Electrical Engineering, Boulder, Colorado 80309
• OSTI ID: 5280823
• Report Number(s): CONF-820906-
• Journal Information: Conf. Rec. IEEE Photovoltaic Spec. Conf.; (United States), Conference: 16. IEEE photovoltaics specialists conference, San Diego, CA, USA, 28 Sep 1982
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
14 SOLAR ENERGY
BATTERY CHARGING
ON-LINE MEASUREMENT SYSTEMS
LEAD-ACID BATTERIES
PHOTOVOLTAIC POWER SUPPLIES
DESIGN
OPERATION
ACCURACY
CHARGE STATE
MEASURING METHODS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRONIC EQUIPMENT
EQUIPMENT
ON-LINE SYSTEMS
POWER SUPPLIES
SOLAR EQUIPMENT
250900* - Energy Storage- Batteries
140500 - Solar Energy Conversion