The MGB Electric Sports Car

Analysis by Warren Winovich

Page 11



12-Volt lead-acid Gel-Cell

Specifications

nominal voltage12.0 Volts
nominal capacity, 20-hr rate97.6 A-hrs
capacity, 1-hr discharge rate 64.5 A-hrs
dimensions, 1, w, h12 15/16,6 1/4,9 3/8 inches
weight71.7 pounds
stored energy, 20-hr rate1.171 kW-hrs
specific weight, 20-hr rate16.33 W-hrs/lbm


Operation/Charging

Peukert number0.862
Peukert discharge relation1-20 hrs: I x t0.862 = 64.5
voltage @ full charge12.8 Volts
charge voltage14.1 Volts, maximum @69oF
minimum change voltage13.8 Volts


Figure 4. Characteristics of the 12-Volt lead-acid gel-cell type of battery installed in the MGB electric-powered roadster.

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