Constant-power discharging

Fig. 7 Voltage-current profile at constant power discharge of Panasonic cylindrical CGR18650HG Li-ion batteries (standard capacity 1800 mA hr). (From Ref.. ) (View this art in color at www.dekker.com.)...

Discharge curves for a 1380-Ah, OCSM cell, at constant-power discharges of... 

E Rate. The constant power discharge mode is becoming more popular for battery-powered applications. A method, analogous to the C rate, can be used to express the discharge or charge rate in terms of power ... 

The characteristics of the batteries under constant power discharge are shown in Fig. 14.53. These data are expressed in terms of F-rate, which is calculated in a manner similar to caleulating the C rate, but based on the rated Watt-hour capacity. For example, the E 5 rate for a cell rated at 4 Wh is 800 mW. 

Typical discharge curves of the AA-size Li/FeS2 battery under constant-resistance, constant-current, and constant-power discharge modes are shown in Figs. 14.81 to 14.83. 

FIGURE 28.18 Constant-power discharge curves at various E rates for sealed nickel-cadmium batteries at 20°C. 

FIGURE 29.12 Constant-power discharge curves for sealed cylindrical nickel-metal hydride batteries at 20°C. (a) O.IE to IE discharge rate, (b) 1 to 2.5E discharge rate. 

FIGURE 35.38 Constant power discharge of an 18650-type C/LiCoOj battery. The battery was charged in a CCCV regime at 1.65 A to 4.2 V for 2.5 hours at 21°C. (Courtesy of NEC Moli Energy.)... 

TABLE 35.19 Energy Delivered by a 7 Ah INCP 160/61/78 Cell on Constant Power Discharge after Charging to 4.1 V at 1 A at 25°C. (Courtesy of Yardney Technical Products, Inc.)... 

FIGURE 41.13 Specific energy vs constant power discharge level for 13-cm diameter bipolar liAl/FeSj with additive CoSj and 28-wt.% salt in positive electrode — —, and with additive CuFeSj and 32-wL% salt in positive electrode —o—. Each cell was incorporated with 5-wt.% of lil (based on total chemistry weight... 

Constant-Power Discharge Data for 12 V/kF-Range Lead-Carbon HUCs... 

Constant power discharge profiles at varying power loads, (a) AGM and (b) gelled 12 V/kF-range lead-carbon HUCs. 

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