Capacity, current drain curves

Typical discharge curves for the SAFT LS210, 3.5 V, 500mAh cell are shown in Figure 56.7. Figure 56.8 shows the capacity-current drain relationship for the same battery. 

Figure 14.20 shows the behavior of AA cells on continuous low-rate discharge at 25°C. The discharge curve is very flat at these low-current drains, but capacity loss below the 2.4 Ah rating occurs below the 1000-hour rate due to parasitic self-discharge. 

The characteristic discharge curves for the thin sealed lead-acid batteries are shown in Fig. 24.28 and the effect of temperature on discharge capacity at various current drains is plotted in Fig. 24.29. These data are summarized in Fig. 24.30, which plots the service hours of a typical battery. The performance can be approximated from this monograph. 

Voltage discharge curves for representative cells and batteries in the Duracell range are shown in Figure 55.3 These curves show the estimated average service life al 2(PC to be expected at varicus current drains on constant-resistance load for various Duracell 1.35 and 1.4 V cells, for cells with nominal capacities in the range 80-85mAh. 

With the larger cells, continuous discharge drains of 1 A and intermittent discharges of 2.5 A are possible. The internal resistance of such cells is low ( 0.1 Q). A typical discharge curve for a high current/high capacity cell is shown in Fig. 3.31. 

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