ENGINEERING EVALUATION OF THE ZING-MERCURIC OXIDE BATTERY/NICKEL-CADMIUM BATTERY HYBRID SYSTEM

摘要

Appreciable improvements in the operating characteristics of the zinc mercuric oxide (Zn/HgO) primary battery were obtained at +20F on communication (transmit/receive) type loads by using it in parallel with a nickel cadmium (NiCd) secondary battery. However, at 70F, the Zn/HgO battery-NiCd battery hybrid system failed to provide as much capacity as the Zn/HgO battery alone because of overcharge during the receive portion of the discharge. Data are presented to show the influence on capacity of duty cycle (1 minute/9 minutes versus 1 minute/4 minutes), charge current controls during the discharge (50 ohms versus 90 ohms), and discharge loads (70 ohms/1400 ohms and 140 ohms/2800 ohms). Overcharge during pre-charge of the NiCd battery by the Zn/HgO battery prior to test can have a significant effect on the final capacity obtained.