HOME ABOUT US PRODUCTS APPLICATIONS SPONTANEOUS ELECTROLYSIS NEWS QUALITY CONTACT US Technology The silver zinc technology has been in usage in a variety of applications since the 1940’s, with continuing improvements in its wet life, cycle life and performance. The overall cell reaction is as follows: The silver zinc couple offers many enviable attributes unmatched by other electrochemistries: Advantages include Excellent Energy Density Excellent Power Density Excellent Charge Retention Excellent Electrochemical Efficiency Excellent Low Temperature Performance High Discharge Rate Capability (up to 1 A/in2) Excellent Safety Record (benign failure) The silver zinc electrochemistry is capable of up to 25 months and 100 cycles (100%DOD), depending upon the design and application. The open circuit voltage of a fully charged silver zinc cell is 1.86 vdc. For a partially discharged cell, the open circuit voltage is 1.60 vdc. Under load, the silver zinc electrochemistry is known for its flat discharge profile. A comparison of the various plateau voltages at various “C” discharge rates is shown as follows: How does the silver zinc rechargeable battery compare to other rechargeable chemistries? In the table below are shown the various energy densities of popular battery types today: Chemistry Gravimetric (Wh/kg) Volumetric (Wh/l) Pb-Acid 30-45 60-100 Ni-Cd 40-65 70-100 Ni-H2 40-60 70-90 Ni-MH 60-80 100-140 Li-Ion 115-180 250-360 Ag-Zn 140-200 400-510 Relative to handling and usage, there are several factors which can either increase of decrease the useful life of a silver zinc battery. These are described below: What factors increases life? These include: Moderate Temperature Operation Low Temperature Storage < 40 ºF Full Charge Cut-off at Recommended Voltage Low Rate Charge Regular Maintenance Those factors which can decrease life include: High Temperature Operation High Temperature Storage > 125 ºF Overcharge Cell Reversal (overdischarge) (All of the above can be controlled by proper maintenance). Home | About Us | Products | Applications | News | Quality | Contact Us | 860-564-4078 | Send Us Email