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Title: Energy cell for watch
Claims: What is claimed is: 1. In an energy cell having a positive electrode, a negative electrode and an electrolyte, the improvement comprising: a positive active material of said positive electrode consisting essentially of a mixture of divalent silver oxide and up to 20% by weight of a material from the group including sulfur and silver sulfide whereby the voltage level of the divalent silver oxide is depressed to a predetermined level without affecting the cell capacity, said voltage being maintained over substantially the entire life of the cell. 2. An energy cell in accordance with claim 1 wherein: the percentage of the material mixed with the divalent silver oxide is selected to depress the cell voltage to a range between 1.68 and 1.48 volts. 3. An energy cell in accordance with claim 1 wherein: the mixture of the positive electrode has a predetermined density ranging between 4.0 g/cc and 4.8 g/cc to provide the desired cell performance. 4. An energy cell in accordance with claim 3 wherein: the quantity of the mixture comprising the positive electrode is selected to provide a capacity ranging between 150 and 250 mah. 5. An energy cell in accordance with claim 1 wherein: the material mixed with the divalent silver oxide is uniformly distributed throughout said mixture and the particle size of the divalent silver oxide is slightly reduced during mixing. 6. An energy cell in accordance with claim 1 wherein: the negative electrode comprises a zinc amalgam, and, the cell further includes a microporous membrane material separating the negative electrode and the positive electrode. 7. A button-type energy cell comprising: a bottom can including a top open end, cathode material located in the can-like member comprising a mixture of divalent silver oxide and up to 20% by weight of a material from the group including sulfur and silver sulfide to lower the cell voltage without affecting the capacity of the divalent silver oxide material, a cap to receive the anode material having a downwardly extending skirt portion which is positioned in the opening of the can-like member with the can walls swaged thereover, anode material comprising a zinc compound mounted in said cap, a flexible sealing annular grommet having in a cross section, a flange portion forming a shoulder and an opening extending centrally therethrough, means for adhering the skirt portion to the shoulder of the grommet, and, means for separating the anode material from the cathode material in the cell. 8. A button-type energy cell in accordance with claim 7 wherein: the percentage of the material mixed with the divalent silver oxide is selected to provide a cell voltage of approximately 1.5 volts throughout substantially the entire cell life. Other info: Inventors: Howard, Paul L. (Millington, MD, US) Application Number: 568337 Filing Date: 1975-04-14 Publication_date: 1976-01-27 Assignee: Timex Corporation (Waterbury, CT) Primary Class(es): 429/173 429/174, 429/219, 429/230 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Skapars, Anthony Assistant Examiner: Attorney: |
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