Optimization of BA-4270/U and BA-4386/PRC-25 Magnesium MnO2 Primary Batteries.
Abstract
The BA-4270/U and BA-4386/PRC-25 magnesium-MnO2 primary battery designs including cell design and cathode mix formulation, were optimized for power per unit weight, high temperature storageability, simplicity of design, and the mechanism for connecting cells. The BA-4270/U battery complement was reduced from 99 to 59 cells retaining the 40 hour output, while the BA-4386/PRC-25 battery complement was reduced from 64 to 18 cells with an increase in service going from 60 hours to 70 hours. The MnO2 efficiency and voltage level of this system increase with temperature of discharge; therefore, the power density varies directly with temperature so that at 130F, output of one cathode mix formulation, for example, was 62 WH/lb. of cell compared to 44 WH/lb. at 70F and 16 WH/lb. at 10F. A palm oil coating is apparently unnecessary with the evolved cell designs, since it had no significant effect. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1969
- Accession Number
- AD0850003
Entities
People
- L. F. Urry