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Spin-dependent reserve batteries

The chemistry most commonly employed in spin-dependent liquid-electrolyte reserve batteries has been the lead/fluoboric acid/lead dioxide cell represented by the following simplified reaction ... [Pg.511]

More recently, spin-dependent liquid-electrolyte reserve batteries employing lithium anodes have been developed. The most promising system is that in which thionyl chloride serves in the dual role of electrolyte carrier and active cathodic depolarizer (see Chap. 20). The accepted cell reaction for this system is... [Pg.512]

At one time, the zinc/potassium hydroxide/silver oxide system was also employed in spin-dependent reserve batteries. More frequently, this reserve system has been used in nonspin applications, such as missiles, where the electrolyte is driven into place by a gas generator or other activation method (Chap. 18). This system is again finding favor in some applications where the potential hazards of lithium-based systems can create safety problems. The chemistry of the zinc/silver oxide couple can be represented by either of two reactions, depending on the oxidation state of the silver oxide ... [Pg.512]

Since the individual cells of a spin-dependent liquid-electrolyte reserve battery are generally annular in shape and are filled by centrifugal force, the periphery of the cell must be sealed to keep electrolyte from leaking out. This sealing is typically accomplished by a plastic barrier formed around the outside of the electrode-spacer stack. For lead/fluoboric acid/lead dioxide batteries, this barrier is formed by fish paper (a dense, impervious paper) coated with polyethylene that melts at a relatively low temperature (similar to that used on milk cartons). Cell spacers are punched from the coated fish paper and placed between the electrodes. The stack is then clamped together and heated in an oven at a temperature sufficient to fuse the polyethylene, which then acts as an adhesive and sealer between the electrodes. [Pg.513]

Activation Time. The time from initiation of the battery to the point at which it delivers and sustains a requisite level of voltage across a specified electric load is defined as the activation time. For a spin-dependent liquid-electrolyte reserve battery, this time would include the times for ampoule opening, electrolyte distribution, clearing of electrolyte short circuits in the filling manifold, depassivation of electrodes, and elimination of any form of polarization. Activation times are usually longest at low temperatures, where increased viscosity of the electrolyte and decreased ion mobility are most significant. [Pg.516]

The physical and electrical characteristics of several typical spin-dependent reserve batteries are presented in Table 19.1. [Pg.516]

TABLE 19.1 Typical Spin-Dependent Reserve Batteries... [Pg.517]


See other pages where Spin-dependent reserve batteries is mentioned: [Pg.580]    [Pg.463]    [Pg.510]    [Pg.512]    [Pg.514]    [Pg.516]    [Pg.517]    [Pg.518]    [Pg.580]   
See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.4 , Pg.5 , Pg.6 , Pg.7 , Pg.8 , Pg.9 , Pg.10 , Pg.10 , Pg.11 , Pg.12 , Pg.13 , Pg.14 , Pg.15 , Pg.16 , Pg.17 , Pg.18 , Pg.19 ]




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