Page 418 - Lindens Handbook of Batteries

LiTHiUM PriMAry BATTerieS 14.83

Electrolyte Anode cap
in absorbent Anode (Li)
– Separator
Cathode
sleeve
Gasket
+ Cell can
Cathode (CuO)
(a)

Negative terminal

Insulating gasket
Nickel plated steel can
Electrolyte

Copper oxide
cathode

Separator

Shrink + label Lithium anode

Anode current
collector
Bottom insulator
Insulating disk
Positive terminal
(b)
FIGURE 14.83 Lithium/copper oxide batteries (a) Button configuration. (Courtesy of
Panasonic Corp. of North America.) (b) Cylindrical battery, bobbin construction. (Courtesy of
SAFT America, Inc.)

Discharge curves at several different temperatures are shown in Fig. 14.86. The performance of
the battery at temperatures from -40 to 70°C and at various loads is summarized in Fig. 14.87.
The high capacity of the battery at the lighter loads falls off sharply with increasing load and
decreasing temperatures.
The long-term storage capability of these Li/CuO cells is illustrated in Fig. 14.88. Figure 14.88a
shows that there is only a minimum loss of capacity after 10 years of storage at room temperature,
less than 0.5% per year. Performance after storage at high temperatures is plotted in Fig. 14.88b.
The retention of residual capacity in partially discharged cells is said to be equivalent to that of fully
charged cells.