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Three structural designs of Li/MnO2
cells satisfy the complete range of today’s electronic needs
for small lightweight, portable power sources:
MicroLithium Coin (Button)
Cells
Duracell offers a selection of flat, coin-shaped Li/MnO2
cells for applications requiring small, thin, long-life batteries,
such as memory retention, watches, calculators, remote control units,
medical equipment, electronic games, and many other low current drain
electronic devices.
Figure 4.1.1:
MicroLithium Coin (button) Cell.
High Rate Spiral-Wound Cylindrical
Cells
Spiral wound cylindrical cells are designed for high-current pulse
capability (up to 5 ampere), as well as for continuous high rate operation
(up to 1.2 ampere). The lithium anode and the cathode are wound together
with a microporous polypropylene separator interspaced between thin
electrodes to form a “ jelly roll ” In this way, high surface
area is achieved and rate capability is optimized.
DURACELL high rate spiral-wound
cells are used in a wide range of devices requiring high-current
pulses and/or very low temperature operation. In the new generation
of fully automatic 35mm cameras, for example, DURACELL high rate
batteries operate all camera functions and provide rapid flash recycling
time even at subzero temperatures. DURACELL high rate spiral-wound
cells are also used in computer memory back-up where consumer replaceability
is desired.
Figure 4.2.1:
DURACELL high rate spiral-wound cell
MicroLithium Bobbin-Type Cylindrical
Cells
The increasing demand for extra long shelf life and very high energy
density has inspired the development of Li/MnO2 bobbin
cells. The bobbin-type design maximizes the energy density due to
the use of thick electrodes. However, unlike the spiral-wound cell
design, electrode surface area is very limited. This restricts the
usage of these cell types to very low drain applications. DURACELL
MicroLithium bobbin cells are particularly suited for memory back-up
applications that do not require the availability of replacement
cells in the consumer or industrial market.
Figure 4.3.1:
DURACELL MicroLithium bobbin cell
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