Page 179 - Battery Reference Book

Lithium-iron disulphide primary cells 9/19

Table 9.16 Characteristics of lithium molybdenum disulphide cells
Open Volts Discharge Gravimetric Volumetric Gravimetric
circuit under voltage energy energy power
volts load pro$le density density density
(VI (V) (W mg-') (W h/dm-3) (W kg-' 1

2.4- 1.1 1.85 at C10 Sloping 61 175 130

Volumetric Storage Operation Self Cycle Calendar Types
power temperature temperature discharge life life available
density (" C) ("C) rate
(W ~rn-~)
315 -54 io 55 -30 to 55 5% p/a at 21°C 200 1Oy estimated AA available
bscharge
-10 to 45 charge
-

Table 9.17 Charicteristics of lithium (aluminium) iron monosulphide batteries
-
Open Volts Discharge Gravimetric Volumetric Gravimetric
circuit under voltage energy energy power
density
volts load projle (W w-') density density
07 (VI (W k~ldm-~) (Wkg-')
~~ ~ -
1.3 (LiA1) i.25 Fairly flat 105 (cell basis) 200 (cell basis) 5200 (cell basis)
1.48 (LiSi)

-
~~
Volumetric Storage Operation Self Cycle Calendar Types
power temperature temperature discharge life life available
density ("C) ("C) rate
(W Cm-3)
5400 (cell basis) High temperature 400-500 0.3-3% per 25-1500 Not known Prismatic
cell month developnent cells

Safety in the use of the lithium (aluminium) iron 9.14 Lithium-iron disulphide primary
monosulphide battery is superior to that of other sec- cells
ondary batteries. No special precautions are needed
to remove toiiic or explosive gases as occur, for This cell has an operating load voltage of 1.5V. It
example, in the case of lead-acid or zinc-bromine has been seen as a high capacity cell to outperform
systems. the alkaline manganese dioxide system and also as a
The lithium (aluminium) iron monosulphide sec- cheaper replacement for silver cells.
ondary battery system has been under development The characteristics summarized in Table 9.18 con-
since 1976 and is the design that is now closest to firm the superiority in performance obtained over con-
realization. A 36 V Westinghouse development bat- ventional alkaline manganese and dioxide cells. Thus
tery tested under electric vehicle profiles has given a service life is about doubled, running voltages are
specific energy of 112 W h/kg-l on the basis of cell higher and stay constant over a longer period.
mass and 98 Wh/kg-l on the basis of a battery mod- The performance characteristics of this type of cell
ule including the weight of the thermal management are summarized in Table 9.19.
system. This gave the test vehicle a 100-mile range These cells exhibit a fairly constant voltage dis-
and cyclic life of 120 cycles. charge curve.