Page 422 - Battery Reference Book

Lithium (aluminium)-iron sulphide secondary cells 3819
38.13 Lithium-molybdenum 38.14 Lithium (aluminium)-iron
disulphide secondary cells sulphide secondary cells
Rechargeable lithium-molybdenum disulphide cells in This battery is seen as a possible contender in the elec-
AA sizes (600--800mAh) are available from Moli tric vehicle market. Eagle Picher, Gould and Argonne
Energy Ltd; mudti cell (4 and 8 cell) batteries are National Laboratory are involved in these develop-
also available. lintended applications of these cells, ments. Of various samples studies the lithium (alu-
which are at present being produced in relatively small minium)-iron monosulphide (LiAL-FeS) secondary
numbers (0.6 million per annum compared with about system is the closest to commercial realization.
300 million per annum for sealed nickel cadmium), are Earlier in its development this battery was consid-
those for which small sealed nickel batteries are cur- ered as a candidate for utility off-peak load level-
rently used. Rechargeable lithium-molybdenum disul- ling. However, nowadays it is mostly being considered
phide cells are claimed to have several advantages for traction applications for electric vehicles, includ-
over sealed nickel cadmium cells including a 40 ing vans, forklift trucks, aircraft towing vehicles and
to 50% higher voltage per cell, higher energy den- underground mining vehicles.
sity (30-100%)1, higher charge retention (5% per Westinghouse are developing a lithium (alu-
annum compared to 120 to 300% per annum for minium)-iron sulphide 36 V electric vehicle battery
sealed nickel-cadmium) and absence of voltage delay which has a specific energy of 112WNkg-' on the
effects. basis of cell mass and 98Whkg-' on the basis of
Applications include those where the cells are used battery module weight including a heat dissipating sys-
infrequently or irregularly and include applications in tem. This gives the battery a 100-mile range under
portable cellular telephones, lap top computers and standard electric vehicle test profiles. The battery has
portable data terminals. a cyclic life of 120 cycles.