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Features of Coin Type Manganese Dioxide Rechargeable Lithium Batteries
Continued Backup Over One Year
The ML2430, for example, offers one year back up under
continuous discharge of 10 A at 23 when the battery is fully
charged or when the battery capacity is the same as the
shipment.
Stable Operating Voltage of 2.5V
Sanyo rechargeable lithium batteries offer a high discharge
voltage of 2.5V, more than twice that of Ni-Cd button cells. So a
single lithium battery can be used to replace two conventional
batteries. They also offer a stable voltage over a long period,
unlike the straight-line voltage drop of capacitors.
Sanyo manganese dioxide rechargeable lithium batteries are high-capacity rechargeable coin-type
batteries. These batteries have a high voltage of 3V compared to Ni-Cd button cells (1.2V). With a low
self-discharge rate and superior charge/discharge cycle characteristics, they have an expected life of
as much as 5 years at room temperature. They are suitable for use as memory backup power sources
and can also be used in combination with solar cells.
Discharge
ML2430
Principles and Structure of Coin Type Manganese Dioxide Rechargeable Lithium Batteries
Manganese Dioxide Rechargeable Lithium Batteries (ML series)
Manganese dioxide, with proven performance, is used as the active material for the positive electrode through Sanyo's developed treatment.
The active material in the negative electrode, lithium aluminum alloy, offers stable cyclic performance with a high discharge voltage.
The electrolyte is made by dissolving lithium salts in a mixed organic solvent.
The charge/discharge reaction of the batteries is as follows:
Anode reaction: (Li AR) AR Li e
Cathode reaction: Mn O2 Li e Mn O2 (Li )
Overall battery reaction: Mn O2 (Li AR) Mn O2 (Li ) AR
The cell voltage is approximately 3V.
Battery Structure
Applications
Memory backup power sources for computer, MD and
portable cellular phones including PHS.
Power source for portable equipment.
Hybrid power source when combined with solar cells
Memory backup power source for electronic equipment.
When the batteries are used with a contact system
Use nickel-plated phosphor bronze or stainless steel for
terminal materials to make contact with the batteries.
For stable contact conditions, several N of contact pressure
are recommended for the contact.
R
Rechargeable Lithium Batteries