Advertisement
Manganese Dioxide Primary Lithium Batteries (CR series)
Sanyo manganese dioxide primary lithium batteries, developed in 1976, feature high energy density.
Because they offer many unique features not found in either convetional dry cells or silver oxide
batteries, Sanyo lithium batteries are currently used in a wide range of equipment such as electronic
calculators, watches and cameras. In addition, they are used as a memory backup power source in
microcomputer-controlled devices. By offering a wide range of lithium batteries, from coin cells to
high-power cylindrical type cells (spiral structure) and high-capacity cylindrical type cells (bobbin
structure), Sanyo has been able to meet the demands of a large and diversified market.
Sanyo is acquiring International Regulation ISO9001 approval which is a quality guarantee. Sanyo
continues to implement thorough quality control.
〔 Principles and Structure of Primary Lithium Batteries 〕
Applying an original manufacturing process, Sanyo uses a manganese dioxide compound as the active material for the positive electrode
(cathode). Lithium is used for the negative electrode (anode) to produce a cell with high voltage and high energy density. In addition, an
organic electrolyte is employed to which lithium salts are added.
The discharge reaction of lithium batteries is as follows:
The cell voltage is approximately 3V.
■ Battery Structure
High-power cylindrical type lithium batteries are capable of
producing a very high discharge current due to their spiral electrode
structure. High-capacity cylindrical type lithium batteries have a
bobbin structure which contains active material and can provide a
high capacity.
In addition, the laser sealing technology ensures long-term
reliability and a battery life of up to 10 years at room temperature.
Cylindrical Type Primary Lithium Batteries
Crimp-sealing
positive cap with safety vent
negative tab
5
Anode reaction: Li→Li
●
Cathode reaction: Mn
●
Overall battery reaction: Mn
●
High-power (spiral structure)
negative cap
PTC device
gasket
positive tab
anode (lithium)
separator＋electrolyte
cathode (MnO
)
2
insulator plate
negative can
＋
＋e
−
Ⅳ
O
＋Li
＋e
→Mn
＋
−
2
Ⅳ
＋Li→Mn
O
2
Coin Type Primary Lithium Batteries (crimp-sealing)
negative cap
Laser-sealing
gasket
laser-sealed section
positive tab
negative tab
cathode (MnO
)
2
separator＋electrolyte
anode (lithium)
insulator sheet
positive can with safety vent
Ⅲ
O
(Li
)
＋
2
Ⅲ
O
(Li
＋
)
2
anode (lithium)
separator＋electrolyte
gasket
cathode (MnO
positive can
High-capacity (bobbin structure)
Laser-sealing
negative cap
laser-sealed section
negative current collector
cathode (MnO
separator＋electrolyte
anode (lithium)
positive can
)
2
gasket
)
2
Advertisement
