Technical Information RENATA BATERIES U.S.

 

Lithium is one of the lightest alkali metal elements and its standard potential and electrochemical equivalence are the highest of all metals (-3,045 V). When speaking about lithium, this only refers to the anode material (negative pole). The electrolyte and cathode may consist of a wide variety of materials providing very different cell characteristics. The lithium/manganese dioxide and lithium/copper sulfide chemistries manufactured by RENATA are the safest and most reliable lithium battery systems. Contrary to other constructions they are:
- non polluting
- admitted as user-replaceable by Underwriter Laboratories (3V)
- short-circuit proof
and offer the following advantages:
- an additional protective sealing molded on the gasket to protect against humidity
- a nominal voltage of 2V or 3V
- an ideal voltage characteristic which allows perfect detecting of the cell state during the whole lifetime of battery.
- storage temperature -40° to +60°C
- no air transport restrictions
- full capacity in every mounting position (important for portable equipment)
- the best practical volume/capacity ratio
- no maintenance during storage (no recharge etc.)
- ready for use at once even after very long storage periods
Lithium batteries with liquid cathode chemistry such as S0C12, SO2 etc. produced by other manufacturers use corrosive and toxic active materials and can be very dangerous if handled badly. They also lose capacity if not mounted in a correct position, battery state cannot be detected, and voltage breaks down within hours at the end of life.

 

Construction and Chemistry of RENATA Li/MnO2 Batteries (3V)

 

In RENATA batteries a non-aqueous, aprotic organic elec-trolyte containing lithium perchlorate in a mixed organic solvent is used. The active cathode material consists of a specially prepared heat treated mixture of electrolytic MnO2 and other specific components and yields an out-standing volume/capacity ratio for this Li/MnO2 system.

 Manganese dioxide is reduced from the tetravalent to the trivalent state by lithium. The applied separator in RENATA batteries is a double layer system consisting of a non-woven polypropylene cloth with a microporous polypropylene film which gives the best performance regarding mechanical strength, ion per-meability over a wide temperature range (-40 to +100°C) and a low self-discharge rate.
The cell reactions for this system are:
Anode: Li > Li++e
Cathode: MnIVO2+Li++e> MnIIIO2(Li+)
Complete Cell: Li+MnIVO2>MnIIIO2 (Li+)

Knoflíkové baterie
Knoflíkové baterie s vývody
Bateriové moduly
Držáky baterií
Baterie s oxidem stříbra
Baterie měnitelné koncovým uživatelem (seznam typů)