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Construction
There are four structures of Li-ion battery: cylindrical type,
aluminum shell prismatic type,
aluminum round corner prismatic type, and steel shell prismatic
type. The following two Figs
are schematic drawings of the cylindrical and steel shell prismatic
lithium ion batteries.
A. The
interior of the lithium ion battery has a spirally wound construction,
with a finely porous polyethylene film separator sandwiched
in a vortex between sheet-like positive and negative electrodes.
B. The positive electrode employs
a Li-ion collector made of lithium and cobalt metal oxides and
a current collector made of aluminum foil. The electrolyte is
organic solvent with LiPF6 dissolved in it.
C.
The lithium ion battery is also equipped with a safety vent,
which will release pressure under abusive situations. |
Cylindrical Type Construction |
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Prismatic type Construction |
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Ni-MH
Batteries
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