Transcript Batteries

Batteries
Components that store energy and supply it
to electrons to be carried round a circuit
This is a cell.
What most people think of as a battery is actually a
single cell where chemical energy is stored ready to
be converted into electrical energy
This is a battery.
Where 2 or more cells are combined to increase the
voltage or current of the supply.
Batteries (and cells) are POLARISED which means
current only flows through them in one direction Positive +
(positive to negative)
Therefore you need to know how to identify Positive
and negative on the symbol and physical cells.
Negative -
ALL Batteries are toxic and
MUST be disposed of properly.
This Icon means …
DO NOT BIN
Instead batteries must be
re-cycled or taken to
specialist disposal
facilities.
The “Battery Directive” states
that batteries must not contain
Mercury or Cadmium. Because
these are TOXIC (harmful to the
environment.)
That means…
That the Nickel Cadmium
rechargeable batteries shown
above are being PHASED OUT
Instead, nearly all rechargeable
batteries are Either:
·Nickel-metal Hydride (NiMH)
which is less harmful and last
longer Or ·Lihium-Ion (Li-Ion)
which last LOTS longer but is
MUCH more expensive.
Throwing away batteries is a
waste of energy that could be
recovered in terms of materials
and chemicals
Batteries
contain TOXIC
chemicals and
Acids which can
pollute the
environment
Problems
Batteries
& the
environment
Reduce
• Choosing
products that
don’t require
batteries
• Using mains
power when
possible
What
Can be
done?
Re-use
• Using rechargeable
batteries instead of
disposable
If put in a
normal bin,
batteries end
up on landfill
where the
casings rust
and poisonous
gases pollute
the
environment
and acids
pollute the
groundwater
Recycle
• Putting
batteries in
dedicated
battery bins
• Chemicals can
be processed
professionally
and safely