Cells and Batteries

download report

Transcript Cells and Batteries

Cells and Batteries
A cell is a unit which includes
two electrodes and one
electrolyte.

In your fruit battery the electrodes were
the metal strips and the electrolyte was
the juice in the fruit.

When two or more cells are connected
together, the combination is called a cell.


Dry cells are
connected in series
to obtain a larger
amount of energy and
a higher electric
potential (voltage).
Batteries are made of
a serious of cells. A 9
volt, has 6 cells that
produced 1.5V each
(1.5V x 6 cells = 9V).


When dry cells are
connected in series,
the electric potential
(voltage) increases by
1.5V each time a new
cell is added to the
set of dry cells.
The amount of
energy in the battery
increases each time
a new dry cell is
added.
Electrochemical Cells
Primary
- Single use
Secondary
- Multiple use
- Can be discharged but - Can be discharged and
not recharged
recharged
- Only one chemical
reaction
- 2 chemical processes;
one to discharge, one to
recharge
List advantages and disadvantages of each
Primary
Secondary
Advantage:
Advantage:
- Has only one chemical reaction
- Can be used multiple times
Disadvantage:
Disadvantage:
- Can only be used once
- Has 2 chemical processes