8 • 321
Electrical Systems
2004 • LaPalma
1. Physical Condition:
Active material flakes off the plates and fall to the bottom of the cell.
This is normal, but sediment accumulates under the plates and can short out
a cell. The plate separators fail to insulate positive and negative plates in a
cell and the cell becomes shorted, ruining the battery.
2. Insufficient Electrolyte:
This allows exposed portions of the plates to sulfate rapidly. This reduces
the battery’s ability to accept a charge and the battery capacity is reduced.
Accelerated erosion of the lower portions of the plates occur from higher
than normal acid content due to water loss. Only the water evaporates, not
the acid. The battery also has a higher internal resistance when low on water.
Add only distilled water. Fill each cell to the bottom of the vent well when
the battery is warm. Filling a very cold battery with water to the bottom of
the vent well will cause overspill when the battery warms up and the plates
expand. A Battery Formula For Failure: The battery has a higher internal
resistance when low on water, therefore:
high resistance = more heat =
shorter battery life!
3. Sulfation:
When a battery is allowed to remain discharged too long the accumulated
lead sulfate in the plate material solidifies and cannot reenter the electrolyte.
Sulfate in plates is not able to reconstitute the electrolyte to a higher specific
gravity, or to restore the plate material to a more active composition.
4. Overheating:
A battery operated, when the electrolyte temperature reaches 125º F,
increases the chemical reaction. This increases the corrosion of the plates and
reduces the battery life. When overheated the battery plates tend to buckle
and destroy the structural integrity of the battery.
5. Freezing:
When the electrolyte freezes, ice formed dislodges the active material
from the plates. The battery case may crack and the electrolyte will leak out
when thawed. It is especially important to keep a battery at full charge in
cold weather to prevent freezing. The high specific gravity of a fully charged
battery does not freeze as easily. Never attempt to recharge a frozen battery.
Warm it up first.
Seven Reasons
Why Batteries Fail
Содержание LaPalma
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