Yuasa Battery YUMICRON YUA00ACC05 - Manual (Page 36)

Acid Sulfuric acid, used to describe
the electrolyte or liquid in a cell.
Active Materials Materials in a
battery that react chemically to pro-
duce electrical energy: they are lead
peroxide (positive) and sponge lead
(negative).
Activation Making a dry cell func-
tional by adding electrolyte.
AGM Absorbed glass mat.
Air Oxidized A charged negative
plate that has been removed from
electrolyte and permitted to discharge
in an air atmosphere. Plates must then
be recharged before they are capable
of producing useful electrical energy.
Alloy A combination of two or more
metals. See Antimonial Lead
Alloy
and Calcium Lead Alloy.
Ambient Temperature The sur-
rounding temperature, usually refers to
room temperature.
Alternating Current A pulsating
electric current in which direction of
flow is rapidly changed, so the termi-
nal becomes in rapid succession posi-
tive, then negative. Abbreviated AC.
Ammeter An instrument for measur-
ing electrical current.
Ampacity Current carrying capacity
in amperes.
Ampere The unit of electrical current
equal to the steady state current pro-
duced by one volt applied across a
resistance of one ohm.
Ampere-Hour A measure of the
volume of electricity, being one
ampere for one hour. It is used to
express battery capacity, and is regis-
tered by an ampere-hour meter; it can
be obtained by multiplying the current
in amperes by length of time that the
current is maintained.
Ampere-Hour Capacity The
number of ampere-hours that can be
delivered by a storage battery under
specified conditions as to temperature,
rate of discharge and final voltage.
Ampere-Hour Efficiency The
electrochemical efficiency of a storage
battery expressed as the ratio of
ampere-hours output to the ampere-
hours input required for recharge.
Ampere-Hour Meter An instru-
ment that registers the quantity of elec-
tricity in ampere-hours.
Anode An electrode through which
current enters any non-metallic con-
ductor. Specifically, an electrolytic
anode is an electrode at which nega-
tive ions are discharged, positive ions
are formed, or at which other oxidiz-
ing reactions occur.
Antimonial Lead Alloy A
commonly used alloy in batter y
castings. The percentage of antimo-
ny varies from 1/2% to 12%. Other
substances are present in small quan-
tities, either as inescapable impurities
or by design to improve the proper-
ties of the cast part.
Antimony A hard, brittle, silver-
white metal with a high luster from the
arsenic family.
Assembly 1. Combining various
parts into a finished battery. 2. Any
particular arrangement of cells, con-
nectors and terminals to form a bat-
tery.
Automotive Battery SLI battery of
3 or 6 cells used for starting, lighting
and ignition of cars, trucks, buses, etc.
Average Voltage A storage bat-
tery’s average value of voltage during
a period of charge or discharge.
Battery (Storage) A connected
group of two or more storage cells.
Common usage applies this term to a
single cell used independently.
Bridge The ribbed supporting struc-
ture in the bottom of a battery contain-
er that provides sediment space under
the elements, thereby preventing short
circuits.
Burning Welding together two or
more lead or lead alloy parts such as
plates, straps, connectors.
Burning Center The center-to-cen-
ter distance between adjacent plates of
the same polarity.
Burning Stick A lead or lead alloy
stick used as a supply of joining mater-
ial in lead burning.
Cadmium A metallic element highly
resistant to corrosion, used as a pro-
tective plating on certain parts and fit-
tings.
Cadmium Electrode A third elec-
trode for separate measurements of
the electrode potential of positive and
negative plate groups.
Calcium Lead Alloy A lead base
alloy that is sometimes used for battery
parts in place of antimonial lead
alloys.
Capacity See Ampere Hour
Capacity.
Capacity Test A test that dis-
charges the battery at constant current
at room temperature to a cutoff volt-
age of usually 1.75 volts/cell.
Cast Forming a molten substance
into a shape by introducing the mate-
rial into a mold and allowing it to
solidify.
Casting A metallic item, such as one
or more grids, straps or connectors,
formed by pouring a molten substance
into a mold and allowing it to solidify.
34
GLOSSARY