Glossary - Teledyne 7639-27 Maintenance Manual

Active material The formed (charged) material on the positive and negative electrodes
(plates).
AGM Absorptive Glass Mat, a non-woven fiberglass separator that holds the
electrolyte.
Ah Ampere-hour; the standard designation of capacity units for batteries.
CFR Code of Federal Regulations.
Electrolyte The liquid added to a battery that is capable of conducting ions between
the two electrodes.
Electrolysis Decomposition of an electrolyte by the action of an electric current
flowing through the electrodes (positive and negative plates).
IATA International Air Transport Association.
ICAO International Civil Aviation Organization.
IEC International Electrotechnical Commission.
I Peak current delivered at 0.3 seconds into a 15 second controlled
pp
discharge at a constant terminal voltage of half the nominal battery
voltage.
I Discharge current at the conclusion of a 15 second controlled discharge
pr
at a constant terminal voltage of half the nominal battery voltage
Nonspillable Refers to the ability of the battery to retain the electrolyte when subjected
to tests identified under US DOT Reg 49 CFR, Part 173.159, paragraph
"d".
OCV Open Circuit Voltage; measured with no loads connected to the battery.
Passivation Refers to the oxidation of the negative electrode.
Recombination The process by which oxygen combines (reacts) with the negative active
material.
Sponge lead Fully charged negative plates convert to a very porous pure lead material,
often referred as sponge lead since it resembles a sponge under high
magnification.
Sulfation The product of discharge, lead sulfate, formed on both positive and
negative plates.
Venting Means for a battery to release the gases it generates during charging.
VRLA Valve-Regulated Lead-Acid
Q01-4000
COMPONENT MAINTENANCE MANUAL

11. GLOSSARY

Rev G Page 22 of 28 Teledyne Battery Products