||NAVSO P-3676: Navy Primary and Secondary Batteries
Appendix B. Definitions
accumulator - A rechargeable cell or
stand life - The period of time, at a specified
temperature, that a cell can be stored in the charged condition before its
capacity falls below a specified level.
activation - The process of
making a reserve cell functional by introducing an electrolyte into the
active - Electrochemically active.
active material -
Electrode material which produces electrical current during its chemical
addition agent - Material added to a paste mix in small
amounts for a definite purpose, such as expander ingredients.
alternating current (ac) - Current of alternating
ammeter - An instrument for measuring the magnitude of
ampere - Unit of electric current.
- Unit of battery capacity equal to one ampere for one hour.
The electrode toward which negative ions flow. It is considered the negative in
a primary cell.
antimonial lead - A lead alloy containing antimony used
for casting battery grids and posts.
density - The weight of an
oxide or paste per unit of volume, expressed in terms of grams per unit
aqueous batteries -
Batteries with water-based electrolytes.
back web - Grooved portion of a
sulfate - Chemical part of the expander in negative
lead oxide paste mixes.
bars - Vertical and horizontal grid members which
serve to distribute the current and to lock the active material in
barite - A relatively coarse mineral form of barium
basic lead sulfate - Lead sulfate combined
chemically with lead oxide (PbO) and having the general composition:
- Two or more electric cells connected together and assembled in a unit
Baumé - A scale for indicating the density of a
bipolar plate - An electrode construction where positive and
negative materials are on opposite sides of an electrically conductive
biscuit - See pellet.
Blanc Fixe - Finely divided, precipitated barium
bobbin - A cylindrical electrode
(usually the positive) pressed from a mixture of the active material, a
conductive material, such as carbon black, the electrolyte and/or binder with a
centrally located conductive rod or other means for a current
boost charge - A charge applied to a battery which is already
near a state of full charge, usually of short duration.
bridges - Upward
projection in the lower part of a battery container on which the element
buckling - Warping
of battery plates, usually confined to the positive