Electrically insulating layer of material which physically separates
electrodes of opposite polarity. Separators must be permeable to
ions in the electrolyte, and may also have the function of storing or
immobilizing the electrolyte.
Ratio of the weight of a solution to the weight of an equal volume of
water at a specified temperature. Used as an indicator of the state
of charge of a cell or battery.
A factor used to compensate for battery temperatures other than
77F, which is the standard optimum rating for battery operation. At
temperatures above 77F, more capacity (ampere-hours) can be
obtained from the battery, but battery life is reduced. At
temperatures lower than 77, less capacity can be obtained, but
battery life is extended. Consult IEEE 450 for correction factors.
External electric connections of a cell or battery, also referred to as
"terminal post" or "post."
Process in which a cell undergoes an uncontrolled rise in
temperature due to the passage of increasing current (on short
circuit discharge or constant-voltage charging and equalization).
Chances of thermal runaway occurring can be reduced by utilizing a
temperature-compensated charger with the battery system. If
uncorrected, this condition can sometimes lead to fire and/or
Uninterruptible power supply; a system designed to automatically
provide power when "normal" utility line power is lost, without delay
END OF APPENDIX C
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