Yuasa YUMICRON YUA00ACC04 Manuel d'utilisateur télécharger pdf (Page 42)

Volt Efficiency The ratio of the

average voltage of a cell or battery

during discharge to the average volt-

age during subsequent recharge.

Voltage The difference in electrical

potential that exists between the ter-

minals of a cell or battery or any two

points of an electrical circuit.

Voltage Range The difference

between maximum and minimum cell

voltages within a battery or string of

cells when all cells are charging and

discharging.

Voltmeter An instrument for mea-

suring voltage.

VRLA (Valve Regulated Lead

Acid) Sealed batteries which fea-

ture a safety valve venting system

designed to release excessive internal

pressure, while maintaining sufficient

pressure for recombination of oxygen

and hydrogen into water.

Watering Adding water to battery

electrolyte to replace loss from elec-

trolysis and evaporation.

Watt A unit of electric power, equal

to a current of one ampere under

one volt of pressure.

Watthour A unit of electrical ener-

gy or work, equal to one watt acting

for one hour.

Watthour Capacity The num-

ber of watthours a storage battery

can deliver under specific conditions

of temperature, rate of discharge

and final voltage.

Watthour Efficiency A storage

battery’s energy efficiency expressed

as ratio of watthour output to the

watthours of the recharge.

Watthour Meter An electric

motor that measures and registers

electrical energy in watthours.

Wet Shelf Life The time a wet sec-

ondary cell can be stored before its

capacity falls to the point that the cell

cannot be easily recharged.

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GLOSSARY

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