Yuasa-battery YUMICRON YUA00ACC05 User Manual download pdf (Page 41)

Short Circuit Current The current

that flows when the two terminals of a

cell or battery are inadvertently con-

nected to each other.

Side Terminal SLI battery design

with two through-the-container current

connections on one side instead of two

posts on top.

SLI Battery A battery for automotive

use in starting, lighting and ignition.

Sliver, Slyver Extremely fine paral-

lel glass fibers used in retainers next to

positive plates to retard shedding.

Smelting The primary process for

recovering lead and antimony from

scrapped batteries and scrap from bat-

tery manufacture.

Soaking A manufacturing process

following pasting that soaks certain

types of lead plates in sulfuric acid.

This provides a protective surface and

also sulfate helpful in container and

tank formation.

Soda Ash Sodium Carbonate

(Na

) used in neutralizing sulfuric

acid in spills or effluents.

Spalling Shedding of active material,

usually from positives, during formation

due to incomplete or improper plate

curing.

Sponge Lead (Pb) A porous mass

of lead crystals and the chief material

of a full-charged negative plate.

Stacking A cell assembly operation,

alternately piling plates and separators

in a burning box prior to attachment of

straps and posts.

Standard Battery Any of

Conventional, YuMicron or YuMicron CX

batteries consisting of flooded elec-

trolyte and cell accessible construction.

Standing Loss Loss of charge by an

idle cell or battery, resulting from local

action.

Starting Rate A beginning charg-

ing rate that does not produce gassing

or temperatures in excess of 110°F.

State of Charge The amount of

electrochemical energy left in a cell or

battery.

Strap Precast or cast-on piece of

lead or lead alloy used to connect

plates into groups and to connect

groups to the post.

Strap Center Spacing between cen-

ters of adjacent plates in a group.

Stratification Layering of high spe-

cific gravity electrolyte in lower por-

tions of a cell, where it does not circu-

late normally and is of no use.

Sulfated A plate or cell whose

active materials contain an apprecia-

ble amount of lead sulfate.

Sulfation Formation of lead sulfate

on a plate or cell as a result of dis-

charge, self-discharge or pickling.

Sulfuric Acid (H

) The princi-

pal acid compound of sulfur, sulfuric

acid in dilute and highly pure form is

the electrolyte of lead acid storage

cells.

Tack Burn A shallow burn used to

tack together two lead parts.

Tank Formation Electrolytic pro-

cessing of plates prior to assembly in

large tanks of acid.

Temperature Correction In stor-

age cells, specific gravity and charg-

ing voltage vary inversely with temper-

ature, while the open circuit voltage

varies directly though slightly with tem-

perature.

Terminals The points on a battery to

which the external circuit is connected.

Terminal Cable A length of insulat-

ed cable, one end connected to the

battery terminal post, and the other fit-

ted with a plug, receptacle, lug or

other device for connection to an

external circuit.

Top Pour A method of casting in

which molten metal is poured, usual-

ly by hand, into a top gated mold.

Treeing Growth of a lead dendrite or

filament through a crack or hole of a

separator, short-circuiting the cell.

Trickle Charge A low-rate contin-

uous charge approximately equal to

a battery’s internal losses and capa-

ble of maintaining the battery in a

fully-charged state.

TVR A temperature compensating

voltage relay used in charging

equipment.

Unformed A plate that has not

been electrolytically formed.

Useful Acid The acid above the

lower edges of the plates that takes

part in the discharge reactions that

occur within a cell.

Vent An opening that permits the

escape of gas from a cell or mold.

Vent Plug The seal for the vent

and filling well of a cell cover, con-

taining a small hole for escape of

gas.

Vent Well The hole or holes in a

cell cover that allow fluids to be

checked, electrolyte to be added,

and gas to escape. The vent plug fits

into the vent well.

Verticals The members in a plate

grid.

Volt The unit of measurement of

electromotive force, being the force

needed to send a current or one

ampere through a conductor with a

resistance of one ohm.

GLOSSARY

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Yuasa-battery YUMICRON YUA00ACC05 User Manual Page 41

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