Iec 62877 1 2016

IEC 62877 1 Edition 1 0 201 6 01 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrolyte and water for vented lead acid accumulators – Part 1 Requirements for electrolyte Électrolyte et eau pour accum[.]

Elect roly t e and w ater for v ent ed lead acid accumulators –

Part 1: Requirement s for elect roly te

Élect roly t e et eau pour accumulat eurs plomb- acide ouv ert s –

Partie 1: Ex igences pour l'électroly t e

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Electroly t e and w ater for v ent ed lead acid accumulat ors –

Part 1: R equirement s for elect roly te

Partie 1: Ex igences pour l'électroly t e

CONTENTS

FOREWORD 3

1 Sco e 5

2 Normative ref eren es 5

3 Terms an def i ition 5

4 Pre aration of electrolyte f or le d-acid ac umulators 7

5 Ph sical pro erties of diuted s lfuric acid as electrolyte 7

5.1 De en en e of acid den ity on temp rature 7

5.2 Relation hip of electrolyte den ity on the content of s lf uric acid at 2 °C 8

5.3 Electrolyte den ity comp red to the state of dis harge 8

6 Req irements of s lf uric acid u ed as electrolyte 8

6.1 Impurities of s lfuric acid of hig er con entration degre s 8

6.2 Impurities of f il n acid 8

6.3 Impurities of o eratin electrolyte 9

7 Storage of electrolyte 10 8 Remed in the event of damage d e to electrolyte 10 Bibl ogra h 12 Ta le 1 – Cor ection of den ity f rom me s rin temp rature to referen e/sp cif ied temp rature 7

Ta le 2 – Acid den ity vers s p rcentage of s lph ric acid at 2 °C 8

Ta le 3 – Maximum al owed impurities of di uted s lfuric acid as f il n electrolyte f or le d-acid b t eries in the den ity ran e ≤ 1,3 k /l 9

Ta le 4 – Maximum al owed impurity of di uted acid as o eratin electrolyte

f or le d-acid b t eries in the den ity ran e ≤ 1,3 k /l 10

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th later

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Pu lc tio s

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p te t rig ts IEC s al n t b h ld re p n ible f or id ntifyin a y or al s c p te t rig ts

International Stan ard IEC 6 8 7-1 has b en pre ared by IEC tec nical commite 21:

Secon ary cel s an b t eries

The text of this stan ard is b sed on the fol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b f ou d in the re ort on

votin in icated in the a ove ta le

This publcation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

A l st of al p rts of the IEC 6 8 7 series can b f ou d, u der the general title Electrolyte a d

water for v nted le d a id a c mulators, on the IEC we site

The commit e has decided that the contents of this publcation wi remain u c an ed u ti

the sta i ty date in icated on the IEC we site u der "htp:/we store.iec.c " in the data

related to the sp cifi publ cation At this date, the publ cation wi b

• with rawn,

• re laced by a revised edition, or

ELECTROLYTE AND WATER FOR VENTED

Part 1: Requirements f or electrolyte

This p rt of IEC 6 8 7 a pl es to electrolyte an their comp nents u ed for f il n vented

le d-acid b t eries, f or example dry c arged cel s or b teries, an f or electrolyte re lacement

or electrolyte den ity adju tment of b t eries in o eration This international stan ard def i es

the comp sition, purity an pro erties of electrolyte to b a pl ed where sp cif i in tru tion

f rom the b tery man facturer are not avai a le

The f olowin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le f or its a pl cation For dated ref eren es, only the edition cited a pl es For

u dated ref eren es, the latest edition of the referen ed doc ment (in lu in an

IEC 6 8 7-2, Electrolyte a d water for v nted le d a id a c mulators – P art 2: Re uireme ts

4) f or le d-acid ac umulators

Note 1 to e try: Th ele trolyte is pre are b mixin c n e trate s lf uric a id or s lf uric a id with hig d n ity

of d > 1,3 k /l a d p rif i d water to a hie e th d n ity v lu s s e if i d b th b tery ma ufa turer or s e ifie

in sta d rd relate to th ty e a d b tery d sig in q e tio for a d fin d state of c arg Its p rity me t th

re lacement ( o pin up) of water los in the o eratin electrolyte d e to decomp sition of

water by overc argin an eva oration

Note 1 to e try: Purifie water me t th re uireme ts s e ifie in IEC 6 8 7-2

3.3

f il ng ele trolyte

di uted s lfuric acid to b u ed for the f irst fil n of b teries or f or the re lacement of

contaminated o eratin electrolyte

3.4

f irst fi l ng

original f il n of a b t ery car ied out by the b tery man facturer or the u er in ac ordan e

with the a pl ca le man f acturer’s in tru tion

3.5

operatin ele trolyte

electrolyte present in the b tery folowin the f irst f il n

Note 1 to e try: Th d n ity v lu s a d th d gre of p rity of th o eratin ele trolyte ma d viate fom th

v lu s of th fi in ele trolyte d e to imp rity in ut fom re le is me t b water a d to elutio fom e.g

s p rators, a tiv material a d ele tro e grid

3.6

ele trolyte d nsity

value for the mas p r volume expres ed in k /l

Note 1 to e try: Th d n ity v rie with th b tery´s state of c arg , th ele trolyte v lume v riatio d e to

water lo s a d th temp rature

3.7

spe if ie d nsity

den ity of the b tery to b stated by the b t ery man f acturer val d at the maximum

electrolyte level (se 3.10 ) at ful state of c arge of the b t ery at the ref eren e temp rature

Note 1 to e try: It is relate to th a plc tio a d d sig of th b tery

3.8

ref ere c temperature f or a alytic l re ults

ref eren e temp rature for analytical res lts of electrolyte impurities whic is 2 °C ± 1 °C

Note 1 to e try: De sity v lu s me s re at temp rature d viatin fom this refere c temp rature are a ju te

a c rdin ly

3.9

me s reme t of the ele trolyte de sity

me s rement is car ied out by den imeters, in whic are meters (h drometers) are u ed, or

by electronic devices b sed on e.g on ultrasonic me s rements

Note 1 to e try: Th a c ra y of th in trume t is b ter th n ± 0,0 1 k /l

3.10

ele trolyte le el

p sition of the electrolyte s rface in the cel /b t ery, where the recommen ed tidal

movements are in icated by maximum an minimum electrolyte level mark to as ist in water

re lenis ment

Note 1 to e try: Water re le is me t s o ld ta e pla e in a fuly c arg d state to th u p r lmit, to a oid o er

to pin a d ele trolyte lo s

3.1

value sp cified by the b tery man f acturer f or the in ication of pro erties, s c as the

nominal electrolyte den ity, the maximum electrolyte level an the nominal ca acity of the

b t ery

Note 1 to e try: Th v lu of th n min l temp rature for th in ic tio of p rameters ma difer d p n in o

th b tery ty e a d a plc tio

3.12

ele trolyte a ditiv s

comp u d whic , ad ed to the electrolyte, improve certain pro erties of the ac umulator

Note 1 to e try: Th y s al b s e ifie b th ma uf acturer Oth r a ditiv s, n t s e if i d or n t a pro e b th

b tery ma ufa turer, s o ld n t b u e a th y ma c u e d ma e to th b tery a d th s e d n er th

fu ctio al rela i ty

Note 2 to e try: Ex mple of ele trolyte a ditiv s are alk ln metal s lf ate

3.13

impuritie

impurities f rom the electrolyte in practical u e may cau e damage to the b tery an red ce

its p rf orman e

Note 1 to e try: Th ty e a d ma imum p rmis ible q a tity of imp ritie are s e if i d in Ta le 3 a d 4

4 Pre aration of electrolyte f or lea -acid ac umulators

The electrolyte is pre ared from s lf uric acid of hig con entration by p urin it into purif ied

water

As con entrated an di uted s lfuric acid has a hig ly etc in ef fect on h man s in an

cor osive eff ect on clothes an man materials, an theref ore the electrolyte s al b

pre ared by the b t ery man facturer or s i ed p rson el only

NOT Th mixin of s lp uric a id of hig c n e tratio s with water rele s s a hig amo nt of h at To a oid

s d e s la hin of h t a id, alwa s p ur a id into water, n v r th o p site Pa ate tio to th s fety d ta

s e ts

5 Physical properties of di uted sulf uric acid as electrolyte

5.1 Depe de c of a id de sity on temperature

The value of acid den ities o tained at the me s rin temp rature s al b con erted to the

value of acid den ity at the ref eren e temp rature of 2 °C by f olowin eq ation:

d

n

= d

T+ f

d(T – T

n)

is the referen e temp rature 2 °C

Table 1 – Cor e tion of de sity f rom me s ring temperature

to ref ere c /spe ifie temperature

5.2 Relations ip of ele trolyte d nsity on the conte t of s lf uric a id at 2 °C

The f ol owin Ta le 2 presents the relation hip b twe n the den ity an the content of

s lph ric acid in the electrolyte

Table 2 – Acid de sity v rs s perc nta e of s lphuric a id at 2 °C

Sulfuric a id co tent (H

2

SO

4)

5.3 Ele trolyte de sity compare to th state of dis harg

The electrolyte den ity decre ses d rin dis harge of a b tery Theref ore the sp cif ied

electrolyte den ities relate to a f uly c arged state The p rmis ible l mit values s al b

sp cif ied by the b tery man facturer for the variou b tery typ s an a pl cation

6 Re uirements of sulf uric acid used as electrolyte

6.1 Impuritie of s lf uric a id of higher con e tration d gre s

The purity of s lf uric acid of hig er con entration degre s s al b s c , that af ter the

f ol owin di ution with water to values of ≤ 1,3 k /l as f il n electrolyte, the values given in

Ta le 3 are by no me n ex e ded

6.2 Impuritie of f il ing a id

The s lf uric acid u ed f or f il n le d-acid b t eries s al b cle r an colorles

The impurities in lu ed in the acid s al not ex e d an value q oted in Ta le 3.

This level of purity is req ired also for acid to b u ed a den ity hig er than 1,3 k /l, e.g for

adju tment of the electrolyte den ity in b teries where an electrolyte los has oc ur ed

Table 3 – Ma imum al owe impuritie of di ute s lf uric a id a fi l ng ele trolyte

for le d-a id bat erie in the d nsity ra ge ≤ 1,3 k /l

3 Ars nic (As), Antimo y (Sb), Bismuth (Bi), Tin (Sn), Sele ium ( Se),

Telurium (Te), Ca mium (Cd), Merc ry (Hg),

4

6.3 Impuritie of o erating ele trolyte

The s lf uric acid u ed f or f il n le d-acid b t eries s ould b cle r an colorles

The impurities of the o eratin electrolyte s al not ex e d an value q oted in Ta le 4

Table 4 – Ma imum al owe impurity of di ute a id a operating ele trolyte

for le d-a id bat erie in the d nsity ra ge ≤ 1,3 k /l

3 Ars nic (As), Bismuth (Bi) ,Ca mium (Cd) , Tin ( Sn)

– statio ary c ls with Pla té or flat plate

– statio ary c ls with tu ular plate a d tra tio c ls

– statio ary c ls with Pla té plate

– oth r statio ary c ls

– tra tio c ls a d v nte starter b terie

It is n t p s ible to s e ify v ld lmit v lu s f or metals in g n ral Th le els of imp ritie whic are h rmful

to th b terie d p n stro gly o oth r p rameters a ty e, a e a d o eratin c n itio s of th c l

7 Storage of electrolyte

Electrolyte whic is to b stored s al b placed in ves els whic are a pro riately marked

an resistant to c emical cor osion (e.g p lyeth lene, p lypro ylene or simi ar plastic

materials)

8 Reme y in the ev nt of damage due to electrolyte

Where p rts of s in, eyes or mu ou membranes have b en exp sed to the harmful ef f ect of

the electrolyte, immediate me s res s al b taken in al these cases by careful y rin in out

the af fected p rts with water In ad ition medical care is req ired

Ap l an es, in tal ation an clothes may b cle ned by u in neutral zation agents an by

rin in them out with water

Sodium carb nate (Soda) solution in water with a con entration of 5 % or sol d soda can b

u ed in order to red ce the ef fect of electrolyte on a pl an es, the h man b d an clothes

Diatomace u e rth is esp cial y s ited a sorbin spi ed electrolyte

Bibl ography

IEC 6 4 5-2, Safety req ireme ts for s c ndary b tterie a d b ttery in tallatio s – P art 2:

Statio ary b tteries

IEC 6 4 5-3, Safety req ireme ts for s c ndary b tterie a d b ttery in tallatio s – P art 3:

Tra tio b tteries