IEC 60095-6:2019

Lead-acid starter batteries - Part 6: Batteries for micro-cycle applications

IEC 60095-6:2019 is applicable to lead-acid batteries with a nominal voltage of 12 V, used primarily as power source for the starting of internal combustion engines (ICE), lighting and also for auxiliary equipment of ICE vehicles. These batteries are commonly called "starter batteries".
The batteries within the scope of this document are used for micro-cycle applications in vehicles which can also be called start-stop (or stop-start, idling-stop system, micro-hybrid or idle-stop-and-go) applications. In cars with this special capability, the internal combustion engine is switched off during a complete vehicle stop, during idling with low speed or during idling where there is no need to support the vehicle movement by the internal combustion engine. During the phases in which the engine is switched off, most of the electric and electronic components of the car are supplied by the battery without support of the alternator. In addition, in most cases an additional regenerative braking (recuperation or regeneration of braking energy) function is installed. The batteries under these applications are stressed in a completely different way compared to classical starter batteries. Aside from these additional properties, these batteries need to crank the ICE and support the lighting and also auxiliary functions in a standard operating mode with the support of the alternator when the internal combustion engine is switched on. All batteries within this scope fulfil basic functions, which are tested under the application of IEC 60095-1.
This document specifies the general requirements and methods of test specific to lead-acid batteries used for micro-cycle applications.
This document is applicable to batteries for the following purposes:
• lead-acid batteries of the dimensions according to IEC 60095­2 for vehicles with the capability to automatically switch off the ICE during vehicle operation either in standstill or when moving ("start-stop");
• lead-acid batteries of the dimensions according to IEC 60095­2 for vehicles with start­stop applications with the capability to recover braking energy or energy from other sources.
Li-ion technology is excluded from this document.

Batteries d'accumulateurs de démarrage au plomb - Partie 6: Batteries pour applications microcycles

L'IEC 60095-6:2019 est applicable aux batteries d'accumulateurs au plomb d'une tension nominale de 12 V utilisées principalement comme sources d'alimentation pour le démarrage des moteurs à combustion interne, ainsi que pour l'éclairage et les installations auxiliaires des véhicules équipés de moteur à combustion interne. Dans le langage courant, ce type de batteries est appelé "batterie de démarrage".
Les batteries relevant du domaine d'application du présent document sont utilisées sur des véhicules "microhybridés" intégrant un système de type start-stop et/ou un système de récupération d'énergie dans lesquels la batterie est soumise à des sollicitations de type "microcyclage". Sur les automobiles possédant cette capacité spéciale, le moteur à combustion interne est coupé à l'arrêt complet du véhicule, au ralenti à faible vitesse ou au ralenti lorsqu'il n'est pas nécessaire que le moteur à combustion interne assure le déplacement du véhicule. Lors des phases au cours desquelles le moteur est coupé, la plupart des composants électriques et électroniques de l'automobile sont alimentés par la batterie sans le soutien de l'alternateur. De plus, dans la plupart des cas, une fonction supplémentaire de freinage par récupération (récupération ou régénération de l'énergie de freinage) est installée. Dans ces applications, les batteries sont soumises à des contraintes tout à fait différentes de celles qui s'exercent sur les batteries de démarrage de type classique. Outre ces propriétés supplémentaires, il y a lieu que ces batteries assurent le démarrage du moteur à combustion interne et l'éclairage, ainsi que des fonctions auxiliaires selon un mode de fonctionnement classique avec le soutien de l'alternateur quand le moteur à combustion interne est en marche. Toutes les batteries relevant de ce domaine d'application assurent des fonctions de base qui sont soumises à l'essai en application de l'IEC 60095-1.
Le présent document spécifie les exigences générales et les méthodes d'essai spécifiques aux batteries au plomb utilisées pour les applications microcycles.
Les applications de ces batteries sont les suivantes:
• batteries au plomb de dimensions conformes à l'IEC 60095­2 pour les véhicules capables de couper automatiquement le moteur à combustion interne pendant le fonctionnement du véhicule, qu'il soit immobile ou en mouvement ("start-stop");
• batteries au plomb de dimensions conformes à l'IEC 60095­2 pour les véhicules destinés aux applications start-stop et capables de récupérer l'énergie de freinage ou l'énergie provenant d'autres sources.
La technologie lithium-ion ne relève pas du domaine d'application du présent document.

General Information

• Status: Published
• Publication Date: 11-Sep-2019
• ICS: 29.220.20 - Acid secondary cells and batteries
• Technical Committee: TC 21 - Secondary cells and batteries
• Drafting Committee: WG 2 - TC 21/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 12-Sep-2019
• Completion Date: 04-Oct-2019

Standards Content (Sample)

IEC 60095-6 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Lead-acid starter batteries –
Part 6: Batteries for micro-cycle applications

Batteries d'accumulateurs de démarrage au plomb –
Partie 6: Batteries pour applications microcycles

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IEC 60095-6 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Lead-acid starter batteries –
Part 6: Batteries for micro-cycle applications

Batteries d'accumulateurs de démarrage au plomb –

Partie 6: Batteries pour applications microcycles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-7366-1

– 2 – IEC 60095-6:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms and symbols . 7
4 Designation of batteries for micro-cycle applications – Electrolyte density and
open circuit voltage . 8
4.1 Designation according to type . 8
4.2 Electrolyte density and open circuit voltage. 8
5 Condition on delivery . 8
6 General requirements . 9
6.1 Identification, labelling . 9
6.1.1 General . 9
6.1.2 The identification of manufacturer or supplier . 9
6.1.3 Nominal voltage: 12 V . 9
6.1.4 Capacity or reserve capacity and nominal cranking current . 9
6.1.5 Production date code . 9
6.1.6 Safety labelling . 9
6.1.7 Recycling labelling . 9
6.1.8 Identification of start and stop . 9
6.1.9 Valve-regulated batteries . 9
6.2 Marking of the polarity . 9
6.3 Fastening of the battery . 10
7 Functional characteristics . 10
7.1 Electrical characteristics . 10
7.2 Mechanical characteristics . 11
8 General test conditions . 11
8.1 Sampling of batteries . 11
8.2 Charging method – Definition of a fully charged battery . 11
8.3 Test equipment . 11
8.3.1 Measuring instruments. 11
8.3.2 Water bath . 11
8.3.3 Environmental chamber . 11
8.4 Test sequence . 11
9 Tests methods . 13
9.1 20 h capacity check C . 13
e
9.2 Reserve capacity check RC . 13
e
9.3 Cranking performance test . 13
9.3.1 Cranking performance test – Standard temperature (−18 °C) . 13
9.3.2 Cranking performance test – Very cold climates . 14
9.4 Charge acceptance tests . 14
9.4.1 Charge acceptance 1 (at 0 °C) . 14
9.4.2 Specific charge acceptance tests for batteries for micro-cycle
applications (at 25 °C) . 14
9.5 Charge retention test . 19

9.6 Endurance test for batteries . 19
9.6.1 Corrosion test . 19
9.6.2 Cycling test 50 % DoD . 19
9.6.3 Cycling test 17,5 % DoD . 19
9.6.4 Micro-cycles test, start and stop cycle endurance test . 20
9.7 Vibration resistance test . 23
9.8 Electrolyte retention test . 23
10 Requirements . 23
Annex A (normative) Specific requirements for measuring equipment capability . 26
A.1 Equipment requirements for the dynamic charge acceptance test DCA (see
9.4.2, OPTION B) . 26
A.2 Equipment requirements for the micro-hybrid test MHT (see 9.6.4,
OPTION B) . 26
Annex B (normative) Flow chart of DCA test procedure . 27
Bibliography . 31

Figure 1 – Sub-phases of the DCR part: 90 s drive phases (steps 45 to 51) . 19
ss
Figure B.1 – DCA = DCA pulse profile . 27
pp
Figure B.2 – DCR = DCA real world simulation with stop/start . 28
ss
Figure B.3 – Trip first part . 29
Figure B.4 – Trip second part . 30

Table 1 – Test/battery OPTION A . 12
Table 2 – Test/battery OPTION B . 13
Table 3 – DCA – Pre-cycling . 15
Table 4 – DCA – Charge acceptance qDCA procedure . 16
Table 5 – DCA – DCA procedure . 16
pp
Table 6 – DCA – DCR part . 18
ss
Table 7 – Endurance 17,5 % DoD – Cycling units . 20
Table 8 – Battery preparation . 21
Table 9 – Micro-cycle . 22
Table 10 – Check-up after cycling . 22
Table 11 – Data evaluation . 23
Table 12 – Summary of requirements OPTION A . 24
Table 13 – Summary of requirements OPTION B . 25
Table A.1 – Equipment requirements . 26
Table A.2 – Equipment requirements . 26

– 4 – IEC 60095-6:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LEAD-ACID STARTER BATTERIES –
Part 6: Batteries for micro-cycle applications

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60095-6 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1013/FDIS 21/1018/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60095 series, published under the general title Lead-acid starter
batteries, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 60095-6:2019 © IEC 2019
LEAD-ACID STARTER BATTERIES –
Part 6: Batteries for micro-cycle applications

1 Scope
This part of IEC 60095 is applicable to lead-acid batteries with a nominal voltage of 12 V,
used primarily as power source for the starting of internal combustion engines (ICE), lighting
and also for auxiliary equipment of ICE vehicles. These batteries are commonly called "starter
batteries".
The batteries within the scope of this document are used for micro-cycle applications in
vehicles which can also be called start-stop (or stop-start, idling-stop system, micro-hybrid or
idle-stop-and-go) applications. In cars with this special capability, the internal combustion
engine is switched off during a complete vehicle stop, during idling with low speed or during
idling where there is no need to support the vehicle movement by the internal combustion
engine. During the phases in which the engine is switched off, most of the electric and
electronic components of the car are supplied by the battery without support of the alternator.
In addition, in most cases an additional regenerative braking (recuperation or regeneration of
braking energy) function is installed. The batteries under these applications are stressed in a
completely different way compared to classical starter batteries. Aside from these additional
properties, these batteries need to crank the ICE and support the lighting and also auxiliary
functions in a standard operating mode with the support of the alternator when the internal
combustion engine is switched on. All batteries within this scope fulfil basic functions, which
are tested under the application of IEC 60095-1.
This document specifies the general requirements and methods of test specific to lead-acid
batteries used for micro-cycle applications.
This document is applicable to batteries for the following purposes:
• lead-acid batteries of the dimensions according to IEC 60095-2 for vehicles with the
capability to automatically switch off the ICE during vehicle operation either in standstill or
when moving ("start-stop");
• lead-acid batteries of the dimensions according to IEC 60095-2 for vehicles with start-stop
applications with the capability to recover braking energy or energy from other sources.
Li-ion technology is excluded from this document.
NOTE The applicability of this document also for batteries according to IEC 60095-4 is under consideration.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60050-482, International Electrotechnical Vocabulary (IEV) – Part 482: Primary and
secondary cells and batteries
IEC 60095-1:2018, Lead-acid starter batteries – Part 1: General requirements and methods of
test
IEC 60095-2, Lead-acid starter batteries – Part 2: Dimensions of batteries and dimensions
and marking of terminals
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-482 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
flooded battery
vented battery
lead-acid battery having a cover provided with one or more openings through which gaseous
products may escape
3.1.2
enhanced flooded battery
EFB battery
flooded lead-acid battery with additional special design features to significantly improve the
cycling capability compared to standard flooded batteries
Note 1 to entry: This note applies to the French language only.
3.1.3
valve regulated lead-acid battery
VRLA battery
lead-acid battery which is closed under normal conditions but which has an arrangement that
allows the escape of gas if the internal pressure exceeds a predetermined value
Note 1 to entry: The VRLA battery cannot receive addition to the electrolyte and after activation of dry-charged
VRLA.
Note 2 to entry: In VRLA batteries the electrolyte is immobilized.
Note 3 to entry: This note applies to the French language only.
3.1.4
absorbent glass mat battery
AGM battery
VRLA battery in which the electrolyte is immobilized by absorption in a glass mat
Note 1 to entry: This note applies to the French language only.
3.1.5
gel battery
VRLA battery in which the electrolyte is immobilized by fixing as a gel
3.2 Abbreviated terms and symbols
EN European Standard (Euro Norm) created by CENELEC (European Committee for
Electrotechnical Standardization)
SBA Standard Battery Association created by Battery Association of Japan
CHA Charge Battery; to be charged with given parameters

– 8 – IEC 60095-6:2019 © IEC 2019
DCA Dynamic charge acceptance
DCH Discharge Battery; to be discharged with given parameters
PAU Pause; no charging or discharging but measurement of voltage as required. If the
battery is connected to the test unit, there shall be no quiescent current
RPT Repeat; instruction to repeat certain steps several times
CAS Case of; decision point leading to different actions dependent on the value of the
reference variable
Effective capacity [Ah]
C
e
C Nominal capacity [Ah]
n
C Recharged capacity [Ah]
rch
DoD Depth of discharge [% of C ]
n
EOS End of step
I Charge current [A]
CHA
I Discharge current for cranking [A]
CC
I Weighted normalized dynamic charge acceptance, measured in A per Ah nominal
DCA
capacity C [A/Ah]
n
I Discharge current [A]
DCH
I Average charge current in DCA test after charge history [A]
c
I Average charge current in DCA test after discharge history [A]
d
I Nominal discharge current [A], I [A] = C [Ah] / 20 [h]
n n n
I Average charge current in DCA test during regenerative braking [A]
r
Q Charged capacity [Ah]
CHA
Q Discharged capacity [Ah]
DCH
R Calculated dynamic internal resistance [Ω]
dyn
R Internal resistance [Ω]
i
RC Reserve capacity (discharge with a fixed current of 25 A to U = 10,5 V), used in DCA
test
SoC State of charge
t Discharge time [s]
DCH
U Charging voltage [V]
c
4 Designation of batteries for micro-cycle applications – Electrolyte density
and open circuit voltage
4.1 Designation according to type
Subclause 4.1 of IEC 60095-1:2018 is applicable.
4.2 Electrolyte density and open circuit voltage
Subclause 4.3 of IEC 60095-1:2018 is applicable.
5 Condition on delivery
Clause 5 of IEC 60095-1:2018 is applicable.

6 General requirements
6.1 Identification, labelling
6.1.1 General
Batteries according to this document shall bear the following characteristics on at least the
top or one of their four sides.
6.1.2 The identification of manufacturer or supplier
The name of the manufacturer or supplier shall be indicated.
6.1.3 Nominal voltage: 12 V
The nominal voltage of 12 V shall be indicated.
6.1.4 Capacity or reserve capacity and nominal cranking current
Subclause 6.1.4 of IEC 60095-1:2018 is applicable.
6.1.5 Production date code
Batteries shall be marked with the date of production. This might be part of a more complex
code.
6.1.6 Safety labelling
Subclause 6.1.6 of IEC 60095-1:2018 is applicable.
6.1.7 Recycling labelling
Subclause 6.1.7 of IEC 60095-1:2018 is applicable.
6.1.8 Identification of start and stop
In addition to the mandatory information defined in IEC 60095-1, the battery could be marked
with a symbol showing the micro-cycle application.
For better identification and comparison of batteries within the scope of this document, a
special marking could be used by the battery manufacturer.
Examples: Europe EN label and Japan label:

6.1.9 Valve-regulated batteries
Subclause 6.1.8 of IEC 60095-1:2018 is applicable.
6.2 Marking of the polarity
The terminals shall be identified according to the requirements of IEC 60095-2.

– 10 – IEC 60095-6:2019 © IEC 2019
6.3 Fastening of the battery
Where batteries are fastened to the vehicle by means of integral parts (for example, bottom
ledges), these shall be in compliance with the requirements of IEC 60095-2.
7 Functional characteristics
7.1 Electrical characteristics
7.1.1 The cranking performance, the 20 h capacity, the reserve capacity, the charge
retention and the water consumption have the same definition as in IEC 60095-1:2018.
The charge acceptance tests and the endurance tests are adapted for the micro-cycle
applications.
7.1.2 The cranking performance is the discharge current I , as indicated by the
cc
manufacturer according to the option chosen (option 1 or option 2), which a battery can
supply according to 9.3.
7.1.3 The capacity of a starter battery is defined for a temperature of 25 °C ± 2 °C.
It may be indicated by the manufacturer as either:
• nominal 20 h capacity C , or
• nominal reserve capacity RC .
n
C and RC are defined in IEC 60095-1:2018 in 7.1.2.
20 n
7.1.4 The charge acceptance consists of two parts:
• the charge acceptance 1 (at 0 °C) defined in IEC 60095-1:2018, 7.1.3.
• the charge acceptance 2 (at 25 °C) is a specific requirement for the micro-cycle
applications.
7.1.5 The charge retention is defined in IEC 60095-1:2018, 7.1.4.
7.1.6 The endurance test consists in four parts:
• the "corrosion test" represents the ability of a battery to perform repeated
overcharge/storage periods.
• the "cycling test 50 % DoD" represents the ability of a battery to perform repeated
discharge/ recharge cycles and long rest periods on open circuit. This ability shall be
tested by a series of cycles and rest periods under specified conditions after which the
cold cranking or the capacity performances shall be determined.
• the "cycling test 17,5 % DoD" represents the ability to deliver energy under high cyclic
conditions in a partially discharged state of charge.
• the "micro-cycle test" represents the ability of a battery to provide the power to restart the
engine after frequent stop phases, its ability to recover state of charge afterwards and the
aging effects due to shallow pulse loads.
7.1.7 The water consumption is defined in IEC 60095-1:2018, 7.1.6.
VRLA have a very low water consumption and are not intended to receive additional water.
Most of the time, EFB have a sealed lid and are not intended to receive additional water due
to their very low water consumption.

7.2 Mechanical characteristics
7.2.1 The vibration resistance and the electrolyte retention have the same definitions as in
IEC 60095-1.
7.2.2 "Vibration resistance" represents the ability of a battery to maintain service under
periodic or irregular acceleration forces. Minimum requirements shall be verified by a test (see
9.7).
7.2.3 "Electrolyte retention" is the ability of a battery to retain the electrolyte under
specified physical conditions (see 9.8).
8 General test conditions
8.1 Sampling of batteries
Samples shall be tested not later than:
• 45 days after production date of the manufacturer in the case of filled batteries;
• 60 days after production date of the manufacturer in the case of dry-charged batteries.
8.2 Charging method – Definition of a fully charged battery
This is defined in IEC 60095-1:2018, 8.2.
8.3 Test equipment
8.3.1 Measuring instruments
This is defined in IEC 60095-1:2018, 8.3.1.
Specific requirements for measuring equipment capability are given in Annex A for the
dynamic charge acceptance test of 9.4.2 and micro-cycle test of 9.6.4.
8.3.2 Water bath
This is defined in IEC 60095-1:2018, 8.3.2.
8.3.3 Environmental chamber
This is defined in IEC 60095-1:2018, 8.3.3.
8.4 Test sequence
a) Initially, the batteries are subjected to the following series of tests:
or RC check;
– first C
e e
– first cranking performance test;
or RC check;
– second C
e e
– second cranking performance test;
or RC check;
– third C
e e
– third cranking performance test.
The 20 h capacity test C is defined in IEC 60095-1:2018, 9.1, the reserve capacity test
e
RC is defined in IEC 60095-1:2018, 9.2.
e
For C or RC and the cranking performance, the specified values shall be met in at least
e e
one of the relevant discharges given in a).

– 12 – IEC 60095-6:2019 © IEC 2019
It is not necessary to complete the sequence if the specified values are achieved on the
first or second test.
NOTE 1 The choice between testing C or RC is the decision of the customer or user.
e e
b) The tests according to Tables 1 or 2 shall be carried out only if the batteries have
complied with the tests mentioned in a), and no more than one week after completion of
the said tests.
NOTE 2 The choice between testing C or RC is the decision of the customer or user.
e e
Table 1 – Test/battery OPTION A
Battery
Test
*B B B B B B
1 2 3 4 5 6
Initial charge prior to test      
st st
1 20 h capacity 1 reserve capacity  C    
st
1 cranking performance     
nd nd
2 20 h capacity 2 reserve capacity  C () () () ()
nd
2 cranking performance (√) () () () ()
rd rd
3 20 h capacity 3 reserve capacity  C () () () ()
rd

3 cranking performance
Charge acceptance 1 (9.4.1) 
Charge acceptance 2 (SBA) (9.4.2)  

Corrosion test
Cycling test 50 % DoD 
Endurance tests (9.6)
Cycling test 17,5 % DoD  
Micro-cycling SBA (9.4.2)  
Charge retention (9.5)   

Electrolyte retention (9.8)
Vibration resistance (9.7)    
Key
√ test to be fulfilled.
(√) test to be fulfilled only if the previous identical test carried out failed.
* Important: Battery B shall perform the full sequence of 3 tests at 20 h capacity (not RC) before the charge
acceptance test of 9.4.1.
Table 2 – Test/battery OPTION B
Battery
Test
*B B **B B B B B
1 2 3 4 5 6 7
      
Initial charge prior to test
st st
1 20 h capacity 1 reserve capacity  C   C   
20 20
st
1 cranking performance      

nd nd

2 20 h capacity 2 reserve capacity  C  C () () ()
20 20
nd
2 cranking performance () () () () () ()

rd rd
3 20 h capacity 3 reserve capacity  C ()  C () () ()
20 20
rd
3 cranking performance () () () () () ()

Charge acceptance 1 (9.4.1) 
()
Charge acceptance DCA (9.4.2) 

Corrosion test 
Cycling test 50 % DoD 
Endurance tests (9.6)

Cycling test 17,5 % DoD
Micro-cycling MHT (9.6.4) 
Charge retention (9.5) 

Electrolyte retention (9.8)
Vibration resistance (9.7) 
Key
 test to be fulfilled
() test to be fulfilled only if the previous identical test carried out failed
* Important: Battery B shall perform the full sequence of 3 tests at 20 h capacity (not RC) before the charge
acceptance test, in 9.4.1.
** Important: Battery B shall perform the full sequence of 3 tests at 20 h capacity (not RC) before the cycling
test at 17,5 % DoD, in 9.6.3.
9 Tests methods
9.1 20 h capacity check C
e
This test is defined in IEC 60095-1:2018, 9.1.
9.2 Reserve capacity check RC
e
This test is defined in IEC 60095-1:2018, 9.2.
9.3 Cranking performance test
9.3.1 Cranking performance test – Standard temperature (−18 °C)
This test is defined in IEC 60095-1:2018, 9.3.1.

– 14 – IEC 60095-6:2019 © IEC 2019
9.3.2 Cranking performance test – Very cold climates
This test is defined in IEC 60095-1:2018, 9.3.2.
9.4 Charge acceptance tests
9.4.1 Charge acceptance 1 (at 0 °C)
This test is defined in IEC 60095-1:2018, 9.4.
9.4.2 Specific charge acceptance tests for batteries for micro-cycle applications (at
25 °C)
Two options are possible, only one of the following test procedures have to be carried out to
fulfil the specific charge acceptance tests.
OPTION A:
The specific charge acceptance (SBA test 2) shall be as follows:
1) The test shall be carried out on batteries which have been charged in accordance with
8.2.
2) The battery shall be placed in a water bath at 25 °C ± 2 °C according to 8.3.2.
Then the battery shall be discharged with a current equal to 3,42 times the 20 h rate
for 30 min.
current I
NOTE 1 The discharging current 3,42 I is rounded to one decimal place.
3) After completion of discharging, the battery shall remain in the water bath at 25 °C ± 2 °C
for 16 h to 24 h.
4) The battery shall be charged with the constant voltage of 14,50 V ± 0,03 V in the water
bath at 25 °C ± 2 °C, and the current value shall be recorded up to 10 s ± 0,1 s after
starting the charging at intervals of 0,1 s. The maximum value of limiting current shall be
200 A ± 0,5 A.
In a case where the voltage at 0,1 s after starting the charging is found to reach 14,5 V,
the limiting current may be reduced.
5) The charged capacity Q (ampere seconds) shall be determined by the following
CHA
formula:
Q = (I + I + ……. + I + I ) × 0,1
CHA 0,1s 0,2s 9,9s 10s s
or
10 s
Q = I dt
CHA
∫
0s
where
I + I etc. is the charging current after 0,1 s, 0,2 s, etc.
0,1 s 0,2 s
t is the subscript which represents time, ranging from 0,1 to 10 in
s s
increments of 0,1
s.
NOTE 2 The charging current can be recorded after 10 s to 60 s from start of charging.
OPTION B:
The specific charge acceptance (dynamic charge acceptance test, EN DCA) shall be as
follows (see Annex B for flowchart of test procedure).

Purpose: Batteries in start-stop applications shall be recharged in a short time frame to
maintain energy balance during vehicle operation. To determine the dynamic charge
acceptance capability it is therefore necessary to differentiate between batteries suitable for
start-stop and for standard applications. This test shall check the ability of a battery to adsorb
current peaks at different SoC after charging or discharging operation as well as after
simulated start-stop and regenerative braking operation. It shall indicate the decrease of
dynamic charge acceptance under conditions of micro-cycle applications.
1) Procedure:
During the entire test procedure, the battery shall be placed into a water bath at
(25 ± 2) °C, according to 8.3.2. This test consists of three consecutive parts:
• Pre-cycling
• Charge acceptance tests qDCA delivering I and I
c d
• DCR micro-cycling part delivering I
ss r
The final result is calculated by using results I , I and I . Flow charts of the test
c d r
procedures are depicted in Annex A.
Abbreviations used in this subclause:
• DCA – dynamic charge acceptance;
• qDCA – quick DCA test;
• DCA – DCA pulse profile (see Figure B.1);
pp
• DCR – dynamic charge acceptance real world start-stop (see Figure B.2, Figure B.3,
ss
and Figure B.4).
2) Pre-cycling shall be defined according to the scheme set out in Table 3.
Table 3 – DCA – Pre-cycling
Structure N° Step T U I Description Data Result of
acquisition measurement
of each step
Pre- 10 DCH > 10,5 25 RC discharge EOS RC capacity
cycling
11 CHA 24 h U 5·I Recharge voltage for EOS Ah recharged
c n
flooded or VRLA
End of charge current
batteries
12 PAU 1 h Rest phase
13 DCH > 10,5 25 RC discharge EOS RC capacity
14 CHA 24 h U 5·I Recharge voltage for EOS Ah recharged
c n
flooded or VRLA
End of charge current
batteries
15 PAU 1 h Rest phase
16 DCH > 10,5 1·I C discharge EOS C calculate:
n e e
C = C – 0,2 · C
rch e n
17 CHA U 5·I Recharge voltage for Stop recharge when
c n
flooded or VRLA
C [Ah] is reached
batteries rch
NOTE 3 The RC discharge of steps 10 and 13 has to reach at least 90 % of the RC and the C discharge of
n e
step 16 has to reach at least 90 % of the C .
n
3) The charge acceptance qDCA procedure shall be defined according to the scheme set out
in Table 4. The DCA procedure used in steps 21 and 27 is defined in Table 5.
pp
– 16 – IEC 60095-6:2019 © IEC 2019
Table 4 – DCA – Charge acceptance qDCA procedure
Procedure N° Step T U I Description Data Result of
acquisition measurement
of each step
Charge 20 PAU min 20 h Rest phase EOS OCV
acceptance
max 72 h
tests
21 DCA DCA procedure EOS I = integrated
qDCA pp pp c
charge / 200 s
22 CHA 12 h U 5·I Recharge voltage for EOS
c n
flooded / VRLA
23 CHA 4 h 18,0 / 0,5·I / Recharge voltage for EOS
n
14,8 5·I flooded / VRLA
n
24 PAU 1 h Rest phase EOS
25 DCH 2 h I EOS
n
26 PAU 20 h Rest phase EOS
27 DCA DCA procedure EOS I = integrated
pp pp d
charge / 200 s
28 DCH 2 h I EOS
n
29 PAU min 12 h  Rest phase EOS
max 72 h
Step 23: For flooded batteries, a combination of constant voltage (CV) and constant
current (CC) charging (with "unlimited" voltage) is applied. The given voltage limit of 18 V
is meant as a safety limit.
Steps 21 and 27: The average charge currents I and I are calculated according to the
c d
calculation given in item 6) of this list. Please note that both I and I are charge currents,
c d
the index "c" or "d" means "charge history" or "discharge history".
4) The DCA procedure (in steps 21 and 27 of Table 4) shall be defined according to the
pp
scheme set out in Table 5.
Table 5 – DCA – DCA procedure
pp
Procedure N° Step t U I Description Data Result of
acquisition measurement
of each step
DCA 30 CHA 10 s 14,8 33,3·I Charge pulse EOS Increment I or I by
pp n c d
procedure
amount of charge ΔQ
i
31 PAU 30 s Rest phase
32 DCH 20·I Discharge Stop discharge when
n
ΔQ [Ah] is reached
i
(x = 1 to 20)
33 PAU 30 s Rest phase
34 RPT Run steps 30 to 33
20 times
5) Calculation:
• The average charge current for the 20 pulses after the preceding charging step 17 (I ),
c
is calculated from the integrated amount of charge over all pulses divided by the total
charge time (Table 4, step 21):

Idt
Q
∫∑
i
li> 0 =1 to 20
I [A]
c
200 s 200 s
NOTE 4 Usually Q is calculated by the test bench and returned in units of Ah. I is calculated from the sum of
i c
the charged Ah values of the 20 steps by multiplying it with 3 600 s/h and dividing the result by 200 s.
• The average charge current for the 20 pulses after the preceding discharge step 25 (I ), is
d
calculated from the integrated amount of charge over all pulses divided by the total charge
time (Table 4, step 27):
Idt
Q
∫∑
i
li> 0 =1 to 20
I [A]
d
200 s 200 s
NOTE 5 Usually Q is calculated by the test bench and returned in units of Ah. I is calculated from the sum of
i d
the charged Ah values of the 20 steps by multiplying it with 3 600 s/h and dividing the result by 200 s.
6) For the DCR test part, a resistor combination shall be connected across the battery
ss
terminals, consisting of a parallel connection of two E96 (1 %) resistors (see IEC 60063),
each with minimum rated power dissipation of 0,25 W, and each of which comes closest to
75 000 Ω·Ah, divided by C . Verify and document the resistance of the parallel
n
combination. Example: For C = 80 Ah, use two parallel resistors of 931 Ω each, which –
n
within the E96 series – comes closest to 75 000 Ω·Ah / 80 Ah = 937,5 Ω, so that the total
resistance of the combination of both resistors in parallel is 466 Ω in this example.
For ampere hours balance control during the DCR test, a modified ampere hours counter
ss
...