EN 50342-6:2015/A1:2018

Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle Applications

This European Standard 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”. Batteries with a nominal voltage of 6 V are also included in the scope of this standard. All referenced voltages need to be divided by two for 6 V batteries. The batteries under scope of this standard 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 without the need of supporting 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 need to be 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 of these additional properties, those batteries need to crank the ICE and support the lighting and also auxiliary functions in a standard operating mode with support of the alternator when the internal combustion engine is switched on. All batteries under this scope need to fulfil basic functions, which are tested under application of EN 50342-1:2015. This European Standard is applicable to batteries for the following purposes: • Lead-acid batteries of the dimensions according to EN 50342-2 for vehicles with the capability to automatically switch off the ICE during vehicle operation either in standstill or moving (“Start-Stop”); • Lead-acid batteries of the dimensions according to EN 50342-2 for vehicles with Start-Stop applications with the capability to recover braking energy or energy from other sources. This standard is not applicable to batteries for purposes other than mentioned above, but it is applicable to EFB delivered in dry-charged conditions according to EN 50342-1:2015, Clause 7. NOTE The applicability of this standard also for batteries according to EN 50342-4 is under consideration.

Blei-Akkumulatoren-Starterbatterien - Teil 6 : Batterien für Mikrozyklen-Anwendungen

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

Svinčeno-kislinske zaganjalne baterije - 6. del: Baterije za mikrociklične aplikacije

General Information

• Status: Published
• Publication Date: 29-Nov-2018
• Withdrawal Date: 29-Nov-2021
• ICS: 29.220.20 - Acid secondary cells and batteries
• Technical Committee: CLC/TC 21X - Secondary cells and batteries
• Drafting Committee: CLC/TC 21X/WG 03 - Starter batteries EN 50342 - General requirements
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 30-Nov-2018
• Due Date: 14-Jul-2019
• Completion Date: 30-Nov-2018
• Ref Project: SIST EN 50342-6:2016/A1:2019 - Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle Applications

Relations

• Replaced By: EN 50342-6:2025 - Lead-acid starter batteries - Part 6: Batteries for micro-cycle applications
• Effective Date: 13-Jun-2023
• Amends: EN 50342-6:2015 - Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle Applications
• Effective Date: 23-Jan-2023

Overview

EN 50342-6:2015/A1:2018 is a European Standard developed by CLC that focuses on lead-acid starter batteries designed specifically for micro-cycle applications in vehicles. These batteries operate at nominal voltages of 12 V and 6 V and are essential for starting internal combustion engines (ICE), powering lighting, and supporting auxiliary equipment in ICE vehicles. Unlike traditional starter batteries, those covered by this standard cater to modern Start-Stop vehicle technologies, where the engine automatically switches off during stops or low-speed idling, demanding higher battery performance for frequent engine restarts and auxiliary power supply.

Key Topics

• Micro-Cycle Applications: Batteries must endure frequent charge-discharge cycles associated with Start-Stop and micro-hybrid vehicle systems.
• Voltage Specifications: Applicable to 12 V batteries and 6 V variants (with adjusted voltage references).
• Functional Requirements: Batteries guarantee engine cranking, lighting, and auxiliary electrical functions during both engine running and off phases without alternator support.
• Energy Recuperation Support: Batteries also serve in vehicles with regenerative braking functions, requiring enhanced cycling durability.
• Testing and Quality: Compliance with EN 50342-1:2015 is mandatory, including specialized tests for capacity, discharge voltage, and cycling performance tailored to micro-cycle conditions.
• Battery Dimensions: The standard aligns with EN 50342-2 for dimensional compatibility with vehicle battery compartments.
• Special Battery Types: It includes Enhanced Flooded Batteries (EFB) delivered in dry-charged conditions per EN 50342-1:2015.

Applications

• Start-Stop Vehicles: Batteries compliant with EN 50342-6:2015/A1:2018 are optimized for vehicles that automatically switch off the engine during stops or slow speed operation to save fuel and reduce emissions.
• Micro-Hybrid Systems: The standard supports batteries in vehicles using idle-stop-and-go technology, enhancing fuel efficiency and vehicle performance through frequent cycling.
• Regenerative Braking Vehicles: These batteries reliably absorb and deliver energy produced during braking, increasing energy recovery efficiency.
• Auxiliary Power Supply: They supply uninterrupted electrical power to vehicle lighting, infotainment, and other electronic systems when the engine is off.
• Automotive Industry: Original equipment manufacturers (OEMs) and aftermarket producers rely on this standard to ensure battery compatibility, safety, and durability in modern vehicles with advanced power management systems.

Related Standards

• EN 50342-1: General requirements, testing methods, and performance criteria for lead-acid starter batteries.
• EN 50342-2: Provides battery dimensional standards for automotive lead-acid batteries to ensure size compatibility.
• EN 50342-4: Covers Valve-Regulated Lead-Acid (VRLA) batteries for Start-Stop applications; applicability of EN 50342-6 to these is under consideration.
• ECE/TRANS/WP.29/343 Regulation 37: Automotive regulations referenced within EN 50342-6 for performance and safety criteria of automotive batteries.

Keywords: lead-acid starter batteries, micro-cycle applications, Start-Stop technology, automotive batteries, automotive micro-hybrid, regenerative braking batteries, EN 50342-6, vehicle battery standards, battery testing, auxiliary vehicle power, Enhanced Flooded Battery (EFB).

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2019
6YLQþHQRNLVOLQVNH]DJDQMDOQHEDWHULMHGHO%DWHULMH]DPLNURFLNOLþQHDSOLNDFLMH
Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle Applications
Blei-Akkumulatoren-Starterbatterien - Teil 6 : Batterien für Mikrozyklen-Anwendungen
Batteries d'accumulateurs de démarrage au plomb - Partie 6: Batteries pour applications
micro-cycles
Ta slovenski standard je istoveten z: EN 50342-6:2015/A1:2018
ICS:
29.220.20 .LVOLQVNLVHNXQGDUQLþOHQLLQ Acid secondary cells and
EDWHULMH batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50342-6:2015/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2018
ICS 29.220.20
English Version
Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle
Applications
Batteries d'accumulateurs de démarrage au plomb - Partie Blei-Akkumulatoren-Starterbatterien - Teil 6 : Batterien für
6: Batteries pour applications micro-cycles Mikrozyklen-Anwendungen
This amendment A1 modifies the European Standard EN 50342-6:2015; it was approved by CENELEC on 2018-08-06. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50342-6:2015/A1:2018 E

Contents Page
European foreword . 3
1 Modification to Clause 7.2.3 . 4
2 Modification to Table 15 . 4
3 Modification to Clause 7.5.5 . 4
4 Modification to Clause 7.5.5 . 4
5 Modification to Table 16 .
...