Detailed Interpretation on IEC 62133: 2017+AMD1:2021 (edition 1.1),
Iec 62133,

▍Certification Overview

Standards and Certification Document

Test standard: GB31241-2014: Lithium ion cells and batteries used in portable electronic equipment―Safety requirements
Certification document: CQC11-464112-2015: Secondary Battery and Battery Pack Safety Certification Rules for Portable Electronic Devices

Background and Date of implementation

1. GB31241-2014 was published on December 5^th, 2014;

2. GB31241-2014 was mandatorily implemented on August 1^st, 2015. ;

3. On October 15th, 2015, Certification and Accreditation Administration issued a technical resolution on additional testing standard GB31241 for key component “battery” of the audio and video equipment, information technology equipment and telecom terminal equipment. The resolution stipulates that the lithium batteries used in the above products need to be randomly tested as per GB31241-2014, or obtain a separate certification. 

Note: GB 31241-2014 is a national compulsory standard. All the lithium battery products sold in China shall conform to GB31241 standard. This standard will be used in new sampling schemes for national, provincial and local random inspection.

▍Scope of Certification

GB31241-2014 Lithium ion cells and batteries used in portable electronic equipment―Safety requirements
Certification documents is mainly for mobile electronic products that are scheduled to be less than 18kg and can be often carried by users. The main examples are as follows. The portable electronic products listed below do not include all products, so products not listed are not necessarily outside the scope of this standard.

Wearable equipment: Lithium-ion batteries and battery packs used in equipment need to meet standard requirements.

▍Why MCM?

● Qualification recognition: MCM is a CQC accredited contract laboratory and a CESI accredited laboratory. The test report issued can be directly applied for CQC or CESI certificate;

● Technical support: MCM has ample GB31241 testing equipment and is equipped with more than 10 professional technicians to conduct in-depth research on testing technology, certification, factory audit and other processes, which can provide more accurate and customized GB 31241 certification services for global clients.

【Summary of Standard Revision】
This standard is a combination edition of IEC 62133: 2017 and AMD1: 2021, mainly covering four revision parts (refer to below detailed revision content). It is more about the completeness of the original standard, no too much technical revision, therefore, hardly effect testing ability. But changes in some testing terms may affect testing results.
【Revision content】
1、7.1.2: Revision of charging procedure: no implement the revision on cut-off current of flash charge batteries, but only some text revision and supplement. 7.1.2 Second procedureThis charging procedure applies only to 7.3.1，7.3.4，7.3.5,and 7.3.9.After stabilization for 1 h-and to 4 h, respectively, at an ambient temperature of the highest test temperature and the lowest test temperature， respectively,as specified in Table 2, cells are charged by using the upper limit charging voltage and maximum charging current, until
the charging current is reduced to 0,05 It A, using a constant current to constant voltage charging method.
IEC62133-2:2017+AMD1:2021 CSV – 15- IEC 2021NOTE The voltage and current can vary depending upon the temperature range (e.g. between T2 and T3 or between T1 and T4 of Figure A.1).Stabilization time within the specified time range should allow for thermal equilibrium to be reached where possible.