General Specification for the Space-using Li-ion Storage Battery,
Storage Battery,

▍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.

Appearance and mark The appearance should be intact; the surface should be clean; the parts and
components should be complete. There should be no mechanical defects, no extras and other defects. The product identification shall include the polarity and traceable product number, where the positive pole is represented by “+” and the negative pole isrepresented by “-”.
Dimensions and weight The dimensions and weight should be consistent with the technical specifications of the storage battery. Airtightness The leakage rate of the storage battery is not more than 1.0X10-7Pa.m3.s-1; after thebattery is subjected to 80,000 fatigue life cycles, the welding seam of the shell should not be
damaged or leaked, and the burst pressure should not be lower than 2.5MPa.For the requirements of tightness, two tests are designed: leakage rate and shell burst pressure; the analysis should be on test requirements and test methods: these requirements mainly consider the leakage rate of the battery shell under low pressure conditions and its ability to withstand gas pressure.Electrical performance
Ambient temperature (0.2ItA, 0.5ItA), high temperature, low temperature capacity, charge and discharge efficiency, internal resistance (AC, DC), charged retention capacity, pulse test.
Environmental adaptability
Vibration (sine, random), shock, thermal vacuum, steady- state acceleration.
Compared to other standards, thermal vacuum and steady-state acceleration test chambers
have a special requirement; in addition, the acceleration of the impact test reaches 1600g,
which is 10 times the acceleration of the commonly used standard.