The detection technology expert of China accreditation service went to dongguan yiling electronic technology for technical training

On October 15, 2019, c&c testing technical experts were invited to dongguan yiling electronic technology co., ltd. to conduct on-site training for its sales and engineering team on IEC62133 standard and international CB certification. General manager ma made the original crude theoretical knowledge lively and easy to understand by explaining in a simple way and from point to point, so that participants could have a clearer and deeper understanding of the practical application of IEC62133 testing and battery application for CB certification.

Introduction to the IEC62133 test

In December 2012, the international electrotechnical commission (IEC) officially released the international safety standards for battery products IEC62133 second edition IEC62133:2012 (ed2.0), which is mainly aimed at containing alkaline or acidic electrolyte monomer battery and battery pack and portable sealed battery and battery safety requirements (lithium battery, nickel metal hydride batteries, nickel-cadmium batteries type). The battery laboratory will conduct in-depth analysis of the content of the new IEC 62133, so that customers can have an in-depth understanding of the new IEC 62133 standard requirements.

The new version of EC62133 is divided into two parts: nickel battery system and lithium battery system. This paper takes the lithium battery system part as an example to introduce the main change points.

Mandatory internal short circuit, overcharge (pack), transportation test and lithium battery design are added to the test items. At the same time, the charging steps and the continuous low voltage charging test items have been updated.


1. Charging steps after the update

According to the requirements of the new IEC 62133, when the cell is tested for the following three external short circuits, thermal shock, extrusion, and battery tests for external short circuits, the cell or battery charging shall be performed under the maximum and minimum charging temperature limits.

2. Added forced internal short circuit test

The purpose of this test is to simulate the potential danger degree of metal dust, scrap particles and other impurities that may enter the cell during the manufacturing process, and Pierce the diaphragm between the positive and negative poles and cause an internal short circuit. The test object is a cylindrical or prismatic cell. The test is currently only available in South Korea, Japan, Switzerland and France.

3. New transportation test

According to the new IEC6213 requirements, the lithium battery must pass the relevant tests in accordance with the requirements of IEC62281, and its test items are the same as UN38, 3 test items. Therefore, if the manufacturer can provide documents proving that it meets the requirements of transportation, the transportation test is not required to be tested, and the transportation test is directly qualified.

IEC 62133 mainly consists of the following tests:

Battery cell (ce11), continuous low rate charging, vibration, temperature cycle, external short circuit, internal short circuit, free fall, impact 1(collision), thermal high temperature (thermal shock), extrusion, low pressure, battery overcharge, forced discharge, high rate charging protection.

Lithium battery), labeling and packaging, transportation test, incorrect installation (nickel system).

Battery (atesy): dynamic and high temperature shell stress, temperature cycle, external short circuit, internal short circuit. Free drop, impact impact, labeling and packaging, transportation testing, overcharging (nickel system)

Most of these test and verification projects are common and routine test projects, but some of them deserve attention and attention

1.13 kn extrusion. The test object of this project is the electric cell. Although it is a common routine project, the square electric cell needs to be extruded in the long and short axial direction, namely the length and width of the electric cell. According to the test experience, when the polymer flexible packaging cell in the extrusion of the width axis (side), there are some unqualified phenomena such as combustion or explosion. Therefore, for polymer flexible packaging cell, it is recommended to focus on this project.

2. Continue charging at a low rate. The test object of this project is the electric cell. According to the standard, a fully charged cell can be charged continuously for 28 days in the way specified by the manufacturer. This project is not common in other safety standards. Since the charging method stipulated by the battery manufacturer is basically constant current and constant voltage charging, it requires the manufacturer to take into full consideration when specifying and limiting the charging current and even the cut-off voltage when charging at full capacity. If necessary, the design of the battery cell should consider the sustainable charging capability.



customers

Ling technology introduction: is a collection of r & d, production and sales in the body of large lithium ion battery production high-tech enterprises. The main products are lithium battery battery series. Yiling technology has been focusing on the research and development of lithium battery products since its establishment. Yiling battery industry center - yiling jiangxi industrial park, located in ganzhou, jiangxi province, covers an area of 130,000 square meters and has more than 300 employees, including more than 50 engineers and technicians. The product process is mature, the specification is complete, the company has the perfect production management system and the quality control system has a strong research and development and management team. Products are also exported to Hong Kong, Taiwan, southeast Asia and Europe and the United States and other regions, to meet with the approval of more than 3000 companies at home and abroad users one ling battery based on domestic, around the world, is the power of the "made in r&d + + service" overall solutions provider, is also an emphasis on social responsibility and the diversity of science and technology innovation of new energy enterprises. In the future, yiling technology will base itself on lithium power, extend to develop other related new energy industries, and serve the society with green technology. Committed to become a world-class brand of lithium and new energy well-known enterprises.

China accreditation service (About ZRLK)

Cnca testing is a national high-tech enterprise and a third-party testing organization for testing and certification of battery and consumer products. It has full standard testing capability for battery and battery peripheral products and has obtained CNAS qualification, metrology CMA and international CBTL qualification authorized by China national accreditation service for conformity assessment. The 15-year testing and certification team, rooted in the field of battery and consumer products testing, provides product testing and certification services for global enterprises.