Analysis on DGR 3m Stack Testing,
DGR 3m Stack Testing,

▍What is CTIA CERTIFICATION?

CTIA, the abbreviation of Cellular Telecommunications and Internet Association, is a non-profit civic organization established in 1984 for the purpose of guaranteeing benefit of operators, manufacturers and users. CTIA consists of all U.S. operators and manufacturers from mobile radio services, as well as from wireless data services and products. Supported by FCC (Federal Communications Commission) and Congress, CTIA performs a large part of duties and functions that were used to be conducted by the government. In 1991, CTIA created an unbiased, independent and centralized product evaluation and certification system for wireless industry. Under the system, all wireless products in consumer grade shall take compliance tests and those complying with the relevant standards will be granted to utilize CTIA marking and hit store shelves of North American communication market.

CATL (CTIA Authorized Testing Laboratory) represents labs accredited by CTIA for testing and review. Testing reports issued from CATL would be all approved by CTIA. While other testing reports and results from non-CATL will not be recognized or have no access to CTIA. CATL accredited by CTIA varies in industries and certifications. Only CATL which is qualified for battery compliance test and inspection has access to battery certification for compliance to  IEEE1725.

▍CTIA Battery Testing Standards

a) Certification Requirement for Battery system Compliance to IEEE1725— Applicable to Battery Systems with single cell or multiple cells connected in parallel;

b) Certification Requirement for Battery system Compliance to IEEE1625— Applicable to Battery Systems with multiple cells connected in parallel or in both parallel and series;

Warm tips: Select above certification standards properly for batteries used in mobile phones and computers. Do not misuse IEE1725 for batteries in mobile phones or IEEE1625 for batteries in computers.

▍Why MCM？

● Hard Technology: Since 2014, MCM has been attending battery pack conference held by CTIA in US annually, and is able to obtain latest update and understand new policy trends about CTIA in a more prompt, accurate and active way. 

●Qualification: MCM is CATL accredited by CTIA and is qualified to perform all processes related to certification including testing, factory audit and report uploading.

Last month the International Air Transport Association released the latest DGR 64TH, which will be implemented on January 1st, 2023. In the terms PI 965 & 968, which is about lithium-ion battery packing instruction, it requires prepared in accordance with Section IB must be capable of 3 m stack.Objects: Package in accordance with PI 965 & PI968 IB.
Requirement: The surface of a package will get a force, which equals to the stress of the same packages that will be stacked at least 3m high, and keep for 24 hours.Check the appearance of packages and make sure there’s no broken.Check the height of package and confirm the number (n) of packages needed for stacking 3 meters high.Calculate the mass of stressing packages (n-1) * m (m equals to the mass of one package, unit: kg) to get the stressing force.Put the package on the center of the platform of instrument. Set the F and testing time. Activate the testing equipment.Acceptance Criteria: Samples shall not leakage. Any testing samples cannot have changes that may cause any negative impact, or deformation causing less strength or unstableness. That means cartons cannot be broken, and the cells and batteries cannot be broken or deformed.