A new round of discussion on UL2054 proposal,
Ul2054,

▍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.

【Contents of the proposal】
On June 25, 2021, UL official website released the latest amendment proposal to the UL2054 standard. The solicitation of opinions lasts until July 19, 2021. The followings are the 6 amendment items in this proposal:
1. Inclusion of the general requirements for the structure of wires and terminals: the insulation of wires should meet the requirements of UL 758;
2. Miscellaneous amendments to the standard: mainly misspelling correction, updates of cited standards;
3. An addition of test requirements for adhesiveness: wiping test with water and organicsolvents;
4. Increase of the management methods of components and circuits with the same protection function in the electrical performance test: If two identical components or circuits work together to protect the battery, when considering a single fault, two components or circuits need to be faulted at the same time.
5. Marking the limited power supply test as optional: whether the limited power supply test in Chapter 13 of the standard is carried out will be determined according to the manufacturer’s requirements. The modification of the 9.11 clause – the external short circuit test: the original standard is to use 16AWG (1.3mm2) bare copper Wire; modification suggestion: the external resistance of short circuit should be 80±20mΩ bare copper wire.