Issue of UL 1642 new revised version – Heavy impact replacement test for pouch cell,
UL 1642,

▍What is ANATEL Homologation?

ANATEL is a short for Agencia Nacional de Telecomunicacoes which is Brazil governmental authority to certified communication products for both compulsory and voluntary certification. Its approval and compliance procedures are the same both for Brazil domestic and abroad products. If products are applicable to compulsory certification, the testing result and report must be in line with the specified rules and regulations as requested by ANATEL. Product certificate shall be granted by ANATEL first before product is circulated in marketing and put into practical application.

▍Who is liable for ANATEL Homologation? 

The Brazil governmental standard organizations, other recognized certification bodies and testing labs are ANATEL certification authority for analyzing the production system of manufacturing unit, such as product design process, procurement, manufacturing process, after service and so on to verify the physical product to be complied with Brazil standard. Manufacturer shall provide documents and samples for testing and assessment.

▍Why MCM?

● MCM possesses 10 years abundant experience and resources in testing and certification industry: high quality service system, deeply qualified technical team, quick and simple certification and testing solutions.

● MCM collaborates with multiple high-quality local officially recognized organizations providing various solutions, accurate and convenient service for clients.

A new version of UL 1642 was released. An alternative to heavy impact tests is added for pouch cells. The specific requirements are: For pouch cell with capacity that are greater than 300 mAh, if pass the heavy impact test were not passed, they can be subjected to Section 14A round rod extrusion test.Pouch cell has no hard case, which often leads to cell rupture, tap fracture, debris flying out and other serious damage caused by failure in heavy impact test, and makes it impossible to detect the internal short circuit caused by the design defect or process defect. With round rod crush test, possible defects in the cell can be detected without damaging the cell structure. The revision was made with this situation in consideration.Place a sample on a flat surface. Put a round steel rod with a diameter of 25±1mm on the top of the sample. The edge of the rod should be aligned with the top edge of the cell, with the vertical axis perpendicular to the tab (FIG. 1). The length of the rod should be at least 5mm wider than each edge of the testing sample. For cells with positive and negative tabs on opposite sides, each side of the tab needs to be tested. Each side of tab should be tested on different samples.Measurement of thickness (tolerance ±0.1mm) for cells shall be performed prior to testing in accordance with Appendix A of IEC 61960-3 (Secondary cells and batteries containing alkaline or other non-acidic electrolytes – Portable secondary lithium cells and batteries – Part 3: Prismatic and cylindrical lithium secondary cells and batteries)Then squeeze pressure is applied on the round rod and the displacement in the vertical direction is recorded (FIG. 2). The moving speed of the pressing plate shall not be greater than 0.1mm /s. When the deformation of the cell reaches 13±1% of the thickness of the cell, or the pressure reaches the force shown in Table 1 (different cell thicknesses correspond to different force values), stop the plate displacement and hold it for 30s. The test ends.No fire or explosion of samples.