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

▍SIRIM Certification

For the security of person and property, Malaysia government establishes product certification scheme and puts surveillance on electronic appliances, information & multimedia and construction materials. Controlled products can be exported to Malaysia only after obtaining product certification certificate and labeling. 

▍SIRIM QAS

SIRIM QAS, a wholly-owned subsidiary of the Malaysian Institute of Industry Standards, is the only designated certification unit of the Malaysian national regulatory agencies (KDPNHEP, SKMM, etc.).

The secondary battery certification is designated by KDPNHEP (Malaysian Ministry of Domestic Trade and Consumer Affairs) as the sole certification authority. Currently, manufacturers, importers and traders can apply for certification to SIRIM QAS and apply for the testing and certification of secondary batteries under the licensed certification mode.

▍SIRIM Certification- Secondary Battery

Secondary battery is currently subject to voluntary certification but it is going to be in the scope of mandatory certification soon. The exact mandatory date is subject to the official Malaysian announcement time.  SIRIM QAS has already started accepting certification requests.

Secondary battery certification Standard : MS IEC 62133:2017 or IEC 62133:2012

▍Why MCM?

● Established a good technical exchange and information exchange channel with SIRIM QAS who assigned a specialist to handle with MCM projects and inquiries only and to share the latest precisely information of this area.

● SIRIM QAS recognizes MCM testing data so that samples can be tested in MCM instead of delivering to Malaysia.

● To provide one-stop service for Malaysian certification of batteries, adapters and mobile phones.

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.