Testing Data of Cell Thermal Runaway and Analysis of Gas Production,
Analysis of Gas,

▍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.

T1 is the initial temperature at which the cell heats up and internal materials decompose. Its value reflects the overall thermal stability of the cell. Cells with higher T1 values are more stable at high temperatures. The increase or decrease of T1 will influence the thickness of SEI film. The high and low temperature aging of the cell will decrease the value of T1 and make the thermal stability of the cell worse. Low temperature aging will cause the growth of lithium dendrites, resulting in the decrease of T1, and high temperature aging will lead to the rupture of SEI film, and T1 will also decrease.
T2 is the pressure relief temperature. Timely relief of internal gas can well dissipate heat and slow down the tendency of thermal runaway.T3 is the trigger temperature of thermal runaway, and the starting point of heat release from the cell. It has a strong relationship with the substrate performance of the diaphragm. The value of T3 also reflects the thermal resistance of the material inside the cell. A cell with higher T3 will be safer under various abuse conditions.
T4 is the highest temperature the cells can reach during thermal runaway. The risk of thermal runaway spread in the module or battery system can be further evaluated by assessing the total heat generation (ΔT=T4 -T3) during thermal runaway of the cell. If the heat is too high, it will lead to thermal runaway of surrounding cells, and eventually propagation to the whole module.