Analysis on standards of China and other countries
Analysis on standards of China and other countries,
Analysis on standards of China and other countries,
▍BSMI Introduction Introduction of BSMI certification
BSMI is short for Bureau of Standards, Metrology and Inspection, established in 1930 and called National Metrology Bureau at that time. It is the supreme inspection organization in Republic of China in charge of the work on national standards, metrology and product inspection etc. The inspection standards of electrical appliances in Taiwan are enacted by BSMI. Products are authorized to use BSMI marking on the conditions that they are in compliance with safety requirements, EMC testing and other related tests.
Electrical appliances and electronic products are tested according to the following three schemes: type-approved (T), registration of product certification(R) and declaration of conformity (D).
▍What is the standard of BSMI?
On 20 November 2013, it is announced by BSMI that from 1st, May 2014, 3C secondary lithium cell/battery, secondary lithium power bank and 3C battery charger are not permitted to access to Taiwan market until they are inspected and qualified according to the relevant standards (as shown in table below).
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Product Category for Test |
3C Secondary Lithium Battery with single cell or pack ( button shape excluded) |
3C Secondary Lithium Power Bank |
3C Battery Charger |
Remarks: CNS 15364 1999 version is valid to 30 April 2014. Cell, battery and Mobile only conduct capacity test by CNS14857-2 (2002 version).
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Test Standard |
CNS 15364 (1999 version) CNS 15364 (2002 version ) CNS 14587-2 (2002 version)
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CNS 15364 (1999 version) CNS 15364 (2002 version ) CNS 14336-1 (1999 version） CNS 13438 (1995 version) CNS 14857-2 (2002 version)
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CNS 14336-1 (1999 version) CNS 134408 (1993 version) CNS 13438 (1995 version)
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Inspection Model |
RPC Model II and Model III |
RPC Model II and Model III |
RPC Model II and Model III |
▍Why MCM?
● In 2014, rechargeable lithium battery became mandatory in Taiwan, and MCM began to provide the latest information about BSMI certification and the testing service for global clients, especially those from mainland China.
● High Rate of Pass: MCM has already help clients to obtained more than 1,000 BSMI certificates till now in one go.
● Bundled services: MCM helps clients successfully enter multiple markets in worldwide through one-stop bundled service of simple procedure.
Testing temperatures are different. IEC 62620:2014 and JIS C 8715-1:2018regulates a 5℃ higher of ambient temperature than IEC 61960-3:2017. Lower temperature will make it higher viscosity of electrolyte, which will cause lower movement of ions. Thus the chemical reaction will slower, and Ohm resistance and polarization resistance will become larger, which will cause a trend of DCIR increase.SoC is different. The SoC required in IEC 62620:2014 and JIS C 8715-1:2018 is 50％±10％, while IEC 61960-3:2017 is 100%. The status of charge is very influential to DCIR. Normally DCIR testing result will get lower with increase of SoC. This is related to the procedure of reaction. In a low SoC， the charge transfer resistance Rct will be higher; and Rct will decrease with increase of SoC, so as DCIR.The discharging period is different. IEC 62620:2014 and JIS C 8715-1:2018 requires a longer discharge period than IEC 61960-3:2017. The long pulse period will cause a lower increasing trend of DCIR, and present a deviation from linearity. The reason is that the increasing of pulse time will cause a higher Rct and become dominant.The discharge currents are different. However the discharge current does not necessarily directly relate to DCIR. The relation is determined by the design.Though JIS C 8715-1:2018 refers to IEC 62620:2014, they have different definitions on high rated batteries. IEC 62620:2014 defines that high rated batteries can discharge no less than 7.0C of current. While JIS C 8715-1:2018 defines high rated batteries are those can discharge with 3.5C.
