New Testing Measurements Replacing Internal Short Circuit—A detailed analysis on new
New Testing Measurements Replacing Internal Short Circuit—A detailed analysis on new,
New Testing Measurements Replacing Internal Short Circuit—A detailed analysis on new,
▍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.
Although voluntary in nature, the official document also mentioned that if there are units describe this certification as “the basis for its mandatory provisions, comply with its provisions. Different from the CCC battery program mode, battery systems also need factory audit and then issue report. Factory audit is necessary for the first time to apply for certification, while subsequent additions to the series models do not require repeat factory audit. However, an annual factory inspection is required for certificate maintenance, while the battery cells are not required.
The new version mentions a new forced internal shorting test. The new method is to stimulate internal shorting by penetrating to create positive and negative tabs in layer 1 and 2 shorting. The procedure is as followed: 1. Cell preparing: Drill a hole in the center of the largest face (as figures below) or reserve a hole when manufacturing for venting.2. Fixation of the cell: After fully charged, fix the cell in the testing tools. The cell shall be electrically isolated from the test bench. The cell and indenter shall move along the perpendicular axis. The indentation position shall be the same as described in forced internal shorting.
