▍Introductionof certification in North America
OSHA(Occupational Safety and Health Administration) affiliated to US DOL(Department of Labor) required that all products used in workplace cannot soldin market until they are tested and certificated by NRTL. The standards used intesting include American National Standards,ASTM(American Society for TestingMaterial),UL（underwriters’Laboratory ）, and factory multi-recognitionorganization standards.
▍OSHA, NRTL, cTUVus, ETL and UL termsdefinition and relationship
OSHAmeans occupational safety and health administration, the abbreviation ofOccupational Safety &Health Administration. It’s affiliated to US DOL (Departmentof Labor).
NRTL, national recognized labs, is theabbreviation of Nationally Recognized Testing Laboratories. It’s responsiblefor the recognition of labs. Presently, there’re 18third-party testing institutions, including TUV, ITS, MET etc. were approved byNRTL.
cTUVus, the mark of TUVRH certificate in North America.
ETL is the abbreviation of American ElectricalTesting Laboratories. It’s established by Edison, an American inventor in 1896.
UL is an abbreviation of Underwriter Laboratories Inc.
▍Differences between cTUVus 、ETL, UL
|Accreditation institutionfor certification body||NRTL(Nationalapproved labs)|
|Applied market||North America(US andCanada)|
|Testing andcertification institution||Testing in UnderwriterLaboratories (China)Inc which share the project conclusionletter||MCM is in charge oftesting and TUV offers certificate||MCM is in charge oftesting and ITS offers certificate|
|Lead time||5~12 weeks||2~3 weeks||2~3 weeks|
|Application cost||The most expensive inthe filed||About 50~60% of ULcost||About 60~70% of ULcost|
|Advantage||American institutionwith high recognition in US and Canada||Internationalinstitution with high authority as well as reasonable price, and it can also berecognized by the North American market||American institution,with high recognition in North America|
|Disadvantage||Highprice for testing, factory inspection and file and certification with long leadtime.||Its brand recognitionrate in North America is lower than UL’s.||Its recognition ratefor component is lower than UL’s.|
▍Thecertification in North America for lithium battery
InNorth America, Lithium battery is not within the limited product range of NRTL,namely it does belong to mandatory products for certification. However, thelocal people will not buy product without safety mark, because of their strongsafety consciousness. So it’s necessary to apply the testing and certification,or the product will have difficulty in entering the market of North America.
▍TestingItem for Lithium battery
| Shortcircuit ||Abnormalcharge||Abusive overcharge testing||Mandatory discharge||Limitedpower source||Temperature rise test(component)||Temperaturerise test(surface)||Crush||Impact|| Shock |
|Cell|| ● || ● ||——|| ● || —— || —— || —— || ● || ● || ● |
|Battery|| ● || ● || ● || ● || ● || ● || ● || —— || —— || —— |
| TestingItem ||Vibrationtest||Lowpressure test||250Npressure test||Moldcase stress at High temperature||Droptest||Flame||Thermalabuse||Thermalcycle||flameresistance test|| |
|Cell|| ● || ● || —— || —— || —— || ● || ● || ● || —— || |
|Battery|| —— || —— || ● || ● || ● || —— || —— || —— || ● || |
|Remarks|| || || || || || || || || This test is not applicable if v-1 or shell does not need flame test. || |
▍MCM advantage for certification in North America
● MCM is the witness testing lab of TUVRH and ITS for the Certification projects inNorth America so all the tests can be completed in the lab of MCM. And alsoface-to-face communication and better service are available.
● MCM is fully equipped with large- scale, small- scale testing equipment and equipmentwith high precision applied in fields, such as electro mobile car, storageenergy, and electronic digital products etc. It able to provide comprehensive batteriestesting and certification service in North America, including the standardR100, UL1642, UL2054 etc.