New Methods of Triggering Thermal Run Away,
Thermal Run Away,

▍What is CB Certification？

IECEE CB is the first genuine international system for mutual recognition of electrical equipment safety test reports. NCB (National Certification Body) reaches a multilateral agreement, which enables manufacturers to obtain national certification from other member countries under CB scheme on the basis of transferring one of the NCB certificates.

CB certificate is a formal CB scheme document issued by authorized NCB, which is to inform other NCB that the tested product samples conform to present standard requirement.

As a kind of standardized report, CB report lists relevant requirements from IEC standard item by item. CB report not only provides results of all required testing, measurement, verification, inspection and assessment with clearness and non-ambiguity, but also including photos, circuit diagram, pictures and product description. According to the rule of CB scheme, CB report will not take effect until it presents with CB certificate together.

▍Why we need CB Certification?

1. Directly recognized or approved by member countries

With CB certificate and CB test report, your products can be exported to some countries directly.

1. Convert to other countries certificates

The CB certificate can be directly converted to the certificate of its member countries, by providing the CB certificate, test report and difference test report (when applicable) without repeating the test, which can shorten the lead time of certification.

1. Ensure the Safety of Product

The CB certification test considers the product’s reasonable use and foreseeable safety when misused. The certified product proves the satisfactory of the safety requirements.

▍Why MCM? 

● Qualification: MCM is the first authorized CBTL of IEC 62133 standard qualification by TUV RH in mainland China.

● Certification and testing capability: MCM is among the first patch of testing and certification third party for IEC62133 standard, and has finished more than 7000 battery IEC62133 testing and CB reports for global clients.

● Technical support: MCM possesses more than 15 technical engineers specialized in testing as per IEC 62133 standard. MCM provides clients with comprehensive, accurate, closed-loop type of technical support and leading-edge information services.

With more accident caused by lithium-ion battery happens, People are more concerned about battery thermal run away, as the thermal run away occurring in one cell may spread heat to other cells, leading to shut-down of the whole battery system.
Traditionally we will trigger thermal run away by heating, pinning or overcharging during tests. However, these methods can neither control thermal runaway in a specified cell, nor can they easily be implemented during tests of battery systems. Recently people are developing new method to trigger thermal runaway. The Propagation test in new IEC 62619: 2022 is an example, and it is estimated that this method will be a wide use in the future. This article is to introduce some new methods that are under research.
Laser radiation is to heat a small area with high energy laser pulse. The heat will be conducted inside the material. Laser radiation is widely used in the areas of material processing, like welding, connecting and cutting. Commonly there are kinds of laser as follows: