What would happen if continuously heating the lithium battery?,
Batteries,

▍What is ANATEL Homologation?

ANATEL is a short for Agencia Nacional de Telecomunicacoes which is Brazil governmental authority to certified communication products for both compulsory and voluntary certification. Its approval and compliance procedures are the same both for Brazil domestic and abroad products. If products are applicable to compulsory certification, the testing result and report must be in line with the specified rules and regulations as requested by ANATEL. Product certificate shall be granted by ANATEL first before product is circulated in marketing and put into practical application.

▍Who is liable for ANATEL Homologation? 

The Brazil governmental standard organizations, other recognized certification bodies and testing labs are ANATEL certification authority for analyzing the production system of manufacturing unit, such as product design process, procurement, manufacturing process, after service and so on to verify the physical product to be complied with Brazil standard. Manufacturer shall provide documents and samples for testing and assessment.

▍Why MCM?

● MCM possesses 10 years abundant experience and resources in testing and certification industry: high quality service system, deeply qualified technical team, quick and simple certification and testing solutions.

● MCM collaborates with multiple high-quality local officially recognized organizations providing various solutions, accurate and convenient service for clients.

In recent years, reports of fires and even explosions caused by lithium-ion batteries are common.
Lithium-ion batteries are mainly composed of negative electrode material, electrolyte and positive electrode material. The chemical activity of the negative electrode material graphite in the charged state is a bit like metal lithium. The SEI film on the surface would decompose at high temperature, and the lithium ions embedded in the graphite would react with the electrolyte and the binder polyvinylidene fluoride and finally would release a lot of heat.
Alkyl carbonate organic solutions are commonly used as electrolytes, which are flammable. The positive
electrode material is usually a transition metal oxide, which has strong oxidizing properties in the charged state, and easily decomposes to release oxygen at high temperature. The released oxygen reacts with the electrolyte to oxidize, and then comes out a lot of heat.
Apperately, the lithium ion battery would be unstable when heating with high temperature. However, what
exactually would happen if we keep heating the battery? Here we conduceted a real testing to a fully charged NCM cell with voltage of 3.7 V and capacity of 106 Ah.
Testing Methods：
1. At room temperature (25±2℃), the single cell is first discharged to the lower limit voltage with a current
of 1C and left for 15 minutes. Then use 1C constant current to charge to the upper limit voltage and switch
to constant voltage charging, stop charging when the charging current drops to 0.05C, and put it aside for
15 minutes after charging;