Is the lithium iron phosphate cell safe under overcharge conditions?,
lithium iron,

▍What is GOST-R Declaration?

GOST-R Declaration of Conformity is a declaration document to prove goods are complied with Russian safety regulations. When the Law of Product and Certification Service was issued by Russian Federation in 1995, compulsory product certification system came into force in Russia. It requires all products sold in Russian market to be printed with GOST mandatory certification mark.

As one of methods of mandatory conformity certification, Gost-R Declaration of Conformity bases on inspection reports or quality management system certification. In addition, Declaration of Conformity has the characteristic that it can only be issued to a Russian legal entity which means the applicant (holder) of the certificate can only be a Russian officially registered company or foreign office that registered in Russia.

▍GOST-R Declaration Type and Validity

1. Single Shipment Certificate

Single shipment certificate is only applicable to specified batch, specified product stipulated in a contract. Specific information is strictly under control, such as item name, quantity, specification, contract and Russian client.

2. Certificate with validity of one year

Once a product is granted the certificate, manufacturers can export products to Russia within 1 year without limit of shipment times and quantities to specific client.

3. Certificate with validity of three/five years

Once a product is granted the certificate, manufacturers can export products to Russia within 3 or 5 years without limit of shipment times and quantities to specific client.

▍Why MCM?

●MCM possesses a group of engineers to study Russian latest regulations, ensuring latest GOST-R certification news can be shared accurately and timely with clients.

●MCM builds close cooperation with the local the earliest-established certification organization, providing stable and effective certification service for clients.

▍What is EAC?

According to The Relevant Common Criteria and Rules of Technical Regulations for Kazakhstan, Belarus and the Russian Federation which is an agreement signed by Russia, Belarus and Kazakhstan on October 18 2010, the Customs Union Committee shall devote to formulating uniform standard and requirement to ensure the safety of product. One certification is applicable for three countries, which forms the Russia-Belarus-Kazakhstan CU-TR certification with a uniform mark EAC. Regulation put into effect gradually from February 15^th 2013. In January 2015, Armenia and Kyrgyzstan joined Customs Union.

▍CU-TR Certificate Type and Validity

1. Single Shipment Certificate

Single shipment certificate is only applicable to specified batch, specified product stipulated in a contract. Specific information is strictly under control, such as item name, quantity, specification contract and Russian client. When applying for the certificate, no samples are requested to offer but documents and information are required.

1. Certificate with validity of one year

Once a product is granted the certificate, manufacturers can export products to Russia within 1 year without limit of shipment times and quantities.

1. Certificate with validity of three years

Once a product is granted the certificate, manufacturers can export products to Russia within 3 years without limit of shipment times and quantities.

1. Certificate with validity of five years

Once a product is granted the certificate, manufacturers can export products to Russia within 5 years without limit of shipment times and quantities.

▍Why MCM?

●MCM possesses a group pf professional engineers to study custom union latest certification regulations, and to provide close projects follow-up service, ensuring clients’ product enter into the region smoothly and successfully. 

●The abundant resources accumulated through battery industry enables MCM to provide efficient and lower-cost service for client. 

●MCM builds close cooperation with local relevant organizations, ensuring latest information of CU-TR certification is shared accurately and timely with clients.

In the overcharge test, the voltage rises rapidly after the cell voltag exceeds the platform voltage of about 5.7V.
However, due to the limitation of the set voltage (6.4V), the 6.4V voltage is maintained and the cell is continuously
charged until the cell is damaged. But the test did not catch fire (visible flame) or explosion (the battery cell was
completely disintegrated); the highest temperature reached nearly 280℃.
Conclusion
It can be seen from the test results that this overcharge test method effectively simulates the situation that can
occur when the cell is overcharged. The aluminum-shell lithium iron phosphate battery has undergone
processes such as swelling, exhaust, heating, and damage without fire (visible flame) and or explosion
(complete disintegration) during overcharge. In many repeated tests and previous tests, it is concluded that
lithium iron phosphate cells are relatively safe under overcharged conditions.