Implementation of GB/T 34131-2023,
GB/T 34131-2023,

▍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.

The 2017 version of the national standard Technical Standard for Battery Management System of Electrochemical Energy Storage Station (GB/T 34131-2017) has been revised, and the 2023 version of the national standard Battery Management System for Electric Energy Storage (GB/T 34131-2023) has been officially released recently and will be officially implemented on October 1 this year. The new GB/T 34131 mainly has the following changes:
The data acquisition error range and sampling period of current, voltage and temperature are more strictly stipulated;
The technical requirements and test methods of communication, control, insulation resistance detection, insulation voltage resistance, high and low temperature, salt-fog resistance, electrical adaptability, electromagnetic compatibility and other aspects are added;
The operating environment temperature of BMS is revised from 0~45℃ to -20~65℃. The maximum allowable error of SOE is revised from 8% to 5%. The average trouble-free working time is revised from not less than 40000h to not less than 20000h, and the operating life is not less than 10 years;
The related requirements of sampling testing have been added.
These changes will bring significant changes to BMS equipment manufacturing, engineering design, inspection, operation and maintenance. Relevant enterprises also need to pay attention to the content of the new standard in a timely manner and make preparations early.