2. Domestic Standards
In China, the testing and certification standard for EV charger primarily follows GB/T 34014-2017 “Technical Requirements for Electrical Energy Metering of Non-Vehicle-Mounted Electric Vehicle Chargers,” GB/T 20234.1-2015 “Connecting Devices for Conductive Charging of Electric Vehicles—Part 1: General Requirements,” and NB/T 33008.1-2018 “Inspection and Testing Specifications for Electric Vehicle Charging Equipment—Part 1: AC and DC Charging Equipment,” among others.
Basis:
GB/T 18487.1-2023 “Electric Vehicle Conductive Charging Systems—Part 1: General Requirements”
GB/T 18487.1-2017 “Electric Vehicle Conductive Charging Systems—Part 1: General Requirements”
GB/T 34657.1-2017 “Test Specifications for Interoperability of Conductive Charging Systems for Electric Vehicles—Part 1: Power Supply Equipment”
NB/T 33002-2010 "Technical Specifications for Electric Vehicle AC EV charger"
NB/T 33008.2-2013 "Inspection and Testing Specifications for Electric Vehicle Charging Equipment—Part 2: AC EV charger"
II. EV charger testing and certification ProcessDuring the production process, companies must conduct sampling inspections of EV charger to verify the stability of product quality.
The EV charger testing and certification process is not merely a superficial inspection; rather, it involves a series of rigorous steps to ensure that all product performance indicators meet international standards.
1. Documentation Review
The pre-inspection document review involves evaluating the technical documentation required for the EV charger certification process, including: nameplates, instruction manuals, model and specification parameters, component lists, and electrical schematics.
2. Sample Testing
Detailed sample testing involves comprehensive evaluation of the EV charger’s performance characteristics, such as charging sequence, charging efficiency, charging stability, and electromagnetic compatibility. This step requires the use of specialized testing equipment and methods to ensure the accuracy and reliability of the test results. Safety testing involves evaluating the safety protection measures of EV charger, such as overcurrent protection, overvoltage protection, short-circuit protection, ground fault protection, and insulation monitoring. It also ensures that EV charger can promptly cut off the power supply in the event of an anomaly to guarantee safe use.
3. Report Confirmation
Final confirmation of the relevant draft report.
4. Certificate Issuance
After completing the above tests, the certification body will conduct a certification audit of the EV charger report, including a review of the test report and an on-site inspection of the EV charger. If the audit is passed, the EV charger will receive the corresponding certification.
III. Challenges Faced by EV charger and testing and certification During the process of exporting EV charger to testing and certification, there are several insurmountable technical challenges that require companies to possess extensive experience and strong technical capabilities. The continuous evolution of electric vehicle technology means that EV charger must constantly adapt to new communication protocols and charging standards, placing higher demands on companies’ R&D capabilities.
1. Standardization Challenges
Although relevant EV charger testing and certification standards have been established both internationally and domestically, difficulties in implementing these standards persist in practice. On the one hand, standards may vary across different countries and regions, creating inconveniences for the cross-border or cross-regional use of EV charger; on the other hand, as technology continues to evolve, existing standards may no longer meet new requirements, necessitating constant updates and revisions.
2. Technical Challenges
The testing of EV charger involves knowledge and technologies across multiple fields, such as power electronics, electromagnetic compatibility, and computer networks. This requires testing organizations to possess professional technical capabilities and advanced testing equipment to ensure the accuracy and reliability of test results. Furthermore, since different types and brands of EV charger may vary in structure and performance, this presents certain challenges for testing and certification. For example, in the design of EV charger, electrical performance, charging sequences, ground fault protection, and software security have always been key metrics that test manufacturers’ capabilities. During the testing and certification process, attention must be paid to multiple aspects—including output power, current waveforms, and voltage stability—to ensure an efficient and stable charging process.
3. Safety Challenges
As a power device, the safety performance of EV charger is one of the key focuses of testing and certification. The certification process involves rigorous testing of insulation resistance, ground fault protection, and lightning protection capabilities to ensure the product remains reliable and safe even in complex power environments. However, due to factors such as the operating environment and improper operation, EV charger may experience issues such as overcurrent, overvoltage, and short circuits, posing a threat to operational safety. Therefore, during the testing and certification process, the safety performance of EV charger must undergo rigorous testing and evaluation to ensure safe operation.
As the global market share of EV charger continues to grow and regulations and standards in various countries are constantly evolving, companies must stay informed and promptly adjust their product designs and testing protocols to ensure the products’ market accessibility worldwide.